From 492bc7c3d757f06ac246a61f6f27e19702ad08a5 Mon Sep 17 00:00:00 2001
From: Ronald Tse <ronald.tse@ribose.com>
Date: Thu, 14 May 2026 07:16:28 +0800
Subject: [PATCH 1/2] feat: add XSD direct block syntax and extract
 build_file_system

Add lutaml_xsd::path[context, template, options] direct block syntax
to LutamlXsdPreprocessor, enabling external Liquid template files for
XSD schema rendering.

Extract FILE_SYSTEM_PATTERNS constant and build_file_system method
into BasePreprocessor for reuse by both block and direct syntax paths.

Enable rubygems MFA requirement in gemspec.
---
 .gitignore                                    |    3 +
 .rubocop_todo.yml                             |  100 +-
 Gemfile                                       |    1 -
 .../plugin/lutaml/base_preprocessor.rb        |   22 +-
 .../plugin/lutaml/lutaml_xsd_preprocessor.rb  |   54 +
 metanorma-plugin-lutaml.gemspec               |    2 +-
 .../_attribute_groups.adoc                    |   11 +
 .../_complex_type.adoc                        |   11 +
 .../unitsml_liquid_templates/_elements.adoc   |    5 +
 .../unitsml_liquid_templates/schema.adoc      |   11 +
 spec/fixtures/lutaml/xsd_schemas/omml.xsd     | 1534 +++++++++++++++++
 .../lutaml/xsd_schemas/unitsml-v1.0-csd04.xsd | 1335 ++++++++++++++
 spec/fixtures/lutaml/xsd_schemas/wml.xsd      |   19 +
 13 files changed, 3047 insertions(+), 61 deletions(-)
 create mode 100644 spec/fixtures/lutaml/unitsml_liquid_templates/_attribute_groups.adoc
 create mode 100644 spec/fixtures/lutaml/unitsml_liquid_templates/_complex_type.adoc
 create mode 100644 spec/fixtures/lutaml/unitsml_liquid_templates/_elements.adoc
 create mode 100644 spec/fixtures/lutaml/unitsml_liquid_templates/schema.adoc
 create mode 100644 spec/fixtures/lutaml/xsd_schemas/omml.xsd
 create mode 100644 spec/fixtures/lutaml/xsd_schemas/unitsml-v1.0-csd04.xsd
 create mode 100644 spec/fixtures/lutaml/xsd_schemas/wml.xsd

diff --git a/.gitignore b/.gitignore
index 7d1e5bdc..37f46b04 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,6 +2,9 @@ Gemfile.lock
 .rspec_status
 spec/assets/lutaml
 test.err
+test.err.html
+TODO.cleanup/
+pkg/
 
 .rubocop-https--*
 .DS_Store
diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index b10dde28..06ea17b9 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -1,6 +1,6 @@
 # This configuration was generated by
 # `rubocop --auto-gen-config`
-# on 2026-05-12 14:53:16 UTC using RuboCop version 1.86.1.
+# on 2026-05-13 23:15:25 UTC using RuboCop version 1.86.1.
 # The point is for the user to remove these configuration records
 # one by one as the offenses are removed from the code base.
 # Note that changes in the inspected code, or installation of new
@@ -12,75 +12,67 @@ Gemspec/RequireMFA:
   Exclude:
     - 'metanorma-plugin-lutaml.gemspec'
 
-# Offense count: 1
+# Offense count: 4
 # This cop supports safe autocorrection (--autocorrect).
 # Configuration parameters: EnforcedStyle, IndentationWidth.
 # SupportedStyles: with_first_argument, with_fixed_indentation
 Layout/ArgumentAlignment:
   Exclude:
-    - 'lib/metanorma/plugin/lutaml/lutaml_klass_table_block_macro.rb'
+    - 'spec/regen_expected.rb'
+    - 'spec/regen_expected_spec.rb'
 
 # Offense count: 1
 # This cop supports safe autocorrection (--autocorrect).
-Layout/ClosingParenthesisIndentation:
+# Configuration parameters: IndentationWidth.
+Layout/AssignmentIndentation:
   Exclude:
-    - 'lib/metanorma/plugin/lutaml/lutaml_ea_xmi_base.rb'
+    - 'lib/metanorma/plugin/lutaml/base_preprocessor.rb'
 
-# Offense count: 1
+# Offense count: 2
 # This cop supports safe autocorrection (--autocorrect).
 Layout/EmptyLines:
   Exclude:
-    - 'lib/metanorma/plugin/lutaml/lutaml_ea_xmi_base.rb'
-
-# Offense count: 1
-# This cop supports safe autocorrection (--autocorrect).
-# Configuration parameters: EnforcedStyle, IndentationWidth.
-# SupportedStyles: consistent, consistent_relative_to_receiver, special_for_inner_method_call, special_for_inner_method_call_in_parentheses
-Layout/FirstArgumentIndentation:
-  Exclude:
-    - 'lib/metanorma/plugin/lutaml/lutaml_ea_xmi_base.rb'
+    - 'spec/regen_expected.rb'
 
-# Offense count: 9
+# Offense count: 12
 # This cop supports safe autocorrection (--autocorrect).
 # Configuration parameters: Max, AllowHeredoc, AllowURI, AllowQualifiedName, URISchemes, AllowRBSInlineAnnotation, AllowCopDirectives, AllowedPatterns, SplitStrings.
 # URISchemes: http, https
 Layout/LineLength:
   Exclude:
     - 'Rakefile'
+    - 'lib/metanorma/plugin/lutaml/base_preprocessor.rb'
     - 'lib/metanorma/plugin/lutaml/lutaml_ea_xmi_base.rb'
-    - 'lib/metanorma/plugin/lutaml/lutaml_klass_table_block_macro.rb'
     - 'lib/metanorma/plugin/lutaml/utils.rb'
     - 'spec/metanorma/plugin/lutaml/lutaml_uml_datamodel_description_preprocessor_spec.rb'
+    - 'spec/metanorma/plugin/lutaml/lutaml_xsd_preprocessor_spec.rb'
+    - 'spec/regen_expected.rb'
+    - 'spec/regen_expected_spec.rb'
     - 'spec/support/shared_examples/structured_data_2_text_preprocessor.rb'
 
-# Offense count: 1
+# Offense count: 2
 # This cop supports safe autocorrection (--autocorrect).
 # Configuration parameters: EnforcedStyle.
-# SupportedStyles: symmetrical, new_line, same_line
-Layout/MultilineMethodCallBraceLayout:
+# SupportedStyles: final_newline, final_blank_line
+Layout/TrailingEmptyLines:
   Exclude:
-    - 'lib/metanorma/plugin/lutaml/lutaml_ea_xmi_base.rb'
+    - 'Gemfile'
+    - 'spec/regen_expected.rb'
 
-# Offense count: 3
+# Offense count: 5
 # This cop supports safe autocorrection (--autocorrect).
 # Configuration parameters: AllowInHeredoc.
 Layout/TrailingWhitespace:
   Exclude:
-    - 'lib/metanorma/plugin/lutaml/lutaml_ea_xmi_base.rb'
-    - 'lib/metanorma/plugin/lutaml/lutaml_klass_table_block_macro.rb'
+    - 'lib/metanorma/plugin/lutaml/base_preprocessor.rb'
+    - 'spec/regen_expected.rb'
+    - 'spec/regen_expected_spec.rb'
 
-# Offense count: 1
-# This cop supports safe autocorrection (--autocorrect).
-# Configuration parameters: AllowUnusedKeywordArguments, IgnoreEmptyMethods, IgnoreNotImplementedMethods, NotImplementedExceptions.
-# NotImplementedExceptions: NotImplementedError
-Lint/UnusedMethodArgument:
-  Exclude:
-    - 'lib/metanorma/plugin/lutaml/lutaml_ea_xmi_base.rb'
-
-# Offense count: 1
+# Offense count: 2
 # Configuration parameters: AllowedMethods, AllowedPatterns, CountRepeatedAttributes, Max.
 Metrics/AbcSize:
   Exclude:
+    - 'lib/metanorma/plugin/lutaml/lutaml_xsd_preprocessor.rb'
     - 'lib/metanorma/plugin/lutaml/utils.rb'
 
 # Offense count: 2
@@ -90,7 +82,7 @@ Metrics/CyclomaticComplexity:
     - 'lib/metanorma/plugin/lutaml/lutaml_ea_xmi_base.rb'
     - 'lib/metanorma/plugin/lutaml/utils.rb'
 
-# Offense count: 3
+# Offense count: 7
 # Configuration parameters: CountComments, CountAsOne, AllowedMethods, AllowedPatterns.
 Metrics/MethodLength:
   Max: 19
@@ -118,12 +110,6 @@ Naming/PredicateMethod:
     - 'lib/metanorma/plugin/lutaml/asciidoctor/preprocessor.rb'
     - 'lib/metanorma/plugin/lutaml/liquid/custom_filters/file_exist.rb'
 
-# Offense count: 1
-# This cop supports unsafe autocorrection (--autocorrect-all).
-Performance/AncestorsInclude:
-  Exclude:
-    - 'lib/metanorma/plugin/lutaml/utils.rb'
-
 # Offense count: 86
 # Configuration parameters: Prefixes, AllowedPatterns.
 # Prefixes: when, with, without
@@ -141,10 +127,16 @@ RSpec/ContextWording:
     - 'spec/metanorma/plugin/lutaml/macros_data2text_spec.rb'
     - 'spec/support/shared_examples/structured_data_2_text_preprocessor.rb'
 
-# Offense count: 37
+# Offense count: 1
+# Configuration parameters: IgnoredMetadata.
+RSpec/DescribeClass:
+  Exclude:
+    - 'spec/regen_expected_spec.rb'
+
+# Offense count: 40
 # Configuration parameters: CountAsOne.
 RSpec/ExampleLength:
-  Max: 26
+  Max: 38
 
 # Offense count: 13
 # Configuration parameters: Max, AllowedIdentifiers, AllowedPatterns.
@@ -169,11 +161,11 @@ RSpec/LeakyLocalVariable:
     - 'spec/metanorma/plugin/lutaml/lutaml_uml_datamodel_description_preprocessor_spec.rb'
     - 'spec/metanorma/plugin/lutaml/lutaml_xmi_index_spec.rb'
 
-# Offense count: 14
+# Offense count: 16
 RSpec/MultipleExpectations:
   Max: 6
 
-# Offense count: 9
+# Offense count: 15
 # Configuration parameters: AllowSubject.
 RSpec/MultipleMemoizedHelpers:
   Max: 8
@@ -191,11 +183,17 @@ RSpec/NamedSubject:
     - 'spec/metanorma/plugin/lutaml/lutaml_xmi_index_spec.rb'
     - 'spec/metanorma/plugin/lutaml/source_extractor_spec.rb'
 
-# Offense count: 117
+# Offense count: 124
 # Configuration parameters: AllowedGroups.
 RSpec/NestedGroups:
   Max: 7
 
+# Offense count: 3
+# This cop supports unsafe autocorrection (--autocorrect-all).
+RSpec/Output:
+  Exclude:
+    - 'spec/regen_expected.rb'
+
 # Offense count: 1
 RSpec/PendingWithoutReason:
   Exclude:
@@ -225,14 +223,16 @@ RSpec/SubjectDeclaration:
 
 # Offense count: 1
 # This cop supports safe autocorrection (--autocorrect).
-Style/RedundantBegin:
+# Configuration parameters: EnforcedStyle, ConsistentQuotesInMultiline.
+# SupportedStyles: single_quotes, double_quotes
+Style/StringLiterals:
   Exclude:
-    - 'lib/metanorma/plugin/lutaml/lutaml_ea_xmi_base.rb'
+    - 'metanorma-plugin-lutaml.gemspec'
 
 # Offense count: 1
 # This cop supports safe autocorrection (--autocorrect).
-# Configuration parameters: EnforcedStyle, ConsistentQuotesInMultiline.
+# Configuration parameters: EnforcedStyle.
 # SupportedStyles: single_quotes, double_quotes
-Style/StringLiterals:
+Style/StringLiteralsInInterpolation:
   Exclude:
-    - 'metanorma-plugin-lutaml.gemspec'
+    - 'spec/metanorma/plugin/lutaml/lutaml_xsd_preprocessor_spec.rb'
diff --git a/Gemfile b/Gemfile
index 202a0e17..87c88517 100644
--- a/Gemfile
+++ b/Gemfile
@@ -28,4 +28,3 @@ gem "simplecov"
 gem "timecop"
 gem "vcr"
 gem "webmock"
-
diff --git a/lib/metanorma/plugin/lutaml/base_preprocessor.rb b/lib/metanorma/plugin/lutaml/base_preprocessor.rb
index 8ea9f05c..bcf2e4ff 100644
--- a/lib/metanorma/plugin/lutaml/base_preprocessor.rb
+++ b/lib/metanorma/plugin/lutaml/base_preprocessor.rb
@@ -24,6 +24,8 @@ module Lutaml
       class BasePreprocessor < ::Asciidoctor::Extensions::Preprocessor
         include Utils
 
+        FILE_SYSTEM_PATTERNS = ["%s.liquid", "_%s.liquid", "_%s.adoc"].freeze
+
         def process(document, reader)
           input_lines = Asciidoctor::PreprocessorNoIfdefsReader
             .new(document, reader.lines).readlines.to_enum
@@ -75,6 +77,15 @@ def index_missing_message(path)
             "please specify the full path."
         end
 
+        def build_file_system(document, options)
+          include_paths = [Utils.relative_file_path(document, "")]
+          options["include_path"]&.split(",")&.each do |path|
+            include_paths.push(Utils.relative_file_path(document, path))
+          end
+          ::Metanorma::Plugin::Lutaml::Liquid::LocalFileSystem
+            .new(include_paths, FILE_SYSTEM_PATTERNS)
+        end
+
         private
 
         def process_input_lines(document:, input_lines:, express_indexes:)
@@ -151,16 +162,9 @@ def render_liquid_template(document:, lines:, context_name:, # rubocop:disable M
             options: options.merge("document" => document)
           )
 
-          include_paths = [Utils.relative_file_path(document, "")]
-          options["include_path"]&.split(",")&.each do |path|
-            include_paths.push(Utils.relative_file_path(document, path))
-          end
-
-          file_system = ::Metanorma::Plugin::Lutaml::Liquid::LocalFileSystem
-            .new(include_paths, ["%s.liquid", "_%s.liquid", "_%s.adoc"])
-
           parsed_template = template(lines)
-          parsed_template.registers[:file_system] = file_system
+          parsed_template.registers[:file_system] =
+            build_file_system(document, options)
 
           all_items.map do |item|
             parsed_template.assigns[context_name] = item[:liquid_drop]
diff --git a/lib/metanorma/plugin/lutaml/lutaml_xsd_preprocessor.rb b/lib/metanorma/plugin/lutaml/lutaml_xsd_preprocessor.rb
index eb8e97a2..9034786b 100644
--- a/lib/metanorma/plugin/lutaml/lutaml_xsd_preprocessor.rb
+++ b/lib/metanorma/plugin/lutaml/lutaml_xsd_preprocessor.rb
@@ -9,6 +9,10 @@ module Lutaml
       # lutaml-model's XSD parser and exposes the schema object to Liquid
       # templates.
       #
+      # Two syntaxes are supported:
+      #   Block:  [lutaml_xsd, path, context, options] .... ----
+      #   Direct: lutaml_xsd::path[context, template, options]
+      #
       # Caching: parsed XSD results are cached at two levels:
       # - Class-level (@@xsd_cache) persists across document invocations
       # - Document-level (document.attributes["lutaml_xsd_cache"]) within a
@@ -26,6 +30,19 @@ class LutamlXsdPreprocessor < BasePreprocessor
           \]                           # Closing bracket
         }x
 
+        XSD_DIRECT_REGEX = %r{
+          ^\s*                         # Start of line
+          lutaml_xsd::                 # Macro prefix
+          (?<file_path>[^\[]+?)        # XSD file path
+          \[                           # Opening bracket
+          (?<context_name>[^,]+)       # Context name
+          ,\s*                         # Comma separator
+          (?<template>[^,\]]+)         # Template file path
+          (?<options>,[^\]]+)?         # Optional options
+          \]                           # Closing bracket
+          \s*$                         # End of line
+        }x
+
         def initialize(_config = {})
           super
           @@xsd_cache ||= {}
@@ -71,6 +88,43 @@ def template(lines)
 
         private
 
+        def process_text_blocks(document, input_lines, express_indexes)
+          match = xsd_direct?(input_lines.peek)
+          return handle_direct_block(document, input_lines, match) if match
+
+          super
+        end
+
+        def xsd_direct?(line)
+          line.match(XSD_DIRECT_REGEX)
+        end
+
+        def handle_direct_block(document, input_lines, match)
+          input_lines.next # consume the matched line
+
+          file_path = match[:file_path].strip
+          context_name = match[:context_name].strip
+          template_file = Utils.relative_file_path(document,
+                                                   match[:template].strip)
+          options = match[:options] ? parse_options(match[:options].strip) : {}
+
+          schema = load_lutaml_file(document, file_path, options)
+          schema_drop = update_repo(options, schema).to_liquid
+
+          template_source = File.read(template_file, encoding: "UTF-8")
+          tmpl = template([template_source])
+          tmpl.registers[:file_system] = build_file_system(document, options)
+          tmpl.assigns[context_name] = schema_drop
+
+          tmpl.render.split("\n", -1)
+        rescue StandardError => e
+          ::Metanorma::Util.log(
+            "[#{self.class.name}] Failed to parse LutaML block: #{e.message}",
+            :error,
+          )
+          raise e
+        end
+
         def parse_xsd_file(full_path, location)
           File.open(full_path, "r:UTF-8") do |file|
             ::Lutaml::Xml::Parsers::Xsd.parse(file, location: location)
diff --git a/metanorma-plugin-lutaml.gemspec b/metanorma-plugin-lutaml.gemspec
index c177527f..de64da4e 100644
--- a/metanorma-plugin-lutaml.gemspec
+++ b/metanorma-plugin-lutaml.gemspec
@@ -38,5 +38,5 @@ Gem::Specification.new do |spec|
   spec.add_dependency "ogc-gml", "~> 1.1"
   spec.add_dependency "relaton-cli"
 
-  spec.metadata["rubygems_mfa_required"] = "false"
+  spec.metadata["rubygems_mfa_required"] = "true"
 end
diff --git a/spec/fixtures/lutaml/unitsml_liquid_templates/_attribute_groups.adoc b/spec/fixtures/lutaml/unitsml_liquid_templates/_attribute_groups.adoc
new file mode 100644
index 00000000..1c7e60c3
--- /dev/null
+++ b/spec/fixtures/lutaml/unitsml_liquid_templates/_attribute_groups.adoc
@@ -0,0 +1,11 @@
+{% for attribute_group in schema.attribute_group %}
+
+=== {{ attribute_group.name }}
+
+{% capture used_by %}
+  {% for attr in attribute_group.used_by %}{{ attr.name | default: attr.ref }}{% unless forloop.last %}, {% endunless %}{% endfor %}
+{% endcapture %}
+
+*Used By*:: {{ used_by }}
+  
+{% endfor %}
diff --git a/spec/fixtures/lutaml/unitsml_liquid_templates/_complex_type.adoc b/spec/fixtures/lutaml/unitsml_liquid_templates/_complex_type.adoc
new file mode 100644
index 00000000..4b7988d1
--- /dev/null
+++ b/spec/fixtures/lutaml/unitsml_liquid_templates/_complex_type.adoc
@@ -0,0 +1,11 @@
+{% for complex_type in schema.complex_type %}
+
+=== Complex Type: *{{ complex_type.name }}*
+
+{% capture complex_type_used_by %}
+  {% for used_by in complex_type.used_by %}{{ used_by.name | default: used_by.ref }}{% unless forloop.last %}, {% endunless %}{% endfor %}
+{% endcapture %}
+
+*Used By*:: {{ complex_type_used_by }}
+
+{% endfor %}
diff --git a/spec/fixtures/lutaml/unitsml_liquid_templates/_elements.adoc b/spec/fixtures/lutaml/unitsml_liquid_templates/_elements.adoc
new file mode 100644
index 00000000..d9c5c392
--- /dev/null
+++ b/spec/fixtures/lutaml/unitsml_liquid_templates/_elements.adoc
@@ -0,0 +1,5 @@
+{% for element in schema.element %}
+
+=== Element: *{{ element.name }}*
+
+{% endfor %}
diff --git a/spec/fixtures/lutaml/unitsml_liquid_templates/schema.adoc b/spec/fixtures/lutaml/unitsml_liquid_templates/schema.adoc
new file mode 100644
index 00000000..54cd651d
--- /dev/null
+++ b/spec/fixtures/lutaml/unitsml_liquid_templates/schema.adoc
@@ -0,0 +1,11 @@
+== Elements
+
+{% render "elements", schema: schema %}
+
+== Complex Types
+
+{% render "complex_type", schema: schema %}
+
+== Attribute Groups
+
+{% render "attribute_groups", schema: schema %}
diff --git a/spec/fixtures/lutaml/xsd_schemas/omml.xsd b/spec/fixtures/lutaml/xsd_schemas/omml.xsd
new file mode 100644
index 00000000..8ad4b60e
--- /dev/null
+++ b/spec/fixtures/lutaml/xsd_schemas/omml.xsd
@@ -0,0 +1,1534 @@
+<?xml version="1.0" encoding="utf-8"?>
+<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" attributeFormDefault="qualified" blockDefault="#all" targetNamespace="http://schemas.openxmlformats.org/officeDocument/2006/math"
+  xmlns="http://schemas.openxmlformats.org/officeDocument/2006/math"
+  xmlns:m="http://schemas.openxmlformats.org/officeDocument/2006/math"
+  xmlns:w="http://schemas.openxmlformats.org/wordprocessingml/2006/main">
+  <xsd:import id="w" namespace="http://schemas.openxmlformats.org/wordprocessingml/2006/main" schemaLocation="wml.xsd" />
+  <xsd:import id="xml" namespace="http://www.w3.org/XML/1998/namespace" />
+  <xsd:simpleType name="ST_Integer255">
+    <xsd:annotation>
+      <xsd:documentation>Integer value (1 to 255)</xsd:documentation>
+    </xsd:annotation>
+    <xsd:restriction base="xsd:integer">
+      <xsd:minInclusive value="1" />
+      <xsd:maxInclusive value="255" />
+    </xsd:restriction>
+  </xsd:simpleType>
+  <xsd:complexType name="CT_Integer255">
+    <xsd:attribute name="val" type="ST_Integer255" use="required">
+      <xsd:annotation>
+        <xsd:documentation>Value</xsd:documentation>
+      </xsd:annotation>
+    </xsd:attribute>
+  </xsd:complexType>
+  <xsd:simpleType name="ST_Integer2">
+    <xsd:annotation>
+      <xsd:documentation>Integer value (-2 to 2)</xsd:documentation>
+    </xsd:annotation>
+    <xsd:restriction base="xsd:integer">
+      <xsd:minInclusive value="-2" />
+      <xsd:maxInclusive value="2" />
+    </xsd:restriction>
+  </xsd:simpleType>
+  <xsd:complexType name="CT_Integer2">
+    <xsd:attribute name="val" type="ST_Integer2" use="required">
+      <xsd:annotation>
+        <xsd:documentation>Value</xsd:documentation>
+      </xsd:annotation>
+    </xsd:attribute>
+  </xsd:complexType>
+  <xsd:simpleType name="ST_SpacingRule">
+    <xsd:annotation>
+      <xsd:documentation>Spacing Rule</xsd:documentation>
+    </xsd:annotation>
+    <xsd:restriction base="xsd:integer">
+      <xsd:minInclusive value="0" />
+      <xsd:maxInclusive value="4" />
+    </xsd:restriction>
+  </xsd:simpleType>
+  <xsd:complexType name="CT_SpacingRule">
+    <xsd:attribute name="val" type="ST_SpacingRule" use="required">
+      <xsd:annotation>
+        <xsd:documentation>Value</xsd:documentation>
+      </xsd:annotation>
+    </xsd:attribute>
+  </xsd:complexType>
+  <xsd:simpleType name="ST_UnSignedInteger">
+    <xsd:annotation>
+      <xsd:documentation>Unsigned integer.</xsd:documentation>
+    </xsd:annotation>
+    <xsd:restriction base="xsd:unsignedInt" />
+  </xsd:simpleType>
+  <xsd:complexType name="CT_UnSignedInteger">
+    <xsd:attribute name="val" type="ST_UnSignedInteger" use="required">
+      <xsd:annotation>
+        <xsd:documentation>Value</xsd:documentation>
+      </xsd:annotation>
+    </xsd:attribute>
+  </xsd:complexType>
+  <xsd:simpleType name="ST_Char">
+    <xsd:annotation>
+      <xsd:documentation>Character</xsd:documentation>
+    </xsd:annotation>
+    <xsd:restriction base="xsd:string">
+      <xsd:maxLength value="1" />
+    </xsd:restriction>
+  </xsd:simpleType>
+  <xsd:complexType name="CT_Char">
+    <xsd:attribute name="val" type="ST_Char" use="required">
+      <xsd:annotation>
+        <xsd:documentation>value</xsd:documentation>
+      </xsd:annotation>
+    </xsd:attribute>
+  </xsd:complexType>
+  <xsd:simpleType name="ST_OnOff">
+    <xsd:annotation>
+      <xsd:documentation>On Off</xsd:documentation>
+    </xsd:annotation>
+    <xsd:restriction base="xsd:string">
+      <xsd:enumeration value="on">
+        <xsd:annotation>
+          <xsd:documentation>On</xsd:documentation>
+        </xsd:annotation>
+      </xsd:enumeration>
+      <xsd:enumeration value="off">
+        <xsd:annotation>
+          <xsd:documentation>Off</xsd:documentation>
+        </xsd:annotation>
+      </xsd:enumeration>
+    </xsd:restriction>
+  </xsd:simpleType>
+  <xsd:complexType name="CT_OnOff">
+    <xsd:attribute name="val" type="ST_OnOff">
+      <xsd:annotation>
+        <xsd:documentation>value</xsd:documentation>
+      </xsd:annotation>
+    </xsd:attribute>
+  </xsd:complexType>
+  <xsd:simpleType name="ST_String">
+    <xsd:annotation>
+      <xsd:documentation>String</xsd:documentation>
+    </xsd:annotation>
+    <xsd:restriction base="xsd:string" />
+  </xsd:simpleType>
+  <xsd:complexType name="CT_String">
+    <xsd:attribute name="val" type="ST_String">
+      <xsd:annotation>
+        <xsd:documentation>value</xsd:documentation>
+      </xsd:annotation>
+    </xsd:attribute>
+  </xsd:complexType>
+  <xsd:simpleType name="ST_XAlign">
+    <xsd:annotation>
+      <xsd:documentation>Horizontal Alignment</xsd:documentation>
+    </xsd:annotation>
+    <xsd:restriction base="xsd:string">
+      <xsd:enumeration value="left">
+        <xsd:annotation>
+          <xsd:documentation>Left Justification</xsd:documentation>
+        </xsd:annotation>
+      </xsd:enumeration>
+      <xsd:enumeration value="center">
+        <xsd:annotation>
+          <xsd:documentation>Center</xsd:documentation>
+        </xsd:annotation>
+      </xsd:enumeration>
+      <xsd:enumeration value="right">
+        <xsd:annotation>
+          <xsd:documentation>Right</xsd:documentation>
+        </xsd:annotation>
+      </xsd:enumeration>
+    </xsd:restriction>
+  </xsd:simpleType>
+  <xsd:complexType name="CT_XAlign">
+    <xsd:attribute name="val" type="ST_XAlign" use="required">
+      <xsd:annotation>
+        <xsd:documentation>Value</xsd:documentation>
+      </xsd:annotation>
+    </xsd:attribute>
+  </xsd:complexType>
+  <xsd:simpleType name="ST_YAlign">
+    <xsd:annotation>
+      <xsd:documentation>Vertical Alignment</xsd:documentation>
+    </xsd:annotation>
+    <xsd:restriction base="xsd:string">
+      <xsd:enumeration value="top">
+        <xsd:annotation>
+          <xsd:documentation>Top</xsd:documentation>
+        </xsd:annotation>
+      </xsd:enumeration>
+      <xsd:enumeration value="center">
+        <xsd:annotation>
+          <xsd:documentation>Center (Function)</xsd:documentation>
+        </xsd:annotation>
+      </xsd:enumeration>
+      <xsd:enumeration value="bot">
+        <xsd:annotation>
+          <xsd:documentation>Bottom Alignment</xsd:documentation>
+        </xsd:annotation>
+      </xsd:enumeration>
+    </xsd:restriction>
+  </xsd:simpleType>
+  <xsd:complexType name="CT_YAlign">
+    <xsd:attribute name="val" type="ST_YAlign" use="required">
+      <xsd:annotation>
+        <xsd:documentation>Value</xsd:documentation>
+      </xsd:annotation>
+    </xsd:attribute>
+  </xsd:complexType>
+  <xsd:simpleType name="ST_Shp">
+    <xsd:annotation>
+      <xsd:documentation>Shape (Delimiters)</xsd:documentation>
+    </xsd:annotation>
+    <xsd:restriction base="xsd:string">
+      <xsd:enumeration value="centered">
+        <xsd:annotation>
+          <xsd:documentation>Centered (Delimiters)</xsd:documentation>
+        </xsd:annotation>
+      </xsd:enumeration>
+      <xsd:enumeration value="match">
+        <xsd:annotation>
+          <xsd:documentation>Match</xsd:documentation>
+        </xsd:annotation>
+      </xsd:enumeration>
+    </xsd:restriction>
+  </xsd:simpleType>
+  <xsd:complexType name="CT_Shp">
+    <xsd:attribute name="val" type="ST_Shp" use="required">
+      <xsd:annotation>
+        <xsd:documentation>Value</xsd:documentation>
+      </xsd:annotation>
+    </xsd:attribute>
+  </xsd:complexType>
+  <xsd:simpleType name="ST_FType">
+    <xsd:annotation>
+      <xsd:documentation>Fraction Type</xsd:documentation>
+    </xsd:annotation>
+    <xsd:restriction base="xsd:string">
+      <xsd:enumeration value="bar">
+        <xsd:annotation>
+          <xsd:documentation>Bar Fraction</xsd:documentation>
+        </xsd:annotation>
+      </xsd:enumeration>
+      <xsd:enumeration value="skw">
+        <xsd:annotation>
+          <xsd:documentation>Skewed</xsd:documentation>
+        </xsd:annotation>
+      </xsd:enumeration>
+      <xsd:enumeration value="lin">
+        <xsd:annotation>
+          <xsd:documentation>Linear Fraction</xsd:documentation>
+        </xsd:annotation>
+      </xsd:enumeration>
+      <xsd:enumeration value="noBar">
+        <xsd:annotation>
+          <xsd:documentation>No-Bar Fraction (Stack)</xsd:documentation>
+        </xsd:annotation>
+      </xsd:enumeration>
+    </xsd:restriction>
+  </xsd:simpleType>
+  <xsd:complexType name="CT_FType">
+    <xsd:attribute name="val" type="ST_FType" use="required">
+      <xsd:annotation>
+        <xsd:documentation>Value</xsd:documentation>
+      </xsd:annotation>
+    </xsd:attribute>
+  </xsd:complexType>
+  <xsd:simpleType name="ST_LimLoc">
+    <xsd:annotation>
+      <xsd:documentation>Limit Location</xsd:documentation>
+    </xsd:annotation>
+    <xsd:restriction base="xsd:string">
+      <xsd:enumeration value="undOvr">
+        <xsd:annotation>
+          <xsd:documentation>Under-Over location</xsd:documentation>
+        </xsd:annotation>
+      </xsd:enumeration>
+      <xsd:enumeration value="subSup">
+        <xsd:annotation>
+          <xsd:documentation>Subscript-Superscript location</xsd:documentation>
+        </xsd:annotation>
+      </xsd:enumeration>
+    </xsd:restriction>
+  </xsd:simpleType>
+  <xsd:complexType name="CT_LimLoc">
+    <xsd:attribute name="val" type="ST_LimLoc" use="required">
+      <xsd:annotation>
+        <xsd:documentation>Value</xsd:documentation>
+      </xsd:annotation>
+    </xsd:attribute>
+  </xsd:complexType>
+  <xsd:simpleType name="ST_TopBot">
+    <xsd:annotation>
+      <xsd:documentation>Top-Bottom</xsd:documentation>
+    </xsd:annotation>
+    <xsd:restriction base="xsd:string">
+      <xsd:enumeration value="top">
+        <xsd:annotation>
+          <xsd:documentation>Top</xsd:documentation>
+        </xsd:annotation>
+      </xsd:enumeration>
+      <xsd:enumeration value="bot">
+        <xsd:annotation>
+          <xsd:documentation>Bottom Alignment</xsd:documentation>
+        </xsd:annotation>
+      </xsd:enumeration>
+    </xsd:restriction>
+  </xsd:simpleType>
+  <xsd:complexType name="CT_TopBot">
+    <xsd:attribute name="val" type="ST_TopBot" use="required">
+      <xsd:annotation>
+        <xsd:documentation>Value</xsd:documentation>
+      </xsd:annotation>
+    </xsd:attribute>
+  </xsd:complexType>
+  <xsd:simpleType name="ST_Script">
+    <xsd:annotation>
+      <xsd:documentation>Script</xsd:documentation>
+    </xsd:annotation>
+    <xsd:restriction base="xsd:string">
+      <xsd:enumeration value="roman">
+        <xsd:annotation>
+          <xsd:documentation>Roman</xsd:documentation>
+        </xsd:annotation>
+      </xsd:enumeration>
+      <xsd:enumeration value="script">
+        <xsd:annotation>
+          <xsd:documentation>Script</xsd:documentation>
+        </xsd:annotation>
+      </xsd:enumeration>
+      <xsd:enumeration value="fraktur">
+        <xsd:annotation>
+          <xsd:documentation>Fraktur</xsd:documentation>
+        </xsd:annotation>
+      </xsd:enumeration>
+      <xsd:enumeration value="double-struck">
+        <xsd:annotation>
+          <xsd:documentation>double-struck</xsd:documentation>
+        </xsd:annotation>
+      </xsd:enumeration>
+      <xsd:enumeration value="sans-serif">
+        <xsd:annotation>
+          <xsd:documentation>Sans-Serif</xsd:documentation>
+        </xsd:annotation>
+      </xsd:enumeration>
+      <xsd:enumeration value="monospace">
+        <xsd:annotation>
+          <xsd:documentation>Monospace</xsd:documentation>
+        </xsd:annotation>
+      </xsd:enumeration>
+    </xsd:restriction>
+  </xsd:simpleType>
+  <xsd:complexType name="CT_Script">
+    <xsd:attribute name="val" type="ST_Script">
+      <xsd:annotation>
+        <xsd:documentation>Value</xsd:documentation>
+      </xsd:annotation>
+    </xsd:attribute>
+  </xsd:complexType>
+  <xsd:simpleType name="ST_Style">
+    <xsd:annotation>
+      <xsd:documentation>Style</xsd:documentation>
+    </xsd:annotation>
+    <xsd:restriction base="xsd:string">
+      <xsd:enumeration value="p">
+        <xsd:annotation>
+          <xsd:documentation>Plain</xsd:documentation>
+        </xsd:annotation>
+      </xsd:enumeration>
+      <xsd:enumeration value="b">
+        <xsd:annotation>
+          <xsd:documentation>Bold</xsd:documentation>
+        </xsd:annotation>
+      </xsd:enumeration>
+      <xsd:enumeration value="i">
+        <xsd:annotation>
+          <xsd:documentation>Italic</xsd:documentation>
+        </xsd:annotation>
+      </xsd:enumeration>
+      <xsd:enumeration value="bi">
+        <xsd:annotation>
+          <xsd:documentation>Bold-Italic</xsd:documentation>
+        </xsd:annotation>
+      </xsd:enumeration>
+    </xsd:restriction>
+  </xsd:simpleType>
+  <xsd:complexType name="CT_Style">
+    <xsd:attribute name="val" type="ST_Style">
+      <xsd:annotation>
+        <xsd:documentation>Value</xsd:documentation>
+      </xsd:annotation>
+    </xsd:attribute>
+  </xsd:complexType>
+  <xsd:complexType name="CT_ManualBreak">
+    <xsd:attribute name="alnAt" type="ST_Integer255">
+      <xsd:annotation>
+        <xsd:documentation>Index of Operator to Align To</xsd:documentation>
+      </xsd:annotation>
+    </xsd:attribute>
+  </xsd:complexType>
+  <xsd:group name="EG_ScriptStyle">
+    <xsd:sequence>
+      <xsd:element name="scr" minOccurs="0" type="CT_Script">
+        <xsd:annotation>
+          <xsd:documentation>Script</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="sty" minOccurs="0" type="CT_Style">
+        <xsd:annotation>
+          <xsd:documentation>style</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+    </xsd:sequence>
+  </xsd:group>
+  <xsd:complexType name="CT_RPR">
+    <xsd:sequence>
+      <xsd:element name="lit" minOccurs="0" type="CT_OnOff">
+        <xsd:annotation>
+          <xsd:documentation>Literal</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:choice>
+        <xsd:element name="nor" minOccurs="0" type="CT_OnOff">
+          <xsd:annotation>
+            <xsd:documentation>Normal Text</xsd:documentation>
+          </xsd:annotation>
+        </xsd:element>
+        <xsd:sequence>
+          <xsd:group ref="EG_ScriptStyle" />
+        </xsd:sequence>
+      </xsd:choice>
+      <xsd:element name="brk" minOccurs="0" type="CT_ManualBreak">
+        <xsd:annotation>
+          <xsd:documentation>Break</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="aln" minOccurs="0" type="CT_OnOff">
+        <xsd:annotation>
+          <xsd:documentation>Align</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:complexType name="CT_Text">
+    <xsd:simpleContent>
+      <xsd:extension base="ST_String">
+        <xsd:attribute ref="xml:space" use="optional">
+          <xsd:annotation>
+            <xsd:documentation>Content Contains Significant Whitespace</xsd:documentation>
+          </xsd:annotation>
+        </xsd:attribute>
+      </xsd:extension>
+    </xsd:simpleContent>
+  </xsd:complexType>
+  <xsd:complexType name="CT_R">
+    <xsd:sequence>
+      <xsd:element name="rPr" type="CT_RPR" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Run Properties</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:group ref="w:EG_RPr" minOccurs="0" />
+      <xsd:choice minOccurs="0" maxOccurs="unbounded">
+        <xsd:group ref="w:EG_RunInnerContent" />
+        <xsd:element name="t" type="CT_Text" minOccurs="0">
+          <xsd:annotation>
+            <xsd:documentation>Text</xsd:documentation>
+          </xsd:annotation>
+        </xsd:element>
+      </xsd:choice>
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:complexType name="CT_CtrlPr">
+    <xsd:sequence>
+      <xsd:group ref="w:EG_RPrMath" minOccurs="0" />
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:complexType name="CT_AccPr">
+    <xsd:sequence>
+      <xsd:element name="chr" type="CT_Char" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Accent Character</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="ctrlPr" type="CT_CtrlPr" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Control Properties</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:complexType name="CT_Acc">
+    <xsd:sequence>
+      <xsd:element name="accPr" type="CT_AccPr" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Accent Properties</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="e" type="CT_OMathArg">
+        <xsd:annotation>
+          <xsd:documentation>Base</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:complexType name="CT_BarPr">
+    <xsd:sequence>
+      <xsd:element name="pos" type="CT_TopBot" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Position (Bar)</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="ctrlPr" type="CT_CtrlPr" minOccurs="0"></xsd:element>
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:complexType name="CT_Bar">
+    <xsd:sequence>
+      <xsd:element name="barPr" type="CT_BarPr" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Bar Properties</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="e" type="CT_OMathArg">
+        <xsd:annotation>
+          <xsd:documentation>Base</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:complexType name="CT_BoxPr">
+    <xsd:sequence>
+      <xsd:element name="opEmu" type="CT_OnOff" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Operator Emulator</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="noBreak" type="CT_OnOff" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>No Break</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="diff" type="CT_OnOff" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Differential</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="brk" type="CT_ManualBreak" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Break</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="aln" type="CT_OnOff" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Alignment</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="ctrlPr" type="CT_CtrlPr" minOccurs="0"></xsd:element>
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:complexType name="CT_Box">
+    <xsd:sequence>
+      <xsd:element name="boxPr" type="CT_BoxPr" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Box Properties</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="e" type="CT_OMathArg">
+        <xsd:annotation>
+          <xsd:documentation>Base</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:complexType name="CT_BorderBoxPr">
+    <xsd:sequence>
+      <xsd:element name="hideTop" type="CT_OnOff" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Hide Top Edge</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="hideBot" type="CT_OnOff" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Hide Bottom Edge</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="hideLeft" type="CT_OnOff" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Hide Left Edge</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="hideRight" type="CT_OnOff" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Hide Right Edge</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="strikeH" type="CT_OnOff" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Border Box Strikethrough Horizontal</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="strikeV" type="CT_OnOff" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Border Box Strikethrough Vertical</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="strikeBLTR" type="CT_OnOff" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Border Box Strikethrough Bottom-Left to Top-Right</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="strikeTLBR" type="CT_OnOff" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Border Box Strikethrough Top-Left to Bottom-Right</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="ctrlPr" type="CT_CtrlPr" minOccurs="0"></xsd:element>
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:complexType name="CT_BorderBox">
+    <xsd:sequence>
+      <xsd:element name="borderBoxPr" type="CT_BorderBoxPr" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Border Box Properties</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="e" type="CT_OMathArg">
+        <xsd:annotation>
+          <xsd:documentation>Base</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:complexType name="CT_DPr">
+    <xsd:sequence>
+      <xsd:element name="begChr" type="CT_Char" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Delimiter Beginning Character</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="sepChr" type="CT_Char" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Delimiter Separator Character</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="endChr" type="CT_Char" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Delimiter Ending Character</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="grow" type="CT_OnOff" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Delimiter Grow</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="shp" type="CT_Shp" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Shape (Delimiters)</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="ctrlPr" type="CT_CtrlPr" minOccurs="0"></xsd:element>
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:complexType name="CT_D">
+    <xsd:sequence>
+      <xsd:element name="dPr" type="CT_DPr" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Delimiter Properties</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="e" type="CT_OMathArg" maxOccurs="unbounded">
+        <xsd:annotation>
+          <xsd:documentation>Base</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:complexType name="CT_EqArrPr">
+    <xsd:sequence>
+      <xsd:element name="baseJc" type="CT_YAlign" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Equation Array Base Justification</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="maxDist" type="CT_OnOff" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Maximum Distribution</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="objDist" type="CT_OnOff" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Object Distribution</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="rSpRule" type="CT_SpacingRule" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Row Spacing Rule</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="rSp" type="CT_UnSignedInteger" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Row Spacing (Equation Array)</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="ctrlPr" type="CT_CtrlPr" minOccurs="0"></xsd:element>
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:complexType name="CT_EqArr">
+    <xsd:sequence>
+      <xsd:element name="eqArrPr" type="CT_EqArrPr" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Equation Array Properties</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="e" type="CT_OMathArg" maxOccurs="unbounded">
+        <xsd:annotation>
+          <xsd:documentation>Element</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:complexType name="CT_FPr">
+    <xsd:sequence>
+      <xsd:element name="type" type="CT_FType" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Fraction type</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="ctrlPr" type="CT_CtrlPr" minOccurs="0"></xsd:element>
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:complexType name="CT_F">
+    <xsd:sequence>
+      <xsd:element name="fPr" type="CT_FPr" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Fraction Properties</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="num" type="CT_OMathArg">
+        <xsd:annotation>
+          <xsd:documentation>Numerator</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="den" type="CT_OMathArg">
+        <xsd:annotation>
+          <xsd:documentation>Denominator</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:complexType name="CT_FuncPr">
+    <xsd:sequence>
+      <xsd:element name="ctrlPr" type="CT_CtrlPr" minOccurs="0"></xsd:element>
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:complexType name="CT_Func">
+    <xsd:sequence>
+      <xsd:element name="funcPr" type="CT_FuncPr" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Function Properties</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="fName" type="CT_OMathArg">
+        <xsd:annotation>
+          <xsd:documentation>Function Name</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="e" type="CT_OMathArg">
+        <xsd:annotation>
+          <xsd:documentation>Base (Argument)</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:complexType name="CT_GroupChrPr">
+    <xsd:sequence>
+      <xsd:element name="chr" type="CT_Char" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Group Character (Grouping Character)</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="pos" type="CT_TopBot" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Position (Group Character)</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="vertJc" type="CT_TopBot" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Vertical Justification</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="ctrlPr" type="CT_CtrlPr" minOccurs="0"></xsd:element>
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:complexType name="CT_GroupChr">
+    <xsd:sequence>
+      <xsd:element name="groupChrPr" type="CT_GroupChrPr" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Group-Character Properties</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="e" type="CT_OMathArg">
+        <xsd:annotation>
+          <xsd:documentation>Base</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:complexType name="CT_LimLowPr">
+    <xsd:sequence>
+      <xsd:element name="ctrlPr" type="CT_CtrlPr" minOccurs="0"></xsd:element>
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:complexType name="CT_LimLow">
+    <xsd:sequence>
+      <xsd:element name="limLowPr" type="CT_LimLowPr" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Lower Limit Properties</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="e" type="CT_OMathArg">
+        <xsd:annotation>
+          <xsd:documentation>Base</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="lim" type="CT_OMathArg">
+        <xsd:annotation>
+          <xsd:documentation>Limit (Lower)</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:complexType name="CT_LimUppPr">
+    <xsd:sequence>
+      <xsd:element name="ctrlPr" type="CT_CtrlPr" minOccurs="0"></xsd:element>
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:complexType name="CT_LimUpp">
+    <xsd:sequence>
+      <xsd:element name="limUppPr" type="CT_LimUppPr" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Upper Limit Properties</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="e" type="CT_OMathArg">
+        <xsd:annotation>
+          <xsd:documentation>Base</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="lim" type="CT_OMathArg">
+        <xsd:annotation>
+          <xsd:documentation>Limit (Upper)</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:complexType name="CT_MCPr">
+    <xsd:sequence>
+      <xsd:element name="count" type="CT_Integer255" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Matrix Column Count</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="mcJc" type="CT_XAlign" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Matrix Column Justification</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:complexType name="CT_MC">
+    <xsd:sequence>
+      <xsd:element name="mcPr" type="CT_MCPr" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Matrix Column Properties</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:complexType name="CT_MCS">
+    <xsd:sequence>
+      <xsd:element name="mc" type="CT_MC" maxOccurs="unbounded">
+        <xsd:annotation>
+          <xsd:documentation>Matrix Column</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:complexType name="CT_MPr">
+    <xsd:sequence>
+      <xsd:element name="baseJc" type="CT_YAlign" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Matrix Base Justification</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="plcHide" type="CT_OnOff" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Hide Placeholders (Matrix)</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="rSpRule" type="CT_SpacingRule" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Row Spacing Rule</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="cGpRule" type="CT_SpacingRule" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Matrix Column Gap Rule</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="rSp" type="CT_UnSignedInteger" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Row Spacing (Matrix)</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="cSp" type="CT_UnSignedInteger" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Matrix Column Spacing</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="cGp" type="CT_UnSignedInteger" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Matrix Column Gap</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="mcs" type="CT_MCS" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Matrix Columns</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="ctrlPr" type="CT_CtrlPr" minOccurs="0"></xsd:element>
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:complexType name="CT_MR">
+    <xsd:sequence>
+      <xsd:element name="e" type="CT_OMathArg" maxOccurs="unbounded">
+        <xsd:annotation>
+          <xsd:documentation>Element</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:complexType name="CT_M">
+    <xsd:sequence>
+      <xsd:element name="mPr" type="CT_MPr" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Matrix Properties</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="mr" type="CT_MR" maxOccurs="unbounded">
+        <xsd:annotation>
+          <xsd:documentation>Matrix Row</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:complexType name="CT_NaryPr">
+    <xsd:sequence>
+      <xsd:element name="chr" type="CT_Char" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>n-ary Operator Character</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="limLoc" type="CT_LimLoc" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>n-ary Limit Location</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="grow" type="CT_OnOff" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>n-ary Grow</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="subHide" type="CT_OnOff" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Hide Subscript (n-ary)</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="supHide" type="CT_OnOff" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Hide Superscript (n-ary)</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="ctrlPr" type="CT_CtrlPr" minOccurs="0"></xsd:element>
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:complexType name="CT_Nary">
+    <xsd:sequence>
+      <xsd:element name="naryPr" type="CT_NaryPr" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>n-ary Properties</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="sub" type="CT_OMathArg">
+        <xsd:annotation>
+          <xsd:documentation>Lower limit (n-ary) </xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="sup" type="CT_OMathArg">
+        <xsd:annotation>
+          <xsd:documentation>Upper limit (n-ary)</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="e" type="CT_OMathArg">
+        <xsd:annotation>
+          <xsd:documentation>Base (Argument)</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:complexType name="CT_PhantPr">
+    <xsd:sequence>
+      <xsd:element name="show" type="CT_OnOff" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Phantom Show</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="zeroWid" type="CT_OnOff" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Phantom Zero Width</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="zeroAsc" type="CT_OnOff" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Phantom Zero Ascent</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="zeroDesc" type="CT_OnOff" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Phantom Zero Descent</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="transp" type="CT_OnOff" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Transparent (Phantom)</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="ctrlPr" type="CT_CtrlPr" minOccurs="0"></xsd:element>
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:complexType name="CT_Phant">
+    <xsd:sequence>
+      <xsd:element name="phantPr" type="CT_PhantPr" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Phantom Properties</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="e" type="CT_OMathArg">
+        <xsd:annotation>
+          <xsd:documentation>Base</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:complexType name="CT_RadPr">
+    <xsd:sequence>
+      <xsd:element name="degHide" type="CT_OnOff" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Hide Degree</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="ctrlPr" type="CT_CtrlPr" minOccurs="0"></xsd:element>
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:complexType name="CT_Rad">
+    <xsd:sequence>
+      <xsd:element name="radPr" type="CT_RadPr" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Radical Properties</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="deg" type="CT_OMathArg">
+        <xsd:annotation>
+          <xsd:documentation>Degree</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="e" type="CT_OMathArg">
+        <xsd:annotation>
+          <xsd:documentation>Base</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:complexType name="CT_SPrePr">
+    <xsd:sequence>
+      <xsd:element name="ctrlPr" type="CT_CtrlPr" minOccurs="0"></xsd:element>
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:complexType name="CT_SPre">
+    <xsd:sequence>
+      <xsd:element name="sPrePr" type="CT_SPrePr" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Pre-Sub-Superscript Properties</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="sub" type="CT_OMathArg">
+        <xsd:annotation>
+          <xsd:documentation>Subscript (Pre-Sub-Superscript)</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="sup" type="CT_OMathArg">
+        <xsd:annotation>
+          <xsd:documentation>Superscript(Pre-Sub-Superscript function)</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="e" type="CT_OMathArg">
+        <xsd:annotation>
+          <xsd:documentation>Base</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:complexType name="CT_SSubPr">
+    <xsd:sequence>
+      <xsd:element name="ctrlPr" type="CT_CtrlPr" minOccurs="0"></xsd:element>
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:complexType name="CT_SSub">
+    <xsd:sequence>
+      <xsd:element name="sSubPr" type="CT_SSubPr" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Subscript Properties</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="e" type="CT_OMathArg">
+        <xsd:annotation>
+          <xsd:documentation>Base</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="sub" type="CT_OMathArg">
+        <xsd:annotation>
+          <xsd:documentation>Subscript (Subscript function)</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:complexType name="CT_SSubSupPr">
+    <xsd:sequence>
+      <xsd:element name="alnScr" type="CT_OnOff" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Align Scripts</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="ctrlPr" type="CT_CtrlPr" minOccurs="0"></xsd:element>
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:complexType name="CT_SSubSup">
+    <xsd:sequence>
+      <xsd:element name="sSubSupPr" type="CT_SSubSupPr" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Sub-Superscript Properties</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="e" type="CT_OMathArg">
+        <xsd:annotation>
+          <xsd:documentation>Base</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="sub" type="CT_OMathArg">
+        <xsd:annotation>
+          <xsd:documentation>Subscript (Sub-Superscript)</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="sup" type="CT_OMathArg">
+        <xsd:annotation>
+          <xsd:documentation>Superscript (Sub-Superscript function)</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:complexType name="CT_SSupPr">
+    <xsd:sequence>
+      <xsd:element name="ctrlPr" type="CT_CtrlPr" minOccurs="0"></xsd:element>
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:complexType name="CT_SSup">
+    <xsd:sequence>
+      <xsd:element name="sSupPr" type="CT_SSupPr" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Superscript Properties</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="e" type="CT_OMathArg">
+        <xsd:annotation>
+          <xsd:documentation>Base</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="sup" type="CT_OMathArg">
+        <xsd:annotation>
+          <xsd:documentation>Superscript (Superscript function)</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:group name="EG_OMathMathElements">
+    <xsd:choice>
+      <xsd:element name="acc" type="CT_Acc">
+        <xsd:annotation>
+          <xsd:documentation>Accent</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="bar" type="CT_Bar">
+        <xsd:annotation>
+          <xsd:documentation>Bar</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="box" type="CT_Box">
+        <xsd:annotation>
+          <xsd:documentation>Box Function</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="borderBox" type="CT_BorderBox">
+        <xsd:annotation>
+          <xsd:documentation>Border-Box Function</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="d" type="CT_D">
+        <xsd:annotation>
+          <xsd:documentation>Delimiter Function</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="eqArr" type="CT_EqArr">
+        <xsd:annotation>
+          <xsd:documentation>Equation-Array Function</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="f" type="CT_F">
+        <xsd:annotation>
+          <xsd:documentation>Fraction Function</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="func" type="CT_Func">
+        <xsd:annotation>
+          <xsd:documentation>Function Apply Function</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="groupChr" type="CT_GroupChr">
+        <xsd:annotation>
+          <xsd:documentation>Group-Character Function</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="limLow" type="CT_LimLow">
+        <xsd:annotation>
+          <xsd:documentation>Lower-Limit Function</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="limUpp" type="CT_LimUpp">
+        <xsd:annotation>
+          <xsd:documentation>Upper-Limit Function</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="m" type="CT_M">
+        <xsd:annotation>
+          <xsd:documentation>Matrix Function</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="nary" type="CT_Nary">
+        <xsd:annotation>
+          <xsd:documentation>n-ary Operator Function</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="phant" type="CT_Phant">
+        <xsd:annotation>
+          <xsd:documentation>Phantom Function</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="rad" type="CT_Rad">
+        <xsd:annotation>
+          <xsd:documentation>Radical Function</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="sPre" type="CT_SPre">
+        <xsd:annotation>
+          <xsd:documentation>Pre-Sub-Superscript Function</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="sSub" type="CT_SSub">
+        <xsd:annotation>
+          <xsd:documentation>Subscript Function</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="sSubSup" type="CT_SSubSup">
+        <xsd:annotation>
+          <xsd:documentation>Sub-Superscript Function</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="sSup" type="CT_SSup">
+        <xsd:annotation>
+          <xsd:documentation>Superscript Function</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="r" type="CT_R">
+        <xsd:annotation>
+          <xsd:documentation>Run</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+    </xsd:choice>
+  </xsd:group>
+  <xsd:group name="EG_OMathElements">
+    <xsd:choice>
+      <xsd:group ref="EG_OMathMathElements" />
+      <xsd:group ref="w:EG_RunLevelElts" />
+    </xsd:choice>
+  </xsd:group>
+  <xsd:complexType name="CT_OMathArgPr">
+    <xsd:annotation>
+      <xsd:documentation>Math Argument Properties</xsd:documentation>
+    </xsd:annotation>
+    <xsd:sequence>
+      <xsd:element name="argSz" type="CT_Integer2" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Argument Size</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:complexType name="CT_OMathArg">
+    <xsd:sequence>
+      <xsd:element name="argPr" type="CT_OMathArgPr" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Argument Properties</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:group ref="EG_OMathElements" minOccurs="0" maxOccurs="unbounded" />
+      <xsd:element name="ctrlPr" type="CT_CtrlPr" minOccurs="0"></xsd:element>
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:simpleType name="ST_Jc">
+    <xsd:annotation>
+      <xsd:documentation>Justification</xsd:documentation>
+    </xsd:annotation>
+    <xsd:restriction base="xsd:string">
+      <xsd:enumeration value="left">
+        <xsd:annotation>
+          <xsd:documentation>Left Justification</xsd:documentation>
+        </xsd:annotation>
+      </xsd:enumeration>
+      <xsd:enumeration value="right">
+        <xsd:annotation>
+          <xsd:documentation>Right</xsd:documentation>
+        </xsd:annotation>
+      </xsd:enumeration>
+      <xsd:enumeration value="center">
+        <xsd:annotation>
+          <xsd:documentation>Center (Equation)</xsd:documentation>
+        </xsd:annotation>
+      </xsd:enumeration>
+      <xsd:enumeration value="centerGroup">
+        <xsd:annotation>
+          <xsd:documentation>Centered as Group (Equations)</xsd:documentation>
+        </xsd:annotation>
+      </xsd:enumeration>
+    </xsd:restriction>
+  </xsd:simpleType>
+  <xsd:complexType name="CT_OMathJc">
+    <xsd:attribute name="val" type="ST_Jc">
+      <xsd:annotation>
+        <xsd:documentation>Value</xsd:documentation>
+      </xsd:annotation>
+    </xsd:attribute>
+  </xsd:complexType>
+  <xsd:complexType name="CT_OMathParaPr">
+    <xsd:sequence>
+      <xsd:element name="jc" type="CT_OMathJc" minOccurs="0" maxOccurs="1">
+        <xsd:annotation>
+          <xsd:documentation>Justification</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:simpleType name="ST_TwipsMeasure">
+    <xsd:annotation>
+      <xsd:documentation>Twips measurement</xsd:documentation>
+    </xsd:annotation>
+    <xsd:restriction base="xsd:unsignedInt" />
+  </xsd:simpleType>
+  <xsd:complexType name="CT_TwipsMeasure">
+    <xsd:attribute name="val" type="ST_TwipsMeasure" use="required">
+      <xsd:annotation>
+        <xsd:documentation>Value</xsd:documentation>
+      </xsd:annotation>
+    </xsd:attribute>
+  </xsd:complexType>
+  <xsd:simpleType name="ST_BreakBin">
+    <xsd:annotation>
+      <xsd:documentation>Break Binary Operators</xsd:documentation>
+    </xsd:annotation>
+    <xsd:restriction base="xsd:string">
+      <xsd:enumeration value="before">
+        <xsd:annotation>
+          <xsd:documentation>Before</xsd:documentation>
+        </xsd:annotation>
+      </xsd:enumeration>
+      <xsd:enumeration value="after">
+        <xsd:annotation>
+          <xsd:documentation>After</xsd:documentation>
+        </xsd:annotation>
+      </xsd:enumeration>
+      <xsd:enumeration value="repeat">
+        <xsd:annotation>
+          <xsd:documentation>Repeat</xsd:documentation>
+        </xsd:annotation>
+      </xsd:enumeration>
+    </xsd:restriction>
+  </xsd:simpleType>
+  <xsd:complexType name="CT_BreakBin">
+    <xsd:attribute name="val" type="ST_BreakBin">
+      <xsd:annotation>
+        <xsd:documentation>Value</xsd:documentation>
+      </xsd:annotation>
+    </xsd:attribute>
+  </xsd:complexType>
+  <xsd:simpleType name="ST_BreakBinSub">
+    <xsd:annotation>
+      <xsd:documentation>Break on Binary Subtraction</xsd:documentation>
+    </xsd:annotation>
+    <xsd:restriction base="xsd:string">
+      <xsd:enumeration value="--">
+        <xsd:annotation>
+          <xsd:documentation>Minus Minus</xsd:documentation>
+        </xsd:annotation>
+      </xsd:enumeration>
+      <xsd:enumeration value="-+">
+        <xsd:annotation>
+          <xsd:documentation>Minus Plus</xsd:documentation>
+        </xsd:annotation>
+      </xsd:enumeration>
+      <xsd:enumeration value="+-">
+        <xsd:annotation>
+          <xsd:documentation>Plus Minus</xsd:documentation>
+        </xsd:annotation>
+      </xsd:enumeration>
+    </xsd:restriction>
+  </xsd:simpleType>
+  <xsd:complexType name="CT_BreakBinSub">
+    <xsd:attribute name="val" type="ST_BreakBinSub">
+      <xsd:annotation>
+        <xsd:documentation>Value</xsd:documentation>
+      </xsd:annotation>
+    </xsd:attribute>
+  </xsd:complexType>
+  <xsd:complexType name="CT_MathPr">
+    <xsd:sequence>
+      <xsd:element name="mathFont" type="CT_String" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Math Font</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="brkBin" type="CT_BreakBin" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Break on Binary Operators</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="brkBinSub" type="CT_BreakBinSub" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Break on Binary Subtraction</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="smallFrac" type="CT_OnOff" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Small Fraction</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="dispDef" type="CT_OnOff" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Use Display Math Defaults</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="lMargin" type="CT_TwipsMeasure" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Left Margin</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="rMargin" type="CT_TwipsMeasure" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Right Margin</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="defJc" type="CT_OMathJc" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Default Justification</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="preSp" type="CT_TwipsMeasure" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Pre-Equation Spacing</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="postSp" type="CT_TwipsMeasure" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Post-Equation Spacing</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="interSp" type="CT_TwipsMeasure" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Inter-Equation Spacing</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="intraSp" type="CT_TwipsMeasure" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Intra-Equation Spacing</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:choice minOccurs="0">
+        <xsd:element name="wrapIndent" type="CT_TwipsMeasure">
+          <xsd:annotation>
+            <xsd:documentation>Wrap Indent</xsd:documentation>
+          </xsd:annotation>
+        </xsd:element>
+        <xsd:element name="wrapRight" type="CT_OnOff">
+          <xsd:annotation>
+            <xsd:documentation>Wrap Right</xsd:documentation>
+          </xsd:annotation>
+        </xsd:element>
+      </xsd:choice>
+      <xsd:element name="intLim" type="CT_LimLoc" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>Integral Limit Locations</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="naryLim" type="CT_LimLoc" minOccurs="0">
+        <xsd:annotation>
+          <xsd:documentation>n-ary Limit Location</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:element name="mathPr" type="CT_MathPr">
+    <xsd:annotation>
+      <xsd:documentation>Math Properties</xsd:documentation>
+    </xsd:annotation>
+  </xsd:element>
+  <xsd:complexType name="CT_OMathPara">
+    <xsd:sequence>
+      <xsd:element name="oMathParaPr" type="CT_OMathParaPr" minOccurs="0" maxOccurs="1">
+        <xsd:annotation>
+          <xsd:documentation>Office Math Paragraph Properties</xsd:documentation>
+        </xsd:annotation>
+      </xsd:element>
+      <xsd:element name="oMath" type="CT_OMath" minOccurs="1" maxOccurs="unbounded">
+        <xsd:annotation>
+          <xsd:documentation>Office Math</xsd:documentation>
+        </xsd:annotation>
+        <xsd:unique name="uniqueContentAnchorIdsInsideMath">
+          <xsd:selector xpath="m:annotation/m:content" />
+          <xsd:field xpath="@id" />
+        </xsd:unique>
+        <xsd:unique name="uniqueContextAnchorIdsInsideMath">
+          <xsd:selector xpath="m:annotation/m:context" />
+          <xsd:field xpath="@id" />
+        </xsd:unique>
+      </xsd:element>
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:complexType name="CT_OMath">
+    <xsd:sequence>
+      <xsd:group ref="EG_OMathElements" minOccurs="0" maxOccurs="unbounded" />
+    </xsd:sequence>
+  </xsd:complexType>
+  <xsd:element name="oMathPara" type="CT_OMathPara">
+    <xsd:annotation>
+      <xsd:documentation>Math Paragraph</xsd:documentation>
+    </xsd:annotation>
+  </xsd:element>
+  <xsd:element name="oMath" type="CT_OMath"></xsd:element>
+</xsd:schema>
diff --git a/spec/fixtures/lutaml/xsd_schemas/unitsml-v1.0-csd04.xsd b/spec/fixtures/lutaml/xsd_schemas/unitsml-v1.0-csd04.xsd
new file mode 100644
index 00000000..b6f24858
--- /dev/null
+++ b/spec/fixtures/lutaml/xsd_schemas/unitsml-v1.0-csd04.xsd
@@ -0,0 +1,1335 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+   Units Markup language (UnitsML) Schema
+    Website: http://unitsml.nist.gov
+    Version History: http://unitsml.nist.gov/Schema/schema_changes.txt
+
+Copyright (C) OASIS Open 2006 - 2011. All Rights Reserved.
+
+All capitalized terms in the following text have the meanings
+assigned to them in the OASIS Intellectual Property Rights Policy
+(the "OASIS IPR Policy"). The full Policy may be found at the OASIS
+website.
+
+This document and translations of it may be copied and furnished
+to others, and derivative works that comment on or otherwise explain
+it or assist in its implementation may be prepared, copied, published,
+and distributed, in whole or in part, without restriction of any
+kind, provided that the above copyright notice and this section
+are included on all such copies and derivative works. However, this
+document itself may not be modified in any way, including by removing
+the copyright notice or references to OASIS, except as needed for
+the purpose of developing any document or deliverable produced by
+an OASIS Technical Committee (in which case the rules applicable
+to copyrights, as set forth in the OASIS IPR Policy, must be
+followed) or as required to translate it into languages other than
+English.
+
+The limited permissions granted above are perpetual and will not
+be revoked by OASIS or its successors or assigns.
+
+This document and the information contained herein is provided on
+an "AS IS" basis and OASIS DISCLAIMS ALL WARRANTIES, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF
+THE INFORMATION HEREIN WILL NOT INFRINGE ANY OWNERSHIP RIGHTS OR
+ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR
+PURPOSE.
+
+-->
+<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
+	xmlns="urn:oasis:names:tc:unitsml:schema:xsd:UnitsMLSchema-1.0" targetNamespace="urn:oasis:names:tc:unitsml:schema:xsd:UnitsMLSchema-1.0" elementFormDefault="qualified" attributeFormDefault="unqualified" version="1.0-CSD-04">
+	<xsd:import namespace="http://www.w3.org/XML/1998/namespace" schemaLocation="http://www.w3.org/2009/01/xml.xsd"/>
+	<!--=== Root-Node of an UnitsML document ===-->
+	<xsd:element name="UnitsML" type="UnitsMLType">
+		<xsd:annotation>
+			<xsd:documentation>Container for UnitsML units, quantities, and prefixes.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<xsd:complexType name="UnitsMLType">
+		<xsd:annotation>
+			<xsd:documentation>ComplexType for the root element of an UnitsML document.</xsd:documentation>
+		</xsd:annotation>
+		<xsd:sequence>
+			<xsd:element ref="UnitSet" minOccurs="0"/>
+			<xsd:element ref="CountedItemSet" minOccurs="0"/>
+			<xsd:element ref="QuantitySet" minOccurs="0"/>
+			<xsd:element ref="DimensionSet" minOccurs="0"/>
+			<xsd:element ref="PrefixSet" minOccurs="0"/>
+		</xsd:sequence>
+	</xsd:complexType>
+	<!--=== Global document elements ===-->
+	<!--     === Unit elements ===-->
+	<xsd:element name="UnitSet" type="UnitSetType">
+		<xsd:annotation>
+			<xsd:documentation>Container for units. Use in UnitsML container or directly incorporate into a host schema.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<xsd:element name="Unit" type="UnitType">
+		<xsd:annotation>
+			<xsd:documentation>Element for describing units. Use in containers UnitSet or directly incorporate into a host schema.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<xsd:element name="UnitSystem" type="SystemType">
+		<xsd:annotation>
+			<xsd:documentation>Container for describing the system of units.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<xsd:element name="UnitName" type="NameType">
+		<xsd:annotation>
+			<xsd:documentation>Element containing the unit name.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<xsd:element name="UnitSymbol" type="SymbolType">
+		<xsd:annotation>
+			<xsd:documentation>Element containing various unit symbols.  Examples include Aring (ASCII), Å (HTML).</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<xsd:element name="UnitVersionHistory" type="NoteType">
+		<xsd:annotation>
+			<xsd:documentation>Element for descriptive information, including version changes to the unit.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<xsd:element name="CodeListValue" type="CodeListValueType">
+		<xsd:annotation>
+			<xsd:documentation>Element for listing the unit code value from a specific code list.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<xsd:element name="RootUnits" type="RootUnitsType">
+		<xsd:annotation>
+			<xsd:documentation>Container for defining derived units in terms of their root units. This allows a precise definition of a wide range of units. The goal is to improve interoperability among applications and databases which use derived units based on commonly encountered root units.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<xsd:element name="EnumeratedRootUnit" type="EnumeratedRootUnitType">
+		<xsd:annotation>
+			<xsd:documentation>Element for a root unit (from an extensive enumerated list) allowing an optional prefix and power. E.g., mm^2</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<xsd:element name="ExternalRootUnit" type="ExternalRootUnitType">
+		<xsd:annotation>
+			<xsd:documentation>Element for those special cases where the root unit needed is not included in the enumerated list in the above element.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<xsd:element name="Conversions" type="ConversionsType">
+		<xsd:annotation>
+			<xsd:documentation>Container for providing conversion information to other units.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<xsd:element name="Float64ConversionFrom" type="Float64ConversionFromType">
+		<xsd:annotation>
+			<xsd:documentation>Element for providing factors for a conversion equation from another unit; y = d + ((b / c) (x + a))</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<xsd:element name="ConversionNote" type="NoteType">
+		<xsd:annotation>
+			<xsd:documentation>Element for descriptive information.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<xsd:element name="SpecialConversionFrom" type="SpecialConversionFromType">
+		<xsd:annotation>
+			<xsd:documentation>Element for providing unit conversion information for conversions that are more complex than the Float64ConversionFrom linear equation.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<xsd:element name="WSDLConversionFrom" type="WSDLConversionFromType">
+		<xsd:annotation>
+			<xsd:documentation>Element for providing conversion based on SOAP/WSDL calls to a remote server.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<xsd:element name="WSDLDescription" type="NoteType">
+		<xsd:annotation>
+			<xsd:documentation>Element to describe the WSDL service.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<xsd:element name="ConversionDescription" type="NoteType">
+		<xsd:annotation>
+			<xsd:documentation>Element for a description of the SpecialConversionFrom.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<xsd:element name="QuantityReference" type="ReferenceType">
+		<xsd:annotation>
+			<xsd:documentation>Element for all quantities that can be expressed using this unit.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<xsd:element name="UnitDefinition" type="DefinitionType">
+		<xsd:annotation>
+			<xsd:documentation>Element to describe the definition of the unit.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<xsd:element name="UnitHistory" type="HistoryType">
+		<xsd:annotation>
+			<xsd:documentation>Element to describe the historical development of the unit.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<xsd:element name="UnitRemark" type="RemarkType">
+		<xsd:annotation>
+			<xsd:documentation>Element as a placeholder for additional information.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<!--     === Counted item elements ===-->
+	<xsd:element name="CountedItemSet" type="CountedItemSetType">
+		<xsd:annotation>
+			<xsd:documentation>Container for items that are counted and are (in practice) combined with scientific units of measure.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<xsd:element name="CountedItem" type="CountedItemType">
+		<xsd:annotation>
+			<xsd:documentation>Container for a single counted item.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<xsd:element name="ItemName" type="NameType">
+		<xsd:annotation>
+			<xsd:documentation>Element containing the item name(s).</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<xsd:element name="ItemSymbol" type="SymbolType">
+		<xsd:annotation>
+			<xsd:documentation>Element containing symbols for the item.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<xsd:element name="ItemVersionHistory" type="NoteType">
+		<xsd:annotation>
+			<xsd:documentation>Element for descriptive information, including version changes to the item.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<xsd:element name="ItemDefinition" type="DefinitionType">
+		<xsd:annotation>
+			<xsd:documentation>Element to describe the definition of the item.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<xsd:element name="ItemHistory" type="HistoryType">
+		<xsd:annotation>
+			<xsd:documentation>Element to describe the historical development of the item.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<xsd:element name="ItemRemark" type="RemarkType">
+		<xsd:annotation>
+			<xsd:documentation>Element as a placeholder for additional information.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<!--     === Quantity elements ===-->
+	<xsd:element name="QuantitySet" type="QuantitySetType">
+		<xsd:annotation>
+			<xsd:documentation>Container for quantities.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<xsd:element name="Quantity" type="QuantityType">
+		<xsd:annotation>
+			<xsd:documentation>Element for describing quantities and referencing corresponding units. Use in container or directly incorporate into a host schema.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<xsd:element name="QuantityName" type="NameType">
+		<xsd:annotation>
+			<xsd:documentation>Element containing the quantity name.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<xsd:element name="QuantitySymbol" type="SymbolType">
+		<xsd:annotation>
+			<xsd:documentation>Element containing various quantity symbols.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<xsd:element name="UnitReference" type="ReferenceType">
+		<xsd:annotation>
+			<xsd:documentation>Element for referencing a unit of measure from within the Quantity element.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<xsd:element name="QuantityVersionHistory" type="NoteType">
+		<xsd:annotation>
+			<xsd:documentation>Element for descriptive information, including version changes to the unit.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<xsd:element name="QuantityDefinition" type="DefinitionType">
+		<xsd:annotation>
+			<xsd:documentation>Element to describe the definition of the quantity.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<xsd:element name="QuantityHistory" type="HistoryType">
+		<xsd:annotation>
+			<xsd:documentation>Element to describe the historical development of the quantity.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<xsd:element name="QuantityRemark" type="RemarkType">
+		<xsd:annotation>
+			<xsd:documentation>Element as a placeholder for additional information.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<!--     === Dimension elements ===-->
+	<xsd:element name="DimensionSet" type="DimensionSetType">
+		<xsd:annotation>
+			<xsd:documentation>Container for dimensions.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<xsd:element name="Dimension" type="DimensionType">
+		<xsd:annotation>
+			<xsd:documentation>Element to express the dimension of a unit or quantity in terms of the SI base quantities length, mass, time, electric current, thermodynamic temperature, amount of substance, and luminous intensity.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<xsd:element name="Length" type="LengthType">
+		<xsd:annotation>
+			<xsd:documentation>Element containing the dimension of the quantity length.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<xsd:element name="Mass" type="MassType">
+		<xsd:annotation>
+			<xsd:documentation>Element containing the dimension of the quantity mass.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<xsd:element name="Time" type="TimeType">
+		<xsd:annotation>
+			<xsd:documentation>Element containing the dimension of the quantity time.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<xsd:element name="ElectricCurrent" type="ElectricCurrentType">
+		<xsd:annotation>
+			<xsd:documentation>Element containing the dimension of the quantity electric current.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<xsd:element name="ThermodynamicTemperature" type="ThermodynamicTemperatureType">
+		<xsd:annotation>
+			<xsd:documentation>Element containing the dimension of the quantity thermodynamic temerature.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<xsd:element name="AmountOfSubstance" type="AmountOfSubstanceType">
+		<xsd:annotation>
+			<xsd:documentation>Element containing the dimension of the quantity amount of substance.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<xsd:element name="LuminousIntensity" type="LuminousIntensityType">
+		<xsd:annotation>
+			<xsd:documentation>Element containing the dimension of the quantity luminous intensity.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<xsd:element name="PlaneAngle" type="PlaneAngleType">
+		<xsd:annotation>
+			<xsd:documentation>Element containing the dimension of the quantity plane angle.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<xsd:element name="Item" type="ItemType">
+		<xsd:annotation>
+			<xsd:documentation>Element containing the dimension of any item. Note: this element is meant to be used to allow counted items to be included in the dimensioning of a derived quantity, e.g., electrons per time; usage of this element does not conform to the SI description of the dimension of a quantity in terms of seven base quantities.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<!--     === Prefix elements ===-->
+	<xsd:element name="PrefixSet" type="PrefixSetType">
+		<xsd:annotation>
+			<xsd:documentation>Container for prefixes.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<xsd:element name="Prefix" type="PrefixType">
+		<xsd:annotation>
+			<xsd:documentation>Element containing information about a prefix.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<xsd:element name="PrefixName" type="NameType">
+		<xsd:annotation>
+			<xsd:documentation>Element containing the prefix name.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<xsd:element name="PrefixSymbol" type="SymbolType">
+		<xsd:annotation>
+			<xsd:documentation>Element containing prefix symbols.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+	<!--=== Attribute groups (global) ===-->
+	<xsd:attributeGroup name="initialUnit">
+		<xsd:annotation>
+			<xsd:documentation>URI indicating the unitID of the starting unit for the conversion. For units which are defined in the same document, the URI should consist of a pound sign (#) followed by the ID value.</xsd:documentation>
+		</xsd:annotation>
+		<xsd:attribute name="initialUnit" type="xsd:anyURI" use="required">
+			<xsd:annotation>
+				<xsd:documentation>URI indicating the unitID of the starting unit for the conversion. For units which are defined in the same document, the URI should consist of a pound sign (#) followed by the ID value.</xsd:documentation>
+			</xsd:annotation>
+		</xsd:attribute>
+	</xsd:attributeGroup>
+	<xsd:attributeGroup name="sourceName">
+		<xsd:annotation>
+			<xsd:documentation>Name of relevant publication.</xsd:documentation>
+		</xsd:annotation>
+		<xsd:attribute name="sourceName" type="xsd:string" use="optional">
+			<xsd:annotation>
+				<xsd:documentation>Name of relevant publication.</xsd:documentation>
+			</xsd:annotation>
+		</xsd:attribute>
+	</xsd:attributeGroup>
+	<xsd:attributeGroup name="sourceURL">
+		<xsd:annotation>
+			<xsd:documentation>Relevant URL for available information.</xsd:documentation>
+		</xsd:annotation>
+		<xsd:attribute name="sourceURL" type="xsd:anyURI" use="optional">
+			<xsd:annotation>
+				<xsd:documentation>Relevant URL for available information.</xsd:documentation>
+			</xsd:annotation>
+		</xsd:attribute>
+	</xsd:attributeGroup>
+	<xsd:attributeGroup name="powerRational">
+		<xsd:annotation>
+			<xsd:documentation>An exponent of the unit, specified as powerNumerator and powerDenominator.</xsd:documentation>
+		</xsd:annotation>
+		<xsd:attribute name="powerNumerator" type="xsd:byte" use="optional" default="1">
+			<xsd:annotation>
+				<xsd:documentation>An integer exponent of the unit.</xsd:documentation>
+			</xsd:annotation>
+		</xsd:attribute>
+		<xsd:attribute name="powerDenominator" type="xsd:byte" use="optional" default="1">
+			<xsd:annotation>
+				<xsd:documentation>An integer value divided into the powerNumerator to create a non integer exponent of a unit.  For example 1/2.</xsd:documentation>
+			</xsd:annotation>
+		</xsd:attribute>
+	</xsd:attributeGroup>
+	<xsd:attributeGroup name="prefix">
+		<xsd:annotation>
+			<xsd:documentation>Prefix identifier; e.g., m, k, M, G.  [Enumeration order is by prefix magnitude (Y to y) followed by binary prefixes.]</xsd:documentation>
+		</xsd:annotation>
+		<xsd:attribute name="prefix">
+			<xsd:annotation>
+				<xsd:documentation>Prefix identifier; e.g., m, k, M, G.  [Enumeration order is by prefix magnitude (Y to y) followed by binary prefixes.]</xsd:documentation>
+			</xsd:annotation>
+			<xsd:simpleType>
+				<xsd:restriction base="xsd:token">
+					<xsd:enumeration value="Y"/>
+					<xsd:enumeration value="Z"/>
+					<xsd:enumeration value="E"/>
+					<xsd:enumeration value="P"/>
+					<xsd:enumeration value="T"/>
+					<xsd:enumeration value="G"/>
+					<xsd:enumeration value="M"/>
+					<xsd:enumeration value="k"/>
+					<xsd:enumeration value="h"/>
+					<xsd:enumeration value="da"/>
+					<xsd:enumeration value="d"/>
+					<xsd:enumeration value="c"/>
+					<xsd:enumeration value="m"/>
+					<xsd:enumeration value="u"/>
+					<xsd:enumeration value="n"/>
+					<xsd:enumeration value="p"/>
+					<xsd:enumeration value="f"/>
+					<xsd:enumeration value="a"/>
+					<xsd:enumeration value="z"/>
+					<xsd:enumeration value="y"/>
+					<xsd:enumeration value="Ki"/>
+					<xsd:enumeration value="Mi"/>
+					<xsd:enumeration value="Gi"/>
+					<xsd:enumeration value="Ti"/>
+					<xsd:enumeration value="Pi"/>
+					<xsd:enumeration value="Ei"/>
+					<xsd:enumeration value="Zi"/>
+					<xsd:enumeration value="Yi"/>
+				</xsd:restriction>
+			</xsd:simpleType>
+		</xsd:attribute>
+	</xsd:attributeGroup>
+	<xsd:attributeGroup name="dimensionURL">
+		<xsd:annotation>
+			<xsd:documentation>URL to a representation of the unit or quantity in terms of the 7 SI base dimensions.</xsd:documentation>
+		</xsd:annotation>
+		<xsd:attribute name="dimensionURL" type="xsd:anyURI">
+			<xsd:annotation>
+				<xsd:documentation>URL to a representation of the unit or quantity in terms of the 7 SI base dimensions.</xsd:documentation>
+			</xsd:annotation>
+		</xsd:attribute>
+	</xsd:attributeGroup>
+	<!--=== Type definitions ===-->
+	<!--     === Unit specific Types ===-->
+	<xsd:complexType name="UnitSetType">
+		<xsd:annotation>
+			<xsd:documentation>Type for the unit container.</xsd:documentation>
+		</xsd:annotation>
+		<xsd:sequence>
+			<xsd:element ref="Unit" maxOccurs="unbounded">
+				<xsd:annotation>
+					<xsd:documentation>Element for describing units. Use in containers UnitSet or directly incorporate into a host schema.</xsd:documentation>
+				</xsd:annotation>
+			</xsd:element>
+		</xsd:sequence>
+	</xsd:complexType>
+	<xsd:complexType name="UnitType">
+		<xsd:annotation>
+			<xsd:documentation>Type for the unit.</xsd:documentation>
+		</xsd:annotation>
+		<xsd:sequence>
+			<xsd:element ref="UnitSystem" minOccurs="0" maxOccurs="unbounded">
+				<xsd:annotation>
+					<xsd:documentation>Container for describing the system(s) of units.</xsd:documentation>
+				</xsd:annotation>
+			</xsd:element>
+			<xsd:element ref="UnitName" maxOccurs="unbounded"/>
+			<xsd:element ref="UnitSymbol" minOccurs="0" maxOccurs="unbounded"/>
+			<xsd:element ref="CodeListValue" minOccurs="0" maxOccurs="unbounded"/>
+			<xsd:element ref="RootUnits" minOccurs="0">
+				<xsd:annotation>
+					<xsd:documentation>Container for defining derived units in terms of their root units. This allows a precise definition of a wide range of units. The goal is to improve interoperability among applications and databases which use derived units based on commonly encountered root units.</xsd:documentation>
+				</xsd:annotation>
+			</xsd:element>
+			<xsd:element ref="Conversions" minOccurs="0"/>
+			<xsd:element ref="QuantityReference" minOccurs="0" maxOccurs="unbounded"/>
+			<xsd:element ref="UnitVersionHistory" minOccurs="0" maxOccurs="unbounded">
+				<xsd:annotation>
+					<xsd:documentation>Element for descriptive information, including version changes to the unit.</xsd:documentation>
+				</xsd:annotation>
+			</xsd:element>
+			<xsd:element ref="UnitDefinition" minOccurs="0" maxOccurs="unbounded"/>
+			<xsd:element ref="UnitHistory" minOccurs="0" maxOccurs="unbounded"/>
+			<xsd:element ref="UnitRemark" minOccurs="0" maxOccurs="unbounded"/>
+		</xsd:sequence>
+		<xsd:attribute ref="xml:id" use="required"/>
+		<xsd:attribute name="timeStamp" type="xsd:dateTime">
+			<xsd:annotation>
+				<xsd:documentation>Used to indicate the version of the unit output from the Units Database. Changes in the time-stamp are made if a substantive change has been made to the unit, such as a change in the unit definition or changes in conversion factors.</xsd:documentation>
+			</xsd:annotation>
+		</xsd:attribute>
+		<xsd:attributeGroup ref="dimensionURL">
+			<xsd:annotation>
+				<xsd:documentation>Reference to a representation of the unit or quantity in terms of the 7 SI base dimensions.</xsd:documentation>
+			</xsd:annotation>
+		</xsd:attributeGroup>
+	</xsd:complexType>
+	<xsd:complexType name="CodeListValueType">
+		<xsd:annotation>
+			<xsd:documentation>Type for the element for listing the unit code value from a specific code list.</xsd:documentation>
+		</xsd:annotation>
+		<xsd:attribute name="unitCodeValue" type="xsd:string" use="required">
+			<xsd:annotation>
+				<xsd:documentation>The code associated for this unit in a specific code list.</xsd:documentation>
+			</xsd:annotation>
+		</xsd:attribute>
+		<xsd:attribute name="codeListName" type="xsd:normalizedString">
+			<xsd:annotation>
+				<xsd:documentation>The name of the code list.</xsd:documentation>
+			</xsd:annotation>
+		</xsd:attribute>
+		<xsd:attribute name="codeListVersion" type="xsd:token">
+			<xsd:annotation>
+				<xsd:documentation>The version of the code list containing the unit code.</xsd:documentation>
+			</xsd:annotation>
+		</xsd:attribute>
+		<xsd:attribute name="locationURL" type="xsd:anyURI">
+			<xsd:annotation>
+				<xsd:documentation>Suggested retrieval location for this version of the code list.</xsd:documentation>
+			</xsd:annotation>
+		</xsd:attribute>
+		<xsd:attribute name="organizationName" type="xsd:normalizedString">
+			<xsd:annotation>
+				<xsd:documentation>Organization responsible for publication and/or maintenance of the code list.</xsd:documentation>
+			</xsd:annotation>
+		</xsd:attribute>
+		<xsd:attribute name="organizationURI" type="xsd:anyURI">
+			<xsd:annotation>
+				<xsd:documentation>URI for organization responsible for the code list.</xsd:documentation>
+			</xsd:annotation>
+		</xsd:attribute>
+		<xsd:attribute ref="xml:lang">
+			<xsd:annotation>
+				<xsd:documentation>Primary language of the element and/or its attributes. [See RFC 4646, RFC 4647 and ISO 639.]</xsd:documentation>
+			</xsd:annotation>
+		</xsd:attribute>
+	</xsd:complexType>
+	<xsd:complexType name="RootUnitsType">
+		<xsd:annotation>
+			<xsd:documentation>Type for the container for defining derived units in terms of their root units. This allows a precise definition of a wide range of units. The goal is to improve interoperability among applications and databases which use derived units based on commonly encountered base units.</xsd:documentation>
+		</xsd:annotation>
+		<xsd:sequence>
+			<xsd:element ref="EnumeratedRootUnit" minOccurs="0" maxOccurs="unbounded">
+				<xsd:annotation>
+					<xsd:documentation>Element for a root unit (from an extensive enumerated list) allowing an optional prefix and power. E.g., mm^2</xsd:documentation>
+				</xsd:annotation>
+			</xsd:element>
+			<xsd:element ref="ExternalRootUnit" minOccurs="0" maxOccurs="unbounded">
+				<xsd:annotation>
+					<xsd:documentation>Element for those special cases where the root unit needed is not included in the enumerated list in the above element.</xsd:documentation>
+				</xsd:annotation>
+			</xsd:element>
+		</xsd:sequence>
+	</xsd:complexType>
+	<xsd:complexType name="EnumeratedRootUnitType">
+		<xsd:annotation>
+			<xsd:documentation>Type for the element for a root unit (from an extensive enumerated list) allowing an optional prefix and power. E.g., mm^2</xsd:documentation>
+		</xsd:annotation>
+		<xsd:attribute name="unit" use="required">
+			<xsd:annotation>
+				<xsd:documentation>Unit identifier; the enumerated list is basically English unit names in lowercase, with a few upper case exceptions, e.g., 32F, mmHg, pH.</xsd:documentation>
+			</xsd:annotation>
+			<xsd:simpleType>
+				<xsd:restriction base="xsd:token">
+					<xsd:enumeration value="meter"/>
+					<xsd:enumeration value="gram"/>
+					<xsd:enumeration value="second"/>
+					<xsd:enumeration value="ampere"/>
+					<xsd:enumeration value="kelvin"/>
+					<xsd:enumeration value="mole"/>
+					<xsd:enumeration value="candela"/>
+					<xsd:enumeration value="radian"/>
+					<xsd:enumeration value="steradian"/>
+					<xsd:enumeration value="hertz"/>
+					<xsd:enumeration value="newton"/>
+					<xsd:enumeration value="pascal"/>
+					<xsd:enumeration value="joule"/>
+					<xsd:enumeration value="watt"/>
+					<xsd:enumeration value="coulomb"/>
+					<xsd:enumeration value="volt"/>
+					<xsd:enumeration value="farad"/>
+					<xsd:enumeration value="ohm"/>
+					<xsd:enumeration value="siemens"/>
+					<xsd:enumeration value="weber"/>
+					<xsd:enumeration value="tesla"/>
+					<xsd:enumeration value="henry"/>
+					<xsd:enumeration value="degree_Celsius"/>
+					<xsd:enumeration value="lumen"/>
+					<xsd:enumeration value="lux"/>
+					<xsd:enumeration value="katal"/>
+					<xsd:enumeration value="becquerel"/>
+					<xsd:enumeration value="gray"/>
+					<xsd:enumeration value="sievert"/>
+					<xsd:enumeration value="minute"/>
+					<xsd:enumeration value="hour"/>
+					<xsd:enumeration value="day"/>
+					<xsd:enumeration value="arc_degree"/>
+					<xsd:enumeration value="arc_minute"/>
+					<xsd:enumeration value="arc_second"/>
+					<xsd:enumeration value="liter"/>
+					<xsd:enumeration value="metric_ton"/>
+					<xsd:enumeration value="electronvolt"/>
+					<xsd:enumeration value="unified_atomic_mass_unit"/>
+					<xsd:enumeration value="astronomical_unit"/>
+					<xsd:enumeration value="atomic_unit_of_1st_hyperpolarizability"/>
+					<xsd:enumeration value="atomic_unit_of_2nd_hyperpolarizability"/>
+					<xsd:enumeration value="atomic_unit_of_action"/>
+					<xsd:enumeration value="atomic_unit_of_charge"/>
+					<xsd:enumeration value="atomic_unit_of_charge_density"/>
+					<xsd:enumeration value="atomic_unit_of_current"/>
+					<xsd:enumeration value="atomic_unit_of_electric_dipole_moment"/>
+					<xsd:enumeration value="atomic_unit_of_electric_field"/>
+					<xsd:enumeration value="atomic_unit_of_electric_field_gradient"/>
+					<xsd:enumeration value="atomic_unit_of_electric_polarizability"/>
+					<xsd:enumeration value="atomic_unit_of_electric_potential"/>
+					<xsd:enumeration value="atomic_unit_of_electric_quadrupole_moment"/>
+					<xsd:enumeration value="atomic_unit_of_energy"/>
+					<xsd:enumeration value="atomic_unit_of_force"/>
+					<xsd:enumeration value="atomic_unit_of_length"/>
+					<xsd:enumeration value="atomic_unit_of_magnetic_dipole_moment"/>
+					<xsd:enumeration value="atomic_unit_of_magnetic_flux_density"/>
+					<xsd:enumeration value="atomic_unit_of_magnetizability"/>
+					<xsd:enumeration value="atomic_unit_of_mass"/>
+					<xsd:enumeration value="atomic_unit_of_momentum"/>
+					<xsd:enumeration value="atomic_unit_of_permittivity"/>
+					<xsd:enumeration value="atomic_unit_of_time"/>
+					<xsd:enumeration value="atomic_unit_of_velocity"/>
+					<xsd:enumeration value="natural_unit_of_action"/>
+					<xsd:enumeration value="natural_unit_of_action_in_eV_s"/>
+					<xsd:enumeration value="natural_unit_of_energy"/>
+					<xsd:enumeration value="natural_unit_of_energy_in_MeV"/>
+					<xsd:enumeration value="natural_unit_of_length"/>
+					<xsd:enumeration value="natural_unit_of_mass"/>
+					<xsd:enumeration value="natural_unit_of_momentum"/>
+					<xsd:enumeration value="natural_unit_of_momentum_in_MeV_per_c"/>
+					<xsd:enumeration value="natural_unit_of_time"/>
+					<xsd:enumeration value="natural_unit_of_velocity"/>
+					<xsd:enumeration value="nautical_mile"/>
+					<xsd:enumeration value="knot"/>
+					<xsd:enumeration value="angstrom"/>
+					<xsd:enumeration value="are"/>
+					<xsd:enumeration value="hectare"/>
+					<xsd:enumeration value="barn"/>
+					<xsd:enumeration value="bar"/>
+					<xsd:enumeration value="gal"/>
+					<xsd:enumeration value="curie"/>
+					<xsd:enumeration value="roentgen"/>
+					<xsd:enumeration value="rad"/>
+					<xsd:enumeration value="rem"/>
+					<xsd:enumeration value="erg"/>
+					<xsd:enumeration value="dyne"/>
+					<xsd:enumeration value="barye"/>
+					<xsd:enumeration value="poise"/>
+					<xsd:enumeration value="rhe"/>
+					<xsd:enumeration value="stokes"/>
+					<xsd:enumeration value="darcy"/>
+					<xsd:enumeration value="kayser"/>
+					<xsd:enumeration value="lambert"/>
+					<xsd:enumeration value="phot"/>
+					<xsd:enumeration value="thermo_calorie"/>
+					<xsd:enumeration value="table_calorie"/>
+					<xsd:enumeration value="debye"/>
+					<xsd:enumeration value="abampere"/>
+					<xsd:enumeration value="abcoulomb"/>
+					<xsd:enumeration value="abfarad"/>
+					<xsd:enumeration value="abhenry"/>
+					<xsd:enumeration value="abohm"/>
+					<xsd:enumeration value="abmho"/>
+					<xsd:enumeration value="abvolt"/>
+					<xsd:enumeration value="abwatt"/>
+					<xsd:enumeration value="maxwell"/>
+					<xsd:enumeration value="gauss"/>
+					<xsd:enumeration value="gilbert"/>
+					<xsd:enumeration value="oersted"/>
+					<xsd:enumeration value="stilb"/>
+					<xsd:enumeration value="statampere"/>
+					<xsd:enumeration value="statcoulomb"/>
+					<xsd:enumeration value="statfarad"/>
+					<xsd:enumeration value="stathenry"/>
+					<xsd:enumeration value="statohm"/>
+					<xsd:enumeration value="statmho"/>
+					<xsd:enumeration value="statvolt"/>
+					<xsd:enumeration value="statwatt"/>
+					<xsd:enumeration value="statweber"/>
+					<xsd:enumeration value="stattesla"/>
+					<xsd:enumeration value="long_ton"/>
+					<xsd:enumeration value="short_ton"/>
+					<xsd:enumeration value="gross_hundredweight"/>
+					<xsd:enumeration value="hundredweight"/>
+					<xsd:enumeration value="av_pound"/>
+					<xsd:enumeration value="av_ounce"/>
+					<xsd:enumeration value="av_dram"/>
+					<xsd:enumeration value="troy_pound"/>
+					<xsd:enumeration value="troy_ounce"/>
+					<xsd:enumeration value="pennyweight"/>
+					<xsd:enumeration value="apothecaries_dram"/>
+					<xsd:enumeration value="scruple"/>
+					<xsd:enumeration value="grain"/>
+					<xsd:enumeration value="slug"/>
+					<xsd:enumeration value="pound_force"/>
+					<xsd:enumeration value="poundal"/>
+					<xsd:enumeration value="kip"/>
+					<xsd:enumeration value="ton_force"/>
+					<xsd:enumeration value="gram_force"/>
+					<xsd:enumeration value="inch"/>
+					<xsd:enumeration value="foot"/>
+					<xsd:enumeration value="yard"/>
+					<xsd:enumeration value="mile"/>
+					<xsd:enumeration value="us_survey_inch"/>
+					<xsd:enumeration value="us_survey_foot"/>
+					<xsd:enumeration value="us_survey_yard"/>
+					<xsd:enumeration value="us_survey_fathom"/>
+					<xsd:enumeration value="us_survey_rod"/>
+					<xsd:enumeration value="us_survey_chain"/>
+					<xsd:enumeration value="us_survey_link"/>
+					<xsd:enumeration value="us_survey_furlong"/>
+					<xsd:enumeration value="us_survey_mile"/>
+					<xsd:enumeration value="us_acre"/>
+					<xsd:enumeration value="imperial_gallon"/>
+					<xsd:enumeration value="imperial_quart"/>
+					<xsd:enumeration value="imperial_pint"/>
+					<xsd:enumeration value="imperial_gill"/>
+					<xsd:enumeration value="imperial_ounce"/>
+					<xsd:enumeration value="us_gallon"/>
+					<xsd:enumeration value="us_quart"/>
+					<xsd:enumeration value="us_pint"/>
+					<xsd:enumeration value="us_cup"/>
+					<xsd:enumeration value="us_gill"/>
+					<xsd:enumeration value="us_fluid_ounce"/>
+					<xsd:enumeration value="us_fluid_dram"/>
+					<xsd:enumeration value="us_minim"/>
+					<xsd:enumeration value="us_tablespoon"/>
+					<xsd:enumeration value="us_teaspoon"/>
+					<xsd:enumeration value="us_bushel"/>
+					<xsd:enumeration value="us_peck"/>
+					<xsd:enumeration value="us_dry_quart"/>
+					<xsd:enumeration value="us_dry_pint"/>
+					<xsd:enumeration value="thermo_kg_calorie"/>
+					<xsd:enumeration value="table_kg_calorie"/>
+					<xsd:enumeration value="us_label_teaspoon"/>
+					<xsd:enumeration value="us_label_tablespoon"/>
+					<xsd:enumeration value="us_label_cup"/>
+					<xsd:enumeration value="us_label_fluid_ounce"/>
+					<xsd:enumeration value="us_label_ounce"/>
+					<xsd:enumeration value="horsepower"/>
+					<xsd:enumeration value="electric_horsepower"/>
+					<xsd:enumeration value="boiler_horsepower"/>
+					<xsd:enumeration value="metric_horsepower"/>
+					<xsd:enumeration value="water_horsepower"/>
+					<xsd:enumeration value="uk_horsepower"/>
+					<xsd:enumeration value="degree_Fahrenheit"/>
+					<xsd:enumeration value="degree_Rankine"/>
+					<xsd:enumeration value="torr"/>
+					<xsd:enumeration value="standard_atmosphere"/>
+					<xsd:enumeration value="technical_atmosphere"/>
+					<xsd:enumeration value="mm_Hg"/>
+					<xsd:enumeration value="cm_Hg"/>
+					<xsd:enumeration value="0C_cm_Hg"/>
+					<xsd:enumeration value="in_Hg"/>
+					<xsd:enumeration value="32F_in_Hg"/>
+					<xsd:enumeration value="60F_in_Hg"/>
+					<xsd:enumeration value="ft_Hg"/>
+					<xsd:enumeration value="mm_water"/>
+					<xsd:enumeration value="cm_water"/>
+					<xsd:enumeration value="4C_cm_water"/>
+					<xsd:enumeration value="in_water"/>
+					<xsd:enumeration value="39F_in_water"/>
+					<xsd:enumeration value="60F_in_water"/>
+					<xsd:enumeration value="ft_water"/>
+					<xsd:enumeration value="39F_ft_water"/>
+					<xsd:enumeration value="light_year"/>
+					<xsd:enumeration value="light_week"/>
+					<xsd:enumeration value="light_hour"/>
+					<xsd:enumeration value="light_minute"/>
+					<xsd:enumeration value="light_second"/>
+					<xsd:enumeration value="parsec"/>
+					<xsd:enumeration value="printers_pica"/>
+					<xsd:enumeration value="computer_pica"/>
+					<xsd:enumeration value="printers_point"/>
+					<xsd:enumeration value="computer_point"/>
+					<xsd:enumeration value="thermo_btu"/>
+					<xsd:enumeration value="table_btu"/>
+					<xsd:enumeration value="mean_btu"/>
+					<xsd:enumeration value="39F_btu"/>
+					<xsd:enumeration value="59F_btu"/>
+					<xsd:enumeration value="60F_btu"/>
+					<xsd:enumeration value="tons_of_tnt"/>
+					<xsd:enumeration value="ec_therm"/>
+					<xsd:enumeration value="us_therm"/>
+					<xsd:enumeration value="year_365"/>
+					<xsd:enumeration value="tropical_year"/>
+					<xsd:enumeration value="sidereal_year"/>
+					<xsd:enumeration value="sidereal_day"/>
+					<xsd:enumeration value="sidereal_hour"/>
+					<xsd:enumeration value="sidereal_minute"/>
+					<xsd:enumeration value="sidereal_second"/>
+					<xsd:enumeration value="shake"/>
+					<xsd:enumeration value="denier"/>
+					<xsd:enumeration value="tex"/>
+					<xsd:enumeration value="gon"/>
+					<xsd:enumeration value="nato_mil"/>
+					<xsd:enumeration value="pound_mole"/>
+					<xsd:enumeration value="ton_refrigeration"/>
+					<xsd:enumeration value="circular_mil"/>
+					<xsd:enumeration value="bel"/>
+					<xsd:enumeration value="neper"/>
+					<xsd:enumeration value="pH"/>
+					<xsd:enumeration value="petro_barrel"/>
+					<xsd:enumeration value="footlambert"/>
+					<xsd:enumeration value="footcandle"/>
+					<xsd:enumeration value="carat"/>
+					<xsd:enumeration value="bit"/>
+					<xsd:enumeration value="byte"/>
+				</xsd:restriction>
+			</xsd:simpleType>
+		</xsd:attribute>
+		<xsd:attributeGroup ref="sourceURL"/>
+		<xsd:attributeGroup ref="prefix">
+			<xsd:annotation>
+				<xsd:documentation>Prefix identifier; e.g., m, k, M, G. [Enumeration order is by prefix magnitude (Y to y) followed by binary prefixes.]</xsd:documentation>
+			</xsd:annotation>
+		</xsd:attributeGroup>
+		<xsd:attributeGroup ref="powerRational"/>
+	</xsd:complexType>
+	<xsd:complexType name="ExternalRootUnitType">
+		<xsd:annotation>
+			<xsd:documentation>Type for the element for those special cases where the root unit needed is not included in the enumerated list in the above element.</xsd:documentation>
+		</xsd:annotation>
+		<xsd:attribute name="unit" type="xsd:anyURI" use="required">
+			<xsd:annotation>
+				<xsd:documentation>URI to identify the unit.</xsd:documentation>
+			</xsd:annotation>
+		</xsd:attribute>
+		<xsd:attributeGroup ref="sourceURL">
+			<xsd:annotation>
+				<xsd:documentation>URI identifying the source and possibly the definition of the unit.</xsd:documentation>
+			</xsd:annotation>
+		</xsd:attributeGroup>
+		<xsd:attribute name="annotation" type="xsd:string">
+			<xsd:annotation>
+				<xsd:documentation>Optional unit annotation; e.g., a unit name if the unit identifier above is an uncommon code.</xsd:documentation>
+			</xsd:annotation>
+		</xsd:attribute>
+		<xsd:attribute ref="xml:lang"/>
+		<xsd:attributeGroup ref="prefix"/>
+		<xsd:attributeGroup ref="powerRational"/>
+	</xsd:complexType>
+	<xsd:complexType name="ConversionsType">
+		<xsd:annotation>
+			<xsd:documentation>Type for the container for providing conversion information to other units.</xsd:documentation>
+		</xsd:annotation>
+		<xsd:sequence>
+			<xsd:element ref="Float64ConversionFrom" minOccurs="0" maxOccurs="unbounded">
+				<xsd:annotation>
+					<xsd:documentation>Element for providing factors for a conversion equation from another unit; y = d + ((b / c) (x + a)). Note: The related "conversion to" equation is a simple inversion of the above equation; i.e., x = ((c / b) (y - d)) - a.</xsd:documentation>
+				</xsd:annotation>
+			</xsd:element>
+			<xsd:element ref="SpecialConversionFrom" minOccurs="0" maxOccurs="unbounded">
+				<xsd:annotation>
+					<xsd:documentation>Element for describing a conversion that cannot be described by the linear expression in the element Float64ConversionFrom.</xsd:documentation>
+				</xsd:annotation>
+			</xsd:element>
+			<xsd:element ref="WSDLConversionFrom" minOccurs="0" maxOccurs="unbounded">
+				<xsd:annotation>
+					<xsd:documentation>Element for providing conversion based on SOAP/WSDL calls to a remote server.</xsd:documentation>
+				</xsd:annotation>
+			</xsd:element>
+		</xsd:sequence>
+	</xsd:complexType>
+	<xsd:complexType name="Float64ConversionFromType">
+		<xsd:annotation>
+			<xsd:documentation>Type for the element for providing factors for a conversion equation from another unit; y = d + ((b / c) (x + a))</xsd:documentation>
+		</xsd:annotation>
+		<xsd:sequence>
+			<xsd:element ref="ConversionNote" minOccurs="0" maxOccurs="unbounded"/>
+		</xsd:sequence>
+		<xsd:attribute ref="xml:id" use="required"/>
+		<xsd:attributeGroup ref="initialUnit"/>
+		<xsd:attribute name="initialAddend" type="xsd:double" default="0">
+			<xsd:annotation>
+				<xsd:documentation>Number to be added at the start of the conversion (prior to multiplication or division) [factor 'a' in equation].</xsd:documentation>
+			</xsd:annotation>
+		</xsd:attribute>
+		<xsd:attribute name="initialAddendDecimalPlace" type="xsd:byte">
+			<xsd:annotation>
+				<xsd:documentation>Indicates the position of the least
+significant digit (in decimal) of
+the initialAddend; the position of
+this digit is given by ten to
+additive inverse of this number.</xsd:documentation>
+			</xsd:annotation>
+		</xsd:attribute>
+		<xsd:attribute name="multiplicand" type="xsd:double" default="1">
+			<xsd:annotation>
+				<xsd:documentation>Number by which to multiply sum of initial addend and initial value [factor 'b' in equation].</xsd:documentation>
+			</xsd:annotation>
+		</xsd:attribute>
+		<xsd:attribute name="multiplicandDigits" type="xsd:unsignedByte">
+			<xsd:annotation>
+				<xsd:documentation>Number of significant digits in the multiplicand value.</xsd:documentation>
+			</xsd:annotation>
+		</xsd:attribute>
+		<xsd:attribute name="divisor" type="xsd:double" default="1">
+			<xsd:annotation>
+				<xsd:documentation>Divisor to be applied to the value at the same time as the multiplicand [factor 'c' in equation].</xsd:documentation>
+			</xsd:annotation>
+		</xsd:attribute>
+		<xsd:attribute name="divisorDigits" type="xsd:unsignedByte">
+			<xsd:annotation>
+				<xsd:documentation>Number of significant digits in the divisor value.</xsd:documentation>
+			</xsd:annotation>
+		</xsd:attribute>
+		<xsd:attribute name="finalAddend" type="xsd:double" default="0">
+			<xsd:annotation>
+				<xsd:documentation>Number to be added at the end of the conversion [factor 'd' in equation].</xsd:documentation>
+			</xsd:annotation>
+		</xsd:attribute>
+		<xsd:attribute name="finalAddendDecimalPlace" type="xsd:byte">
+			<xsd:annotation>
+				<xsd:documentation>Indicates the position of the least
+significant digit (in decimal) of
+the finalAddend; the position of
+this digit is given by ten to
+additive inverse of this number.</xsd:documentation>
+			</xsd:annotation>
+		</xsd:attribute>
+		<xsd:attribute name="exact" type="xsd:boolean" default="false">
+			<xsd:annotation>
+				<xsd:documentation>Indicates if the conversion is exact.</xsd:documentation>
+			</xsd:annotation>
+		</xsd:attribute>
+	</xsd:complexType>
+	<xsd:complexType name="SpecialConversionFromType">
+		<xsd:annotation>
+			<xsd:documentation>Type for the element for providing unit conversion information for conversions that are more complex than the Float64ConversionFrom linear equation.</xsd:documentation>
+		</xsd:annotation>
+		<xsd:sequence>
+			<xsd:element ref="ConversionDescription" minOccurs="0" maxOccurs="unbounded">
+				<xsd:annotation>
+					<xsd:documentation>Description of the conversion.</xsd:documentation>
+				</xsd:annotation>
+			</xsd:element>
+		</xsd:sequence>
+		<xsd:attribute ref="xml:id" use="required"/>
+		<xsd:attribute name="conversionURL" type="xsd:anyURI">
+			<xsd:annotation>
+				<xsd:documentation>URL for external description of the conversion or for an online convertor.</xsd:documentation>
+			</xsd:annotation>
+		</xsd:attribute>
+		<xsd:attributeGroup ref="initialUnit"/>
+	</xsd:complexType>
+	<xsd:complexType name="WSDLConversionFromType">
+		<xsd:annotation>
+			<xsd:documentation>Type for the element for providing unit conversion information for conversions that are more complex than the Float64ConversionFrom linear equation.</xsd:documentation>
+		</xsd:annotation>
+		<xsd:sequence>
+			<xsd:element ref="WSDLDescription" minOccurs="0" maxOccurs="unbounded">
+				<xsd:annotation>
+					<xsd:documentation>Description of the service.</xsd:documentation>
+				</xsd:annotation>
+			</xsd:element>
+		</xsd:sequence>
+		<xsd:attribute ref="xml:id" use="required"/>
+		<xsd:attributeGroup ref="initialUnit"/>
+		<xsd:attribute name="wsdlURL" type="xsd:anyURI" use="required">
+			<xsd:annotation>
+				<xsd:documentation>URL for external WSDL definition file.</xsd:documentation>
+			</xsd:annotation>
+		</xsd:attribute>
+	</xsd:complexType>
+	<!--     === CountedItem specific Types ===-->
+	<xsd:complexType name="CountedItemSetType">
+		<xsd:annotation>
+			<xsd:documentation>Type for a set of counted items.</xsd:documentation>
+		</xsd:annotation>
+		<xsd:sequence>
+			<xsd:element ref="CountedItem" maxOccurs="unbounded"/>
+		</xsd:sequence>
+	</xsd:complexType>
+	<xsd:complexType name="CountedItemType">
+		<xsd:annotation>
+			<xsd:documentation>Type for a single counted item.</xsd:documentation>
+		</xsd:annotation>
+		<xsd:sequence>
+			<xsd:element ref="ItemName" maxOccurs="unbounded"/>
+			<xsd:element ref="ItemSymbol" minOccurs="0" maxOccurs="unbounded"/>
+			<xsd:element ref="ItemVersionHistory" minOccurs="0" maxOccurs="unbounded"/>
+			<xsd:element ref="ItemDefinition" minOccurs="0" maxOccurs="unbounded"/>
+			<xsd:element ref="ItemHistory" minOccurs="0" maxOccurs="unbounded"/>
+			<xsd:element ref="ItemRemark" minOccurs="0" maxOccurs="unbounded"/>
+		</xsd:sequence>
+		<xsd:attribute ref="xml:id" use="required"/>
+	</xsd:complexType>
+	<!--     === Quantity specific Types ===-->
+	<xsd:complexType name="QuantitySetType">
+		<xsd:annotation>
+			<xsd:documentation>Type for quantity container.</xsd:documentation>
+		</xsd:annotation>
+		<xsd:sequence>
+			<xsd:element ref="Quantity" maxOccurs="unbounded"/>
+		</xsd:sequence>
+	</xsd:complexType>
+	<xsd:complexType name="QuantityType">
+		<xsd:annotation>
+			<xsd:documentation>Type for the quantity.</xsd:documentation>
+		</xsd:annotation>
+		<xsd:sequence>
+			<xsd:element ref="QuantityName" maxOccurs="unbounded"/>
+			<xsd:element ref="QuantitySymbol" minOccurs="0" maxOccurs="unbounded">
+				<xsd:annotation>
+					<xsd:documentation>Element containing various quantity symbols.</xsd:documentation>
+				</xsd:annotation>
+			</xsd:element>
+			<xsd:element ref="UnitReference" minOccurs="0" maxOccurs="unbounded">
+				<xsd:annotation>
+					<xsd:documentation>Element for specifying particular units associated with the quantity.</xsd:documentation>
+				</xsd:annotation>
+			</xsd:element>
+			<xsd:element ref="QuantityVersionHistory" minOccurs="0" maxOccurs="unbounded">
+				<xsd:annotation>
+					<xsd:documentation>Element for descriptive information, including version changes to the quantity.</xsd:documentation>
+				</xsd:annotation>
+			</xsd:element>
+			<xsd:element ref="QuantityDefinition" minOccurs="0" maxOccurs="unbounded"/>
+			<xsd:element ref="QuantityHistory" minOccurs="0" maxOccurs="unbounded"/>
+			<xsd:element ref="QuantityRemark" minOccurs="0" maxOccurs="unbounded"/>
+		</xsd:sequence>
+		<xsd:attribute ref="xml:id" use="required"/>
+		<xsd:attribute name="quantityType" use="optional">
+			<xsd:annotation>
+				<xsd:documentation>Type of the quantity.  For example base or derived.</xsd:documentation>
+			</xsd:annotation>
+			<xsd:simpleType>
+				<xsd:restriction base="xsd:token">
+					<xsd:enumeration value="base"/>
+					<xsd:enumeration value="derived"/>
+				</xsd:restriction>
+			</xsd:simpleType>
+			<!-- REVISE -->
+		</xsd:attribute>
+		<xsd:attributeGroup ref="dimensionURL"/>
+	</xsd:complexType>
+	<!--     === Dimension specific Types ===-->
+	<xsd:complexType name="DimensionSetType">
+		<xsd:annotation>
+			<xsd:documentation>Type for the dimension container.</xsd:documentation>
+		</xsd:annotation>
+		<xsd:sequence>
+			<xsd:element ref="Dimension" maxOccurs="unbounded">
+				<xsd:annotation>
+					<xsd:documentation>Element to express a unit or quantity in terms of the SI base quantities length, mass, time, electric current, thermodynamic temperature, amount of substance, and luminous intensity.</xsd:documentation>
+				</xsd:annotation>
+			</xsd:element>
+		</xsd:sequence>
+	</xsd:complexType>
+	<xsd:complexType name="DimensionType">
+		<xsd:annotation>
+			<xsd:documentation>Type for dimension.</xsd:documentation>
+		</xsd:annotation>
+		<xsd:sequence maxOccurs="unbounded">
+			<xsd:annotation>
+				<xsd:documentation>This unbounded sequence allows any order of any number of elements; e.g., L^1 · L^-1.</xsd:documentation>
+			</xsd:annotation>
+			<xsd:element ref="Length" minOccurs="0"/>
+			<xsd:element ref="Mass" minOccurs="0"/>
+			<xsd:element ref="Time" minOccurs="0"/>
+			<xsd:element ref="ElectricCurrent" minOccurs="0"/>
+			<xsd:element ref="ThermodynamicTemperature" minOccurs="0"/>
+			<xsd:element ref="AmountOfSubstance" minOccurs="0"/>
+			<xsd:element ref="LuminousIntensity" minOccurs="0"/>
+			<xsd:element ref="PlaneAngle" minOccurs="0"/>
+			<xsd:element ref="Item" minOccurs="0" maxOccurs="unbounded">
+				<xsd:annotation>
+					<xsd:documentation>Element containing the dimension of any item. Note: this element is meant to be used to allow counted items to be included in the dimensioning of a derived quantity, e.g., electrons per time; usage of this element does not conform to the SI description of the dimension of a quantity in terms of seven base quantities.</xsd:documentation>
+				</xsd:annotation>
+			</xsd:element>
+		</xsd:sequence>
+		<xsd:attribute ref="xml:id" use="required"/>
+		<xsd:attribute name="dimensionless" type="xsd:boolean" use="optional" default="0">
+			<xsd:annotation>
+				<xsd:documentation>Boolean to designate that a quantity or unit is dimensionless.</xsd:documentation>
+			</xsd:annotation>
+		</xsd:attribute>
+	</xsd:complexType>
+	<xsd:complexType name="LengthType">
+		<xsd:annotation>
+			<xsd:documentation>Type of the quantity length.</xsd:documentation>
+		</xsd:annotation>
+		<xsd:attribute name="symbol" type="xsd:token" use="optional" fixed="L">
+			<xsd:annotation>
+				<xsd:documentation>Symbol of the quantity length.</xsd:documentation>
+			</xsd:annotation>
+		</xsd:attribute>
+		<xsd:attributeGroup ref="powerRational"/>
+	</xsd:complexType>
+	<xsd:complexType name="MassType">
+		<xsd:annotation>
+			<xsd:documentation>Type of the quantity mass.</xsd:documentation>
+		</xsd:annotation>
+		<xsd:attribute name="symbol" type="xsd:token" use="optional" fixed="M">
+			<xsd:annotation>
+				<xsd:documentation>Symbol of the quantity mass.</xsd:documentation>
+			</xsd:annotation>
+		</xsd:attribute>
+		<xsd:attributeGroup ref="powerRational"/>
+	</xsd:complexType>
+	<xsd:complexType name="TimeType">
+		<xsd:annotation>
+			<xsd:documentation>Type of the quantity time.</xsd:documentation>
+		</xsd:annotation>
+		<xsd:attribute name="symbol" type="xsd:token" use="optional" fixed="T">
+			<xsd:annotation>
+				<xsd:documentation>Symbol of the quantity time.</xsd:documentation>
+			</xsd:annotation>
+		</xsd:attribute>
+		<xsd:attributeGroup ref="powerRational"/>
+	</xsd:complexType>
+	<xsd:complexType name="ElectricCurrentType">
+		<xsd:annotation>
+			<xsd:documentation>Type of the quantity electric current.</xsd:documentation>
+		</xsd:annotation>
+		<xsd:attribute name="symbol" type="xsd:token" use="optional" fixed="I">
+			<xsd:annotation>
+				<xsd:documentation>Symbol of the quantity electric current.</xsd:documentation>
+			</xsd:annotation>
+		</xsd:attribute>
+		<xsd:attributeGroup ref="powerRational"/>
+	</xsd:complexType>
+	<xsd:complexType name="ThermodynamicTemperatureType">
+		<xsd:annotation>
+			<xsd:documentation>Type of the quantity thermodynamic temperature.</xsd:documentation>
+		</xsd:annotation>
+		<xsd:attribute name="symbol" type="xsd:token" use="optional" fixed="Θ">
+			<xsd:annotation>
+				<xsd:documentation>Symbol of the quantity thermodynamic temperature.</xsd:documentation>
+			</xsd:annotation>
+		</xsd:attribute>
+		<xsd:attributeGroup ref="powerRational"/>
+	</xsd:complexType>
+	<xsd:complexType name="AmountOfSubstanceType">
+		<xsd:annotation>
+			<xsd:documentation>Type of the quantity amount of substance.</xsd:documentation>
+		</xsd:annotation>
+		<xsd:attribute name="symbol" type="xsd:token" use="optional" fixed="N">
+			<xsd:annotation>
+				<xsd:documentation>Symbol of the quantity amount of substance.</xsd:documentation>
+			</xsd:annotation>
+		</xsd:attribute>
+		<xsd:attributeGroup ref="powerRational"/>
+	</xsd:complexType>
+	<xsd:complexType name="LuminousIntensityType">
+		<xsd:annotation>
+			<xsd:documentation>Type of the quantity luminous intensity.</xsd:documentation>
+		</xsd:annotation>
+		<xsd:attribute name="symbol" type="xsd:token" use="optional" fixed="J">
+			<xsd:annotation>
+				<xsd:documentation>Symbol of the quantity luminous intensity.</xsd:documentation>
+			</xsd:annotation>
+		</xsd:attribute>
+		<xsd:attributeGroup ref="powerRational"/>
+	</xsd:complexType>
+	<xsd:complexType name="PlaneAngleType">
+		<xsd:annotation>
+			<xsd:documentation>Type of the quantity plane angle.</xsd:documentation>
+		</xsd:annotation>
+		<xsd:attribute name="symbol" type="xsd:token">
+			<xsd:annotation>
+				<xsd:documentation>Symbol of the quantity plane angle.</xsd:documentation>
+			</xsd:annotation>
+		</xsd:attribute>
+		<xsd:attributeGroup ref="powerRational"/>
+	</xsd:complexType>
+	<xsd:complexType name="ItemType">
+		<xsd:annotation>
+			<xsd:documentation>Type of the quantity represented by a counted item, e.g., electron</xsd:documentation>
+		</xsd:annotation>
+		<xsd:attribute name="itemURL" type="xsd:anyURI" use="required">
+			<xsd:annotation>
+				<xsd:documentation>Unique URL for identifying or describing the item.</xsd:documentation>
+			</xsd:annotation>
+		</xsd:attribute>
+		<xsd:attribute name="itemSymbol" type="xsd:token">
+			<xsd:annotation>
+				<xsd:documentation>Symbol for the item.</xsd:documentation>
+			</xsd:annotation>
+		</xsd:attribute>
+		<xsd:attributeGroup ref="powerRational"/>
+	</xsd:complexType>
+	<!--     === Prefix specific Types ===-->
+	<xsd:complexType name="PrefixSetType">
+		<xsd:annotation>
+			<xsd:documentation>Type for container for prefixes.</xsd:documentation>
+		</xsd:annotation>
+		<xsd:sequence>
+			<xsd:element ref="Prefix" maxOccurs="unbounded"/>
+		</xsd:sequence>
+	</xsd:complexType>
+	<xsd:complexType name="PrefixType">
+		<xsd:annotation>
+			<xsd:documentation>Type for element for describing prefixes. Use in container PrefixSet.</xsd:documentation>
+		</xsd:annotation>
+		<xsd:sequence>
+			<xsd:element ref="PrefixName" maxOccurs="unbounded"/>
+			<xsd:element ref="PrefixSymbol" minOccurs="0" maxOccurs="unbounded"/>
+		</xsd:sequence>
+		<xsd:attribute ref="xml:id" use="required"/>
+		<xsd:attribute name="prefixBase" default="10">
+			<xsd:annotation>
+				<xsd:documentation>The base of the prefix system, i.e., 10 (SI) or 2 (binary).</xsd:documentation>
+			</xsd:annotation>
+			<xsd:simpleType>
+				<xsd:restriction base="xsd:byte">
+					<xsd:enumeration value="10"/>
+					<xsd:enumeration value="2"/>
+				</xsd:restriction>
+			</xsd:simpleType>
+		</xsd:attribute>
+		<xsd:attribute name="prefixPower" type="xsd:byte">
+			<xsd:annotation>
+				<xsd:documentation>The exponential power of the prefix with relation to the base.</xsd:documentation>
+			</xsd:annotation>
+		</xsd:attribute>
+	</xsd:complexType>
+	<!--     === General Types ===-->
+	<xsd:complexType name="NameType">
+		<xsd:annotation>
+			<xsd:documentation>Type for name.  Used for names in units, quantities, and prefixes.</xsd:documentation>
+		</xsd:annotation>
+		<xsd:simpleContent>
+			<xsd:extension base="xsd:token">
+				<xsd:attribute ref="xml:lang"/>
+			</xsd:extension>
+		</xsd:simpleContent>
+	</xsd:complexType>
+	<xsd:complexType name="SystemType">
+		<xsd:annotation>
+			<xsd:documentation>Type for unit system.</xsd:documentation>
+		</xsd:annotation>
+		<xsd:attribute name="name" type="xsd:token" use="required">
+			<xsd:annotation>
+				<xsd:documentation>Name of the unit system.   For example, SI, inch-pound, CGS, and MKS.</xsd:documentation>
+			</xsd:annotation>
+		</xsd:attribute>
+		<xsd:attribute name="type" type="xsd:string" use="optional">
+			<xsd:annotation>
+				<xsd:documentation>Description of the unit relative to the unit system.  Examples are SI_base and non-SI_not_acceptable.</xsd:documentation>
+			</xsd:annotation>
+		</xsd:attribute>
+		<xsd:attribute ref="xml:lang"/>
+	</xsd:complexType>
+	<xsd:complexType name="SymbolType" mixed="true">
+		<xsd:annotation>
+			<xsd:documentation>Type for symbols.  Used in units, quantities, and prefixes.</xsd:documentation>
+		</xsd:annotation>
+		<xsd:sequence minOccurs="0" maxOccurs="unbounded">
+			<xsd:any processContents="skip" maxOccurs="unbounded"/>
+		</xsd:sequence>
+		<xsd:attribute ref="xml:lang"/>
+		<xsd:attribute name="type" use="required">
+			<xsd:annotation>
+				<xsd:documentation>Type of symbol representation.  Examples include ASCII, unicode, HTML, and MathML.</xsd:documentation>
+			</xsd:annotation>
+			<xsd:simpleType>
+				<xsd:union memberTypes="xsd:token">
+					<xsd:simpleType>
+						<xsd:restriction base="xsd:token">
+							<xsd:enumeration value="ASCII"/>
+							<xsd:enumeration value="Unicode"/>
+							<xsd:enumeration value="LaTeX"/>
+							<xsd:enumeration value="HTML"/>
+							<xsd:enumeration value="MathML"/>
+							<xsd:enumeration value="SVG"/>
+						</xsd:restriction>
+					</xsd:simpleType>
+				</xsd:union>
+			</xsd:simpleType>
+		</xsd:attribute>
+	</xsd:complexType>
+	<xsd:complexType name="NoteType">
+		<xsd:annotation>
+			<xsd:documentation>Type for notes.  Used in units and conversion factors.</xsd:documentation>
+		</xsd:annotation>
+		<xsd:simpleContent>
+			<xsd:extension base="xsd:string">
+				<xsd:attribute ref="xml:lang"/>
+			</xsd:extension>
+		</xsd:simpleContent>
+	</xsd:complexType>
+	<xsd:complexType name="DefinitionType">
+		<xsd:annotation>
+			<xsd:documentation>Type for definition.</xsd:documentation>
+		</xsd:annotation>
+		<xsd:simpleContent>
+			<xsd:extension base="xsd:string">
+				<xsd:attributeGroup ref="sourceURL"/>
+				<xsd:attributeGroup ref="sourceName"/>
+				<xsd:attribute ref="xml:lang"/>
+			</xsd:extension>
+		</xsd:simpleContent>
+	</xsd:complexType>
+	<xsd:complexType name="HistoryType">
+		<xsd:annotation>
+			<xsd:documentation>Type for history.</xsd:documentation>
+		</xsd:annotation>
+		<xsd:simpleContent>
+			<xsd:extension base="xsd:string">
+				<xsd:attributeGroup ref="sourceURL"/>
+				<xsd:attributeGroup ref="sourceName"/>
+				<xsd:attribute ref="xml:lang"/>
+			</xsd:extension>
+		</xsd:simpleContent>
+	</xsd:complexType>
+	<xsd:complexType name="RemarkType">
+		<xsd:annotation>
+			<xsd:documentation>Type for remark.</xsd:documentation>
+		</xsd:annotation>
+		<xsd:simpleContent>
+			<xsd:extension base="xsd:string">
+				<xsd:attributeGroup ref="sourceURL"/>
+				<xsd:attributeGroup ref="sourceName"/>
+				<xsd:attribute ref="xml:lang">
+					<xsd:annotation>
+						<xsd:documentation>Primary language of the element and/or its attributes. [See RFC 4646, RFC 4647 and ISO 639.]</xsd:documentation>
+					</xsd:annotation>
+				</xsd:attribute>
+			</xsd:extension>
+		</xsd:simpleContent>
+	</xsd:complexType>
+	<xsd:complexType name="ReferenceType">
+		<xsd:annotation>
+			<xsd:documentation>Type for reference to a unit or quantity.</xsd:documentation>
+		</xsd:annotation>
+		<xsd:attribute name="url" type="xsd:anyURI" use="required">
+			<xsd:annotation>
+				<xsd:documentation>URL to the reference item.</xsd:documentation>
+			</xsd:annotation>
+		</xsd:attribute>
+		<xsd:attribute name="name" type="xsd:token" use="optional">
+			<xsd:annotation>
+				<xsd:documentation>Name of the referenced item.</xsd:documentation>
+			</xsd:annotation>
+		</xsd:attribute>
+		<xsd:attribute ref="xml:lang">
+			<xsd:annotation>
+				<xsd:documentation>Primary language of the element and/or its attributes. [See RFC 4646, RFC 4647 and ISO 639.]</xsd:documentation>
+			</xsd:annotation>
+		</xsd:attribute>
+	</xsd:complexType>
+</xsd:schema>
diff --git a/spec/fixtures/lutaml/xsd_schemas/wml.xsd b/spec/fixtures/lutaml/xsd_schemas/wml.xsd
new file mode 100644
index 00000000..1db93782
--- /dev/null
+++ b/spec/fixtures/lutaml/xsd_schemas/wml.xsd
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
+  targetNamespace="http://schemas.openxmlformats.org/wordprocessingml/2006/main"
+  xmlns:w="http://schemas.openxmlformats.org/wordprocessingml/2006/main"
+  elementFormDefault="qualified"
+  attributeFormDefault="qualified">
+  <xsd:group name="EG_RPr">
+    <xsd:sequence/>
+  </xsd:group>
+  <xsd:group name="EG_RunInnerContent">
+    <xsd:sequence/>
+  </xsd:group>
+  <xsd:group name="EG_RPrMath">
+    <xsd:sequence/>
+  </xsd:group>
+  <xsd:group name="EG_RunLevelElts">
+    <xsd:sequence/>
+  </xsd:group>
+</xsd:schema>

From 0f170de7c80d2998ebf56553a87c2b7aee08d4a7 Mon Sep 17 00:00:00 2001
From: Ronald Tse <ronald.tse@ribose.com>
Date: Thu, 14 May 2026 07:16:40 +0800
Subject: [PATCH 2/2] spec: add UnitsML/OMML XSD rendering and direct block
 specs

Add comprehensive specs covering:
- UnitsML schema elements and complex types (block syntax)
- OMML schema with location option (block syntax)
- Full UnitsML documentation with cross-references (block syntax)
- XSD direct block syntax with external Liquid templates
- Mixed direct + block syntax in same document
- Missing template file error handling

Includes expected output XML fixtures for semantic comparison.
---
 ...rst-unitsml-expected-output-v1.0-csd04.xml | 373 ++++++++
 ...mal-unitsml-expected-output-v1.0-csd04.xml | 313 +++++++
 .../unitsml-expected-output-v1.0-csd04.xml    | 800 ++++++++++++++++++
 spec/fixtures/lutaml/unitsml_expected.xml     | 577 +++++++++++++
 .../lutaml/lutaml_xsd_preprocessor_spec.rb    | 236 ++++++
 5 files changed, 2299 insertions(+)
 create mode 100644 spec/fixtures/lutaml/first-unitsml-expected-output-v1.0-csd04.xml
 create mode 100644 spec/fixtures/lutaml/minimal-unitsml-expected-output-v1.0-csd04.xml
 create mode 100644 spec/fixtures/lutaml/unitsml-expected-output-v1.0-csd04.xml
 create mode 100644 spec/fixtures/lutaml/unitsml_expected.xml

diff --git a/spec/fixtures/lutaml/first-unitsml-expected-output-v1.0-csd04.xml b/spec/fixtures/lutaml/first-unitsml-expected-output-v1.0-csd04.xml
new file mode 100644
index 00000000..b6c59bd1
--- /dev/null
+++ b/spec/fixtures/lutaml/first-unitsml-expected-output-v1.0-csd04.xml
@@ -0,0 +1,373 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<metanorma xmlns="https://www.metanorma.org/ns/standoc" type="semantic" version="_" flavor="standoc">
+<bibdata type="standard">
+<title language="en" type="main">Document title</title>
+<language>en</language><script>Latn</script><status><stage>published</stage></status><copyright><from>_</from></copyright><ext><doctype>standard</doctype><flavor>standoc</flavor></ext></bibdata><metanorma-extension><semantic-metadata><stage-published>true</stage-published></semantic-metadata>
+<presentation-metadata><toc-heading-levels>2</toc-heading-levels><html-toc-heading-levels>2</html-toc-heading-levels><doc-toc-heading-levels>2</doc-toc-heading-levels><pdf-toc-heading-levels>2</pdf-toc-heading-levels></presentation-metadata></metanorma-extension>
+<sections><clause id="_" inline-header="false" obligation="normative">
+<title id="_">Elements</title>
+<p id="_">Name: <strong>UnitsML</strong></p>
+
+<p id="_">Type: <strong>UnitsMLType</strong></p>
+
+<p id="_">Name: <strong>UnitSet</strong></p>
+
+<p id="_">Type: <strong>UnitSetType</strong></p>
+
+<p id="_">Name: <strong>Unit</strong></p>
+
+<p id="_">Type: <strong>UnitType</strong></p>
+
+<p id="_">Name: <strong>UnitSystem</strong></p>
+
+<p id="_">Type: <strong>SystemType</strong></p>
+
+<p id="_">Name: <strong>UnitName</strong></p>
+
+<p id="_">Type: <strong>NameType</strong></p>
+
+<p id="_">Name: <strong>UnitSymbol</strong></p>
+
+<p id="_">Type: <strong>SymbolType</strong></p>
+
+<p id="_">Name: <strong>UnitVersionHistory</strong></p>
+
+<p id="_">Type: <strong>NoteType</strong></p>
+
+<p id="_">Name: <strong>CodeListValue</strong></p>
+
+<p id="_">Type: <strong>CodeListValueType</strong></p>
+
+<p id="_">Name: <strong>RootUnits</strong></p>
+
+<p id="_">Type: <strong>RootUnitsType</strong></p>
+
+<p id="_">Name: <strong>EnumeratedRootUnit</strong></p>
+
+<p id="_">Type: <strong>EnumeratedRootUnitType</strong></p>
+
+<p id="_">Name: <strong>ExternalRootUnit</strong></p>
+
+<p id="_">Type: <strong>ExternalRootUnitType</strong></p>
+
+<p id="_">Name: <strong>Conversions</strong></p>
+
+<p id="_">Type: <strong>ConversionsType</strong></p>
+
+<p id="_">Name: <strong>Float64ConversionFrom</strong></p>
+
+<p id="_">Type: <strong>Float64ConversionFromType</strong></p>
+
+<p id="_">Name: <strong>ConversionNote</strong></p>
+
+<p id="_">Type: <strong>NoteType</strong></p>
+
+<p id="_">Name: <strong>SpecialConversionFrom</strong></p>
+
+<p id="_">Type: <strong>SpecialConversionFromType</strong></p>
+
+<p id="_">Name: <strong>WSDLConversionFrom</strong></p>
+
+<p id="_">Type: <strong>WSDLConversionFromType</strong></p>
+
+<p id="_">Name: <strong>WSDLDescription</strong></p>
+
+<p id="_">Type: <strong>NoteType</strong></p>
+
+<p id="_">Name: <strong>ConversionDescription</strong></p>
+
+<p id="_">Type: <strong>NoteType</strong></p>
+
+<p id="_">Name: <strong>QuantityReference</strong></p>
+
+<p id="_">Type: <strong>ReferenceType</strong></p>
+
+<p id="_">Name: <strong>UnitDefinition</strong></p>
+
+<p id="_">Type: <strong>DefinitionType</strong></p>
+
+<p id="_">Name: <strong>UnitHistory</strong></p>
+
+<p id="_">Type: <strong>HistoryType</strong></p>
+
+<p id="_">Name: <strong>UnitRemark</strong></p>
+
+<p id="_">Type: <strong>RemarkType</strong></p>
+
+<p id="_">Name: <strong>CountedItemSet</strong></p>
+
+<p id="_">Type: <strong>CountedItemSetType</strong></p>
+
+<p id="_">Name: <strong>CountedItem</strong></p>
+
+<p id="_">Type: <strong>CountedItemType</strong></p>
+
+<p id="_">Name: <strong>ItemName</strong></p>
+
+<p id="_">Type: <strong>NameType</strong></p>
+
+<p id="_">Name: <strong>ItemSymbol</strong></p>
+
+<p id="_">Type: <strong>SymbolType</strong></p>
+
+<p id="_">Name: <strong>ItemVersionHistory</strong></p>
+
+<p id="_">Type: <strong>NoteType</strong></p>
+
+<p id="_">Name: <strong>ItemDefinition</strong></p>
+
+<p id="_">Type: <strong>DefinitionType</strong></p>
+
+<p id="_">Name: <strong>ItemHistory</strong></p>
+
+<p id="_">Type: <strong>HistoryType</strong></p>
+
+<p id="_">Name: <strong>ItemRemark</strong></p>
+
+<p id="_">Type: <strong>RemarkType</strong></p>
+
+<p id="_">Name: <strong>QuantitySet</strong></p>
+
+<p id="_">Type: <strong>QuantitySetType</strong></p>
+
+<p id="_">Name: <strong>Quantity</strong></p>
+
+<p id="_">Type: <strong>QuantityType</strong></p>
+
+<p id="_">Name: <strong>QuantityName</strong></p>
+
+<p id="_">Type: <strong>NameType</strong></p>
+
+<p id="_">Name: <strong>QuantitySymbol</strong></p>
+
+<p id="_">Type: <strong>SymbolType</strong></p>
+
+<p id="_">Name: <strong>UnitReference</strong></p>
+
+<p id="_">Type: <strong>ReferenceType</strong></p>
+
+<p id="_">Name: <strong>QuantityVersionHistory</strong></p>
+
+<p id="_">Type: <strong>NoteType</strong></p>
+
+<p id="_">Name: <strong>QuantityDefinition</strong></p>
+
+<p id="_">Type: <strong>DefinitionType</strong></p>
+
+<p id="_">Name: <strong>QuantityHistory</strong></p>
+
+<p id="_">Type: <strong>HistoryType</strong></p>
+
+<p id="_">Name: <strong>QuantityRemark</strong></p>
+
+<p id="_">Type: <strong>RemarkType</strong></p>
+
+<p id="_">Name: <strong>DimensionSet</strong></p>
+
+<p id="_">Type: <strong>DimensionSetType</strong></p>
+
+<p id="_">Name: <strong>Dimension</strong></p>
+
+<p id="_">Type: <strong>DimensionType</strong></p>
+
+<p id="_">Name: <strong>Length</strong></p>
+
+<p id="_">Type: <strong>LengthType</strong></p>
+
+<p id="_">Name: <strong>Mass</strong></p>
+
+<p id="_">Type: <strong>MassType</strong></p>
+
+<p id="_">Name: <strong>Time</strong></p>
+
+<p id="_">Type: <strong>TimeType</strong></p>
+
+<p id="_">Name: <strong>ElectricCurrent</strong></p>
+
+<p id="_">Type: <strong>ElectricCurrentType</strong></p>
+
+<p id="_">Name: <strong>ThermodynamicTemperature</strong></p>
+
+<p id="_">Type: <strong>ThermodynamicTemperatureType</strong></p>
+
+<p id="_">Name: <strong>AmountOfSubstance</strong></p>
+
+<p id="_">Type: <strong>AmountOfSubstanceType</strong></p>
+
+<p id="_">Name: <strong>LuminousIntensity</strong></p>
+
+<p id="_">Type: <strong>LuminousIntensityType</strong></p>
+
+<p id="_">Name: <strong>PlaneAngle</strong></p>
+
+<p id="_">Type: <strong>PlaneAngleType</strong></p>
+
+<p id="_">Name: <strong>Item</strong></p>
+
+<p id="_">Type: <strong>ItemType</strong></p>
+
+<p id="_">Name: <strong>PrefixSet</strong></p>
+
+<p id="_">Type: <strong>PrefixSetType</strong></p>
+
+<p id="_">Name: <strong>Prefix</strong></p>
+
+<p id="_">Type: <strong>PrefixType</strong></p>
+
+<p id="_">Name: <strong>PrefixName</strong></p>
+
+<p id="_">Type: <strong>NameType</strong></p>
+
+<p id="_">Name: <strong>PrefixSymbol</strong></p>
+
+<p id="_">Type: <strong>SymbolType</strong></p>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">ComplexTypes</title>
+<p id="_">Name: <strong>UnitsMLType</strong></p>
+
+<p id="_">Description: ComplexType for the root element of an UnitsML document.</p>
+
+<p id="_">Name: <strong>UnitSetType</strong></p>
+
+<p id="_">Description: Type for the unit container.</p>
+
+<p id="_">Name: <strong>UnitType</strong></p>
+
+<p id="_">Description: Type for the unit.</p>
+
+<p id="_">Name: <strong>CodeListValueType</strong></p>
+
+<p id="_">Description: Type for the element for listing the unit code value from a specific code list.</p>
+
+<p id="_">Name: <strong>RootUnitsType</strong></p>
+
+<p id="_">Description: Type for the container for defining derived units in terms of their root units. This allows a precise definition of a wide range of units. The goal is to improve interoperability among applications and databases which use derived units based on commonly encountered base units.</p>
+
+<p id="_">Name: <strong>EnumeratedRootUnitType</strong></p>
+
+<p id="_">Description: Type for the element for a root unit (from an extensive enumerated list) allowing an optional prefix and power. E.g., mm^2</p>
+
+<p id="_">Name: <strong>ExternalRootUnitType</strong></p>
+
+<p id="_">Description: Type for the element for those special cases where the root unit needed is not included in the enumerated list in the above element.</p>
+
+<p id="_">Name: <strong>ConversionsType</strong></p>
+
+<p id="_">Description: Type for the container for providing conversion information to other units.</p>
+
+<p id="_">Name: <strong>Float64ConversionFromType</strong></p>
+
+<p id="_">Description: Type for the element for providing factors for a conversion equation from another unit; y = d + b / c) (x + a<index><primary>b / c) (x + a</primary></index></p>
+
+<p id="_">Name: <strong>SpecialConversionFromType</strong></p>
+
+<p id="_">Description: Type for the element for providing unit conversion information for conversions that are more complex than the Float64ConversionFrom linear equation.</p>
+
+<p id="_">Name: <strong>WSDLConversionFromType</strong></p>
+
+<p id="_">Description: Type for the element for providing unit conversion information for conversions that are more complex than the Float64ConversionFrom linear equation.</p>
+
+<p id="_">Name: <strong>CountedItemSetType</strong></p>
+
+<p id="_">Description: Type for a set of counted items.</p>
+
+<p id="_">Name: <strong>CountedItemType</strong></p>
+
+<p id="_">Description: Type for a single counted item.</p>
+
+<p id="_">Name: <strong>QuantitySetType</strong></p>
+
+<p id="_">Description: Type for quantity container.</p>
+
+<p id="_">Name: <strong>QuantityType</strong></p>
+
+<p id="_">Description: Type for the quantity.</p>
+
+<p id="_">Name: <strong>DimensionSetType</strong></p>
+
+<p id="_">Description: Type for the dimension container.</p>
+
+<p id="_">Name: <strong>DimensionType</strong></p>
+
+<p id="_">Description: Type for dimension.</p>
+
+<p id="_">Name: <strong>LengthType</strong></p>
+
+<p id="_">Description: Type of the quantity length.</p>
+
+<p id="_">Name: <strong>MassType</strong></p>
+
+<p id="_">Description: Type of the quantity mass.</p>
+
+<p id="_">Name: <strong>TimeType</strong></p>
+
+<p id="_">Description: Type of the quantity time.</p>
+
+<p id="_">Name: <strong>ElectricCurrentType</strong></p>
+
+<p id="_">Description: Type of the quantity electric current.</p>
+
+<p id="_">Name: <strong>ThermodynamicTemperatureType</strong></p>
+
+<p id="_">Description: Type of the quantity thermodynamic temperature.</p>
+
+<p id="_">Name: <strong>AmountOfSubstanceType</strong></p>
+
+<p id="_">Description: Type of the quantity amount of substance.</p>
+
+<p id="_">Name: <strong>LuminousIntensityType</strong></p>
+
+<p id="_">Description: Type of the quantity luminous intensity.</p>
+
+<p id="_">Name: <strong>PlaneAngleType</strong></p>
+
+<p id="_">Description: Type of the quantity plane angle.</p>
+
+<p id="_">Name: <strong>ItemType</strong></p>
+
+<p id="_">Description: Type of the quantity represented by a counted item, e.g., electron</p>
+
+<p id="_">Name: <strong>PrefixSetType</strong></p>
+
+<p id="_">Description: Type for container for prefixes.</p>
+
+<p id="_">Name: <strong>PrefixType</strong></p>
+
+<p id="_">Description: Type for element for describing prefixes. Use in container PrefixSet.</p>
+
+<p id="_">Name: <strong>NameType</strong></p>
+
+<p id="_">Description: Type for name.  Used for names in units, quantities, and prefixes.</p>
+
+<p id="_">Name: <strong>SystemType</strong></p>
+
+<p id="_">Description: Type for unit system.</p>
+
+<p id="_">Name: <strong>SymbolType</strong></p>
+
+<p id="_">Description: Type for symbols.  Used in units, quantities, and prefixes.</p>
+
+<p id="_">Name: <strong>NoteType</strong></p>
+
+<p id="_">Description: Type for notes.  Used in units and conversion factors.</p>
+
+<p id="_">Name: <strong>DefinitionType</strong></p>
+
+<p id="_">Description: Type for definition.</p>
+
+<p id="_">Name: <strong>HistoryType</strong></p>
+
+<p id="_">Description: Type for history.</p>
+
+<p id="_">Name: <strong>RemarkType</strong></p>
+
+<p id="_">Description: Type for remark.</p>
+
+<p id="_">Name: <strong>ReferenceType</strong></p>
+
+<p id="_">Description: Type for reference to a unit or quantity.</p>
+</clause>
+</sections>
+</metanorma>
diff --git a/spec/fixtures/lutaml/minimal-unitsml-expected-output-v1.0-csd04.xml b/spec/fixtures/lutaml/minimal-unitsml-expected-output-v1.0-csd04.xml
new file mode 100644
index 00000000..3da6b8ac
--- /dev/null
+++ b/spec/fixtures/lutaml/minimal-unitsml-expected-output-v1.0-csd04.xml
@@ -0,0 +1,313 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<metanorma xmlns="https://www.metanorma.org/ns/standoc" type="semantic" version="_" flavor="standoc">
+<bibdata type="standard">
+<title language="en" type="main">Document title</title>
+<language>en</language><script>Latn</script><status><stage>published</stage></status><copyright><from>_</from></copyright><ext><doctype>standard</doctype><flavor>standoc</flavor></ext></bibdata><metanorma-extension><semantic-metadata><stage-published>true</stage-published></semantic-metadata>
+<presentation-metadata><toc-heading-levels>2</toc-heading-levels><html-toc-heading-levels>2</html-toc-heading-levels><doc-toc-heading-levels>2</doc-toc-heading-levels><pdf-toc-heading-levels>2</pdf-toc-heading-levels></presentation-metadata></metanorma-extension>
+<sections><clause id="_" inline-header="false" obligation="normative">
+<title id="_">Elements</title>
+<p id="_">Name: <strong>mathPr</strong></p>
+
+<p id="_">Type: <strong>CT_MathPr</strong></p>
+
+<p id="_">Name: <strong>oMathPara</strong></p>
+
+<p id="_">Type: <strong>CT_OMathPara</strong></p>
+
+<p id="_">Name: <strong>oMath</strong></p>
+
+<p id="_">Type: <strong>CT_OMath</strong></p>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">ComplexTypes</title>
+<p id="_">Name: <strong>CT_Integer255</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_Integer2</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_SpacingRule</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_UnSignedInteger</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_Char</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_OnOff</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_String</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_XAlign</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_YAlign</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_Shp</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_FType</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_LimLoc</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_TopBot</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_Script</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_Style</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_ManualBreak</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_RPR</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_Text</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_R</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_CtrlPr</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_AccPr</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_Acc</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_BarPr</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_Bar</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_BoxPr</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_Box</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_BorderBoxPr</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_BorderBox</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_DPr</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_D</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_EqArrPr</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_EqArr</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_FPr</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_F</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_FuncPr</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_Func</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_GroupChrPr</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_GroupChr</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_LimLowPr</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_LimLow</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_LimUppPr</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_LimUpp</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_MCPr</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_MC</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_MCS</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_MPr</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_MR</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_M</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_NaryPr</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_Nary</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_PhantPr</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_Phant</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_RadPr</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_Rad</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_SPrePr</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_SPre</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_SSubPr</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_SSub</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_SSubSupPr</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_SSubSup</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_SSupPr</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_SSup</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_OMathArgPr</strong></p>
+
+<p id="_">Description: Math Argument Properties</p>
+
+<p id="_">Name: <strong>CT_OMathArg</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_OMathJc</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_OMathParaPr</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_TwipsMeasure</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_BreakBin</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_BreakBinSub</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_MathPr</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_OMathPara</strong></p>
+
+<p id="_">Description: </p>
+
+<p id="_">Name: <strong>CT_OMath</strong></p>
+
+<p id="_">Description: </p>
+</clause>
+</sections>
+</metanorma>
diff --git a/spec/fixtures/lutaml/unitsml-expected-output-v1.0-csd04.xml b/spec/fixtures/lutaml/unitsml-expected-output-v1.0-csd04.xml
new file mode 100644
index 00000000..99e406d9
--- /dev/null
+++ b/spec/fixtures/lutaml/unitsml-expected-output-v1.0-csd04.xml
@@ -0,0 +1,800 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<metanorma xmlns="https://www.metanorma.org/ns/standoc" type="semantic" version="_" flavor="standoc">
+<bibdata type="standard">
+<title language="en" type="main">Document title</title>
+<language>en</language><script>Latn</script><status><stage>published</stage></status><copyright><from>_</from></copyright><ext><doctype>standard</doctype><flavor>standoc</flavor></ext></bibdata><metanorma-extension><semantic-metadata><stage-published>true</stage-published></semantic-metadata>
+<presentation-metadata><toc-heading-levels>2</toc-heading-levels><html-toc-heading-levels>2</html-toc-heading-levels><doc-toc-heading-levels>2</doc-toc-heading-levels><pdf-toc-heading-levels>2</pdf-toc-heading-levels></presentation-metadata></metanorma-extension>
+<sections><clause id="_" anchor="top" inline-header="false" obligation="normative">
+<title id="_">Units Markup language (UnitsML) Schema Documentation unitsml-v1.0</title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Elements</title>
+<p id="_" anchor="element_UnitsML"><strong>Element:</strong> UnitsML</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_UnitsMLType" style="short"><display-text>UnitsMLType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Container for UnitsML units, quantities, and prefixes.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_UnitSet"><strong>Element:</strong> UnitSet</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_UnitSetType" style="short"><display-text>UnitSetType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Container for units. Use in UnitsML container or directly incorporate into a host schema.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_Unit"><strong>Element:</strong> Unit</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_UnitType" style="short"><display-text>UnitType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Element for describing units. Use in containers UnitSet or directly incorporate into a host schema.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_UnitSystem"><strong>Element:</strong> UnitSystem</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_SystemType" style="short"><display-text>SystemType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Container for describing the system of units.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_UnitName"><strong>Element:</strong> UnitName</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_NameType" style="short"><display-text>NameType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Element containing the unit name.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_UnitSymbol"><strong>Element:</strong> UnitSymbol</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_SymbolType" style="short"><display-text>SymbolType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Element containing various unit symbols.  Examples include Aring (ASCII), Å (HTML).</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_UnitVersionHistory"><strong>Element:</strong> UnitVersionHistory</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_NoteType" style="short"><display-text>NoteType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Element for descriptive information, including version changes to the unit.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_CodeListValue"><strong>Element:</strong> CodeListValue</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_CodeListValueType" style="short"><display-text>CodeListValueType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Element for listing the unit code value from a specific code list.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_RootUnits"><strong>Element:</strong> RootUnits</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_RootUnitsType" style="short"><display-text>RootUnitsType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Container for defining derived units in terms of their root units. This allows a precise definition of a wide range of units. The goal is to improve interoperability among applications and databases which use derived units based on commonly encountered root units.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_EnumeratedRootUnit"><strong>Element:</strong> EnumeratedRootUnit</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_EnumeratedRootUnitType" style="short"><display-text>EnumeratedRootUnitType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Element for a root unit (from an extensive enumerated list) allowing an optional prefix and power. E.g., mm^2</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_ExternalRootUnit"><strong>Element:</strong> ExternalRootUnit</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_ExternalRootUnitType" style="short"><display-text>ExternalRootUnitType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Element for those special cases where the root unit needed is not included in the enumerated list in the above element.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_Conversions"><strong>Element:</strong> Conversions</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_ConversionsType" style="short"><display-text>ConversionsType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Container for providing conversion information to other units.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_Float64ConversionFrom"><strong>Element:</strong> Float64ConversionFrom</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_Float64ConversionFromType" style="short"><display-text>Float64ConversionFromType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Element for providing factors for a conversion equation from another unit; y = d + b / c) (x + a<index><primary>b / c) (x + a</primary></index></p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_ConversionNote"><strong>Element:</strong> ConversionNote</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_NoteType" style="short"><display-text>NoteType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Element for descriptive information.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_SpecialConversionFrom"><strong>Element:</strong> SpecialConversionFrom</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_SpecialConversionFromType" style="short"><display-text>SpecialConversionFromType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Element for providing unit conversion information for conversions that are more complex than the Float64ConversionFrom linear equation.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_WSDLConversionFrom"><strong>Element:</strong> WSDLConversionFrom</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_WSDLConversionFromType" style="short"><display-text>WSDLConversionFromType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Element for providing conversion based on SOAP/WSDL calls to a remote server.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_WSDLDescription"><strong>Element:</strong> WSDLDescription</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_NoteType" style="short"><display-text>NoteType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Element to describe the WSDL service.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_ConversionDescription"><strong>Element:</strong> ConversionDescription</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_NoteType" style="short"><display-text>NoteType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Element for a description of the SpecialConversionFrom.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_QuantityReference"><strong>Element:</strong> QuantityReference</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_ReferenceType" style="short"><display-text>ReferenceType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Element for all quantities that can be expressed using this unit.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_UnitDefinition"><strong>Element:</strong> UnitDefinition</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_DefinitionType" style="short"><display-text>DefinitionType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Element to describe the definition of the unit.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_UnitHistory"><strong>Element:</strong> UnitHistory</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_HistoryType" style="short"><display-text>HistoryType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Element to describe the historical development of the unit.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_UnitRemark"><strong>Element:</strong> UnitRemark</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_RemarkType" style="short"><display-text>RemarkType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Element as a placeholder for additional information.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_CountedItemSet"><strong>Element:</strong> CountedItemSet</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_CountedItemSetType" style="short"><display-text>CountedItemSetType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Container for items that are counted and are (in practice) combined with scientific units of measure.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_CountedItem"><strong>Element:</strong> CountedItem</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_CountedItemType" style="short"><display-text>CountedItemType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Container for a single counted item.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_ItemName"><strong>Element:</strong> ItemName</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_NameType" style="short"><display-text>NameType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Element containing the item name(s).</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_ItemSymbol"><strong>Element:</strong> ItemSymbol</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_SymbolType" style="short"><display-text>SymbolType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Element containing symbols for the item.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_ItemVersionHistory"><strong>Element:</strong> ItemVersionHistory</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_NoteType" style="short"><display-text>NoteType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Element for descriptive information, including version changes to the item.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_ItemDefinition"><strong>Element:</strong> ItemDefinition</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_DefinitionType" style="short"><display-text>DefinitionType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Element to describe the definition of the item.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_ItemHistory"><strong>Element:</strong> ItemHistory</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_HistoryType" style="short"><display-text>HistoryType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Element to describe the historical development of the item.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_ItemRemark"><strong>Element:</strong> ItemRemark</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_RemarkType" style="short"><display-text>RemarkType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Element as a placeholder for additional information.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_QuantitySet"><strong>Element:</strong> QuantitySet</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_QuantitySetType" style="short"><display-text>QuantitySetType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Container for quantities.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_Quantity"><strong>Element:</strong> Quantity</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_QuantityType" style="short"><display-text>QuantityType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Element for describing quantities and referencing corresponding units. Use in container or directly incorporate into a host schema.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_QuantityName"><strong>Element:</strong> QuantityName</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_NameType" style="short"><display-text>NameType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Element containing the quantity name.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_QuantitySymbol"><strong>Element:</strong> QuantitySymbol</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_SymbolType" style="short"><display-text>SymbolType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Element containing various quantity symbols.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_UnitReference"><strong>Element:</strong> UnitReference</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_ReferenceType" style="short"><display-text>ReferenceType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Element for referencing a unit of measure from within the Quantity element.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_QuantityVersionHistory"><strong>Element:</strong> QuantityVersionHistory</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_NoteType" style="short"><display-text>NoteType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Element for descriptive information, including version changes to the unit.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_QuantityDefinition"><strong>Element:</strong> QuantityDefinition</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_DefinitionType" style="short"><display-text>DefinitionType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Element to describe the definition of the quantity.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_QuantityHistory"><strong>Element:</strong> QuantityHistory</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_HistoryType" style="short"><display-text>HistoryType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Element to describe the historical development of the quantity.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_QuantityRemark"><strong>Element:</strong> QuantityRemark</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_RemarkType" style="short"><display-text>RemarkType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Element as a placeholder for additional information.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_DimensionSet"><strong>Element:</strong> DimensionSet</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_DimensionSetType" style="short"><display-text>DimensionSetType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Container for dimensions.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_Dimension"><strong>Element:</strong> Dimension</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_DimensionType" style="short"><display-text>DimensionType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Element to express the dimension of a unit or quantity in terms of the SI base quantities length, mass, time, electric current, thermodynamic temperature, amount of substance, and luminous intensity.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_Length"><strong>Element:</strong> Length</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_LengthType" style="short"><display-text>LengthType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Element containing the dimension of the quantity length.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_Mass"><strong>Element:</strong> Mass</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_MassType" style="short"><display-text>MassType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Element containing the dimension of the quantity mass.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_Time"><strong>Element:</strong> Time</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_TimeType" style="short"><display-text>TimeType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Element containing the dimension of the quantity time.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_ElectricCurrent"><strong>Element:</strong> ElectricCurrent</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_ElectricCurrentType" style="short"><display-text>ElectricCurrentType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Element containing the dimension of the quantity electric current.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_ThermodynamicTemperature"><strong>Element:</strong> ThermodynamicTemperature</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_ThermodynamicTemperatureType" style="short"><display-text>ThermodynamicTemperatureType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Element containing the dimension of the quantity thermodynamic temerature.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_AmountOfSubstance"><strong>Element:</strong> AmountOfSubstance</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_AmountOfSubstanceType" style="short"><display-text>AmountOfSubstanceType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Element containing the dimension of the quantity amount of substance.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_LuminousIntensity"><strong>Element:</strong> LuminousIntensity</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_LuminousIntensityType" style="short"><display-text>LuminousIntensityType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Element containing the dimension of the quantity luminous intensity.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_PlaneAngle"><strong>Element:</strong> PlaneAngle</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_PlaneAngleType" style="short"><display-text>PlaneAngleType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Element containing the dimension of the quantity plane angle.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_Item"><strong>Element:</strong> Item</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_ItemType" style="short"><display-text>ItemType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Element containing the dimension of any item. Note: this element is meant to be used to allow counted items to be included in the dimensioning of a derived quantity, e.g., electrons per time; usage of this element does not conform to the SI description of the dimension of a quantity in terms of seven base quantities.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_PrefixSet"><strong>Element:</strong> PrefixSet</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_PrefixSetType" style="short"><display-text>PrefixSetType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Container for prefixes.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_Prefix"><strong>Element:</strong> Prefix</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_PrefixType" style="short"><display-text>PrefixType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Element containing information about a prefix.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_PrefixName"><strong>Element:</strong> PrefixName</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_NameType" style="short"><display-text>NameType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Element containing the prefix name.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="element_PrefixSymbol"><strong>Element:</strong> PrefixSymbol</p>
+
+<p id="_"><strong>Type:</strong> <xref target="complex_type_SymbolType" style="short"><display-text>SymbolType</display-text></xref></p>
+
+<p id="_"><strong>Description:</strong> Element containing prefix symbols.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/></clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Complex Types</title>
+<p id="_" anchor="complex_type_UnitsMLType"><strong>Complex Type:</strong> UnitsMLType</p>
+
+<p id="_"><strong>Description:</strong> ComplexType for the root element of an UnitsML document.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="complex_type_UnitSetType"><strong>Complex Type:</strong> UnitSetType</p>
+
+<p id="_"><strong>Description:</strong> Type for the unit container.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="complex_type_UnitType"><strong>Complex Type:</strong> UnitType</p>
+
+<p id="_"><strong>Description:</strong> Type for the unit.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="complex_type_CodeListValueType"><strong>Complex Type:</strong> CodeListValueType</p>
+
+<p id="_"><strong>Description:</strong> Type for the element for listing the unit code value from a specific code list.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="complex_type_RootUnitsType"><strong>Complex Type:</strong> RootUnitsType</p>
+
+<p id="_"><strong>Description:</strong> Type for the container for defining derived units in terms of their root units. This allows a precise definition of a wide range of units. The goal is to improve interoperability among applications and databases which use derived units based on commonly encountered base units.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="complex_type_EnumeratedRootUnitType"><strong>Complex Type:</strong> EnumeratedRootUnitType</p>
+
+<p id="_"><strong>Description:</strong> Type for the element for a root unit (from an extensive enumerated list) allowing an optional prefix and power. E.g., mm^2</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="complex_type_ExternalRootUnitType"><strong>Complex Type:</strong> ExternalRootUnitType</p>
+
+<p id="_"><strong>Description:</strong> Type for the element for those special cases where the root unit needed is not included in the enumerated list in the above element.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="complex_type_ConversionsType"><strong>Complex Type:</strong> ConversionsType</p>
+
+<p id="_"><strong>Description:</strong> Type for the container for providing conversion information to other units.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="complex_type_Float64ConversionFromType"><strong>Complex Type:</strong> Float64ConversionFromType</p>
+
+<p id="_"><strong>Description:</strong> Type for the element for providing factors for a conversion equation from another unit; y = d + b / c) (x + a<index><primary>b / c) (x + a</primary></index></p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="complex_type_SpecialConversionFromType"><strong>Complex Type:</strong> SpecialConversionFromType</p>
+
+<p id="_"><strong>Description:</strong> Type for the element for providing unit conversion information for conversions that are more complex than the Float64ConversionFrom linear equation.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="complex_type_WSDLConversionFromType"><strong>Complex Type:</strong> WSDLConversionFromType</p>
+
+<p id="_"><strong>Description:</strong> Type for the element for providing unit conversion information for conversions that are more complex than the Float64ConversionFrom linear equation.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="complex_type_CountedItemSetType"><strong>Complex Type:</strong> CountedItemSetType</p>
+
+<p id="_"><strong>Description:</strong> Type for a set of counted items.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="complex_type_CountedItemType"><strong>Complex Type:</strong> CountedItemType</p>
+
+<p id="_"><strong>Description:</strong> Type for a single counted item.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="complex_type_QuantitySetType"><strong>Complex Type:</strong> QuantitySetType</p>
+
+<p id="_"><strong>Description:</strong> Type for quantity container.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="complex_type_QuantityType"><strong>Complex Type:</strong> QuantityType</p>
+
+<p id="_"><strong>Description:</strong> Type for the quantity.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="complex_type_DimensionSetType"><strong>Complex Type:</strong> DimensionSetType</p>
+
+<p id="_"><strong>Description:</strong> Type for the dimension container.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="complex_type_DimensionType"><strong>Complex Type:</strong> DimensionType</p>
+
+<p id="_"><strong>Description:</strong> Type for dimension.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="complex_type_LengthType"><strong>Complex Type:</strong> LengthType</p>
+
+<p id="_"><strong>Description:</strong> Type of the quantity length.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="complex_type_MassType"><strong>Complex Type:</strong> MassType</p>
+
+<p id="_"><strong>Description:</strong> Type of the quantity mass.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="complex_type_TimeType"><strong>Complex Type:</strong> TimeType</p>
+
+<p id="_"><strong>Description:</strong> Type of the quantity time.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="complex_type_ElectricCurrentType"><strong>Complex Type:</strong> ElectricCurrentType</p>
+
+<p id="_"><strong>Description:</strong> Type of the quantity electric current.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="complex_type_ThermodynamicTemperatureType"><strong>Complex Type:</strong> ThermodynamicTemperatureType</p>
+
+<p id="_"><strong>Description:</strong> Type of the quantity thermodynamic temperature.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="complex_type_AmountOfSubstanceType"><strong>Complex Type:</strong> AmountOfSubstanceType</p>
+
+<p id="_"><strong>Description:</strong> Type of the quantity amount of substance.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="complex_type_LuminousIntensityType"><strong>Complex Type:</strong> LuminousIntensityType</p>
+
+<p id="_"><strong>Description:</strong> Type of the quantity luminous intensity.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="complex_type_PlaneAngleType"><strong>Complex Type:</strong> PlaneAngleType</p>
+
+<p id="_"><strong>Description:</strong> Type of the quantity plane angle.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="complex_type_ItemType"><strong>Complex Type:</strong> ItemType</p>
+
+<p id="_"><strong>Description:</strong> Type of the quantity represented by a counted item, e.g., electron</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="complex_type_PrefixSetType"><strong>Complex Type:</strong> PrefixSetType</p>
+
+<p id="_"><strong>Description:</strong> Type for container for prefixes.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="complex_type_PrefixType"><strong>Complex Type:</strong> PrefixType</p>
+
+<p id="_"><strong>Description:</strong> Type for element for describing prefixes. Use in container PrefixSet.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="complex_type_NameType"><strong>Complex Type:</strong> NameType</p>
+
+<p id="_"><strong>Description:</strong> Type for name.  Used for names in units, quantities, and prefixes.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="complex_type_SystemType"><strong>Complex Type:</strong> SystemType</p>
+
+<p id="_"><strong>Description:</strong> Type for unit system.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="complex_type_SymbolType"><strong>Complex Type:</strong> SymbolType</p>
+
+<p id="_"><strong>Description:</strong> Type for symbols.  Used in units, quantities, and prefixes.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="complex_type_NoteType"><strong>Complex Type:</strong> NoteType</p>
+
+<p id="_"><strong>Description:</strong> Type for notes.  Used in units and conversion factors.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="complex_type_DefinitionType"><strong>Complex Type:</strong> DefinitionType</p>
+
+<p id="_"><strong>Description:</strong> Type for definition.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="complex_type_HistoryType"><strong>Complex Type:</strong> HistoryType</p>
+
+<p id="_"><strong>Description:</strong> Type for history.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="complex_type_RemarkType"><strong>Complex Type:</strong> RemarkType</p>
+
+<p id="_"><strong>Description:</strong> Type for remark.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="complex_type_ReferenceType"><strong>Complex Type:</strong> ReferenceType</p>
+
+<p id="_"><strong>Description:</strong> Type for reference to a unit or quantity.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/></clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Attribute Groups</title>
+<p id="_" anchor="attribute_group_initialUnit"><strong>Attribute Group:</strong> initialUnit</p>
+
+<p id="_"><strong>Description:</strong> URI indicating the unitID of the starting unit for the conversion. For units which are defined in the same document, the URI should consist of a pound sign (#) followed by the ID value.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="attribute_group_sourceName"><strong>Attribute Group:</strong> sourceName</p>
+
+<p id="_"><strong>Description:</strong> Name of relevant publication.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="attribute_group_sourceURL"><strong>Attribute Group:</strong> sourceURL</p>
+
+<p id="_"><strong>Description:</strong> Relevant URL for available information.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="attribute_group_powerRational"><strong>Attribute Group:</strong> powerRational</p>
+
+<p id="_"><strong>Description:</strong> An exponent of the unit, specified as powerNumerator and powerDenominator.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="attribute_group_prefix"><strong>Attribute Group:</strong> prefix</p>
+
+<p id="_"><strong>Description:</strong> Prefix identifier; e.g., m, k, M, G.  [Enumeration order is by prefix magnitude (Y to y) followed by binary prefixes.]</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/>
+<p id="_" anchor="attribute_group_dimensionURL"><strong>Attribute Group:</strong> dimensionURL</p>
+
+<p id="_"><strong>Description:</strong> URL to a representation of the unit or quantity in terms of the 7 SI base dimensions.</p>
+
+<p id="_"><xref target="top" style="short"><display-text>⌃</display-text></xref></p>
+
+<hr/></clause>
+</sections>
+</metanorma>
diff --git a/spec/fixtures/lutaml/unitsml_expected.xml b/spec/fixtures/lutaml/unitsml_expected.xml
new file mode 100644
index 00000000..d04f771e
--- /dev/null
+++ b/spec/fixtures/lutaml/unitsml_expected.xml
@@ -0,0 +1,577 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<metanorma xmlns="https://www.metanorma.org/ns/standoc" type="semantic" version="3.4.2" flavor="standoc">
+<bibdata type="standard">
+<title language="en" type="main">Document title</title>
+<language>en</language><script>Latn</script><status><stage>published</stage></status><copyright><from>2026</from></copyright><ext><doctype>standard</doctype><flavor>standoc</flavor></ext></bibdata><metanorma-extension><semantic-metadata><stage-published>true</stage-published></semantic-metadata>
+<presentation-metadata><toc-heading-levels>2</toc-heading-levels><html-toc-heading-levels>2</html-toc-heading-levels><doc-toc-heading-levels>2</doc-toc-heading-levels><pdf-toc-heading-levels>2</pdf-toc-heading-levels></presentation-metadata></metanorma-extension>
+<sections><clause id="_" anchor="top" inline-header="false" obligation="normative">
+<title id="_">XSD Templates</title>
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Elements</title>
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>UnitsML</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>UnitSet</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>Unit</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>UnitSystem</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>UnitName</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>UnitSymbol</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>UnitVersionHistory</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>CodeListValue</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>RootUnits</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>EnumeratedRootUnit</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>ExternalRootUnit</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>Conversions</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>Float64ConversionFrom</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>ConversionNote</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>SpecialConversionFrom</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>WSDLConversionFrom</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>WSDLDescription</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>ConversionDescription</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>QuantityReference</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>UnitDefinition</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>UnitHistory</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>UnitRemark</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>CountedItemSet</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>CountedItem</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>ItemName</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>ItemSymbol</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>ItemVersionHistory</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>ItemDefinition</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>ItemHistory</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>ItemRemark</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>QuantitySet</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>Quantity</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>QuantityName</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>QuantitySymbol</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>UnitReference</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>QuantityVersionHistory</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>QuantityDefinition</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>QuantityHistory</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>QuantityRemark</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>DimensionSet</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>Dimension</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>Length</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>Mass</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>Time</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>ElectricCurrent</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>ThermodynamicTemperature</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>AmountOfSubstance</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>LuminousIntensity</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>PlaneAngle</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>Item</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>PrefixSet</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>Prefix</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>PrefixName</strong></title>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Element: <strong>PrefixSymbol</strong></title>
+</clause>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Complex Types</title>
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Complex Type: <strong>UnitsMLType</strong></title>
+<dl id="_"><dt><strong>Used By</strong></dt>
+<dd id="_"><p id="_">UnitsML</p>
+</dd>
+</dl>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Complex Type: <strong>UnitSetType</strong></title>
+<dl id="_"><dt><strong>Used By</strong></dt>
+<dd id="_"><p id="_">UnitSet</p>
+</dd>
+</dl>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Complex Type: <strong>UnitType</strong></title>
+<dl id="_"><dt><strong>Used By</strong></dt>
+<dd id="_"><p id="_">Unit</p>
+</dd>
+</dl>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Complex Type: <strong>CodeListValueType</strong></title>
+<dl id="_"><dt><strong>Used By</strong></dt>
+<dd id="_"><p id="_">CodeListValue</p>
+</dd>
+</dl>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Complex Type: <strong>RootUnitsType</strong></title>
+<dl id="_"><dt><strong>Used By</strong></dt>
+<dd id="_"><p id="_">RootUnits</p>
+</dd>
+</dl>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Complex Type: <strong>EnumeratedRootUnitType</strong></title>
+<dl id="_"><dt><strong>Used By</strong></dt>
+<dd id="_"><p id="_">EnumeratedRootUnit</p>
+</dd>
+</dl>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Complex Type: <strong>ExternalRootUnitType</strong></title>
+<dl id="_"><dt><strong>Used By</strong></dt>
+<dd id="_"><p id="_">ExternalRootUnit</p>
+</dd>
+</dl>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Complex Type: <strong>ConversionsType</strong></title>
+<dl id="_"><dt><strong>Used By</strong></dt>
+<dd id="_"><p id="_">Conversions</p>
+</dd>
+</dl>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Complex Type: <strong>Float64ConversionFromType</strong></title>
+<dl id="_"><dt><strong>Used By</strong></dt>
+<dd id="_"><p id="_">Float64ConversionFrom</p>
+</dd>
+</dl>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Complex Type: <strong>SpecialConversionFromType</strong></title>
+<dl id="_"><dt><strong>Used By</strong></dt>
+<dd id="_"><p id="_">SpecialConversionFrom</p>
+</dd>
+</dl>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Complex Type: <strong>WSDLConversionFromType</strong></title>
+<dl id="_"><dt><strong>Used By</strong></dt>
+<dd id="_"><p id="_">WSDLConversionFrom</p>
+</dd>
+</dl>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Complex Type: <strong>CountedItemSetType</strong></title>
+<dl id="_"><dt><strong>Used By</strong></dt>
+<dd id="_"><p id="_">CountedItemSet</p>
+</dd>
+</dl>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Complex Type: <strong>CountedItemType</strong></title>
+<dl id="_"><dt><strong>Used By</strong></dt>
+<dd id="_"><p id="_">CountedItem</p>
+</dd>
+</dl>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Complex Type: <strong>QuantitySetType</strong></title>
+<dl id="_"><dt><strong>Used By</strong></dt>
+<dd id="_"><p id="_">QuantitySet</p>
+</dd>
+</dl>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Complex Type: <strong>QuantityType</strong></title>
+<dl id="_"><dt><strong>Used By</strong></dt>
+<dd id="_"><p id="_">Quantity</p>
+</dd>
+</dl>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Complex Type: <strong>DimensionSetType</strong></title>
+<dl id="_"><dt><strong>Used By</strong></dt>
+<dd id="_"><p id="_">DimensionSet</p>
+</dd>
+</dl>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Complex Type: <strong>DimensionType</strong></title>
+<dl id="_"><dt><strong>Used By</strong></dt>
+<dd id="_"><p id="_">Dimension</p>
+</dd>
+</dl>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Complex Type: <strong>LengthType</strong></title>
+<dl id="_"><dt><strong>Used By</strong></dt>
+<dd id="_"><p id="_">Length</p>
+</dd>
+</dl>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Complex Type: <strong>MassType</strong></title>
+<dl id="_"><dt><strong>Used By</strong></dt>
+<dd id="_"><p id="_">Mass</p>
+</dd>
+</dl>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Complex Type: <strong>TimeType</strong></title>
+<dl id="_"><dt><strong>Used By</strong></dt>
+<dd id="_"><p id="_">Time</p>
+</dd>
+</dl>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Complex Type: <strong>ElectricCurrentType</strong></title>
+<dl id="_"><dt><strong>Used By</strong></dt>
+<dd id="_"><p id="_">ElectricCurrent</p>
+</dd>
+</dl>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Complex Type: <strong>ThermodynamicTemperatureType</strong></title>
+<dl id="_"><dt><strong>Used By</strong></dt>
+<dd id="_"><p id="_">ThermodynamicTemperature</p>
+</dd>
+</dl>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Complex Type: <strong>AmountOfSubstanceType</strong></title>
+<dl id="_"><dt><strong>Used By</strong></dt>
+<dd id="_"><p id="_">AmountOfSubstance</p>
+</dd>
+</dl>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Complex Type: <strong>LuminousIntensityType</strong></title>
+<dl id="_"><dt><strong>Used By</strong></dt>
+<dd id="_"><p id="_">LuminousIntensity</p>
+</dd>
+</dl>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Complex Type: <strong>PlaneAngleType</strong></title>
+<dl id="_"><dt><strong>Used By</strong></dt>
+<dd id="_"><p id="_">PlaneAngle</p>
+</dd>
+</dl>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Complex Type: <strong>ItemType</strong></title>
+<dl id="_"><dt><strong>Used By</strong></dt>
+<dd id="_"><p id="_">Item</p>
+</dd>
+</dl>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Complex Type: <strong>PrefixSetType</strong></title>
+<dl id="_"><dt><strong>Used By</strong></dt>
+<dd id="_"><p id="_">PrefixSet</p>
+</dd>
+</dl>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Complex Type: <strong>PrefixType</strong></title>
+<dl id="_"><dt><strong>Used By</strong></dt>
+<dd id="_"><p id="_">Prefix</p>
+</dd>
+</dl>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Complex Type: <strong>NameType</strong></title>
+<dl id="_"><dt><strong>Used By</strong></dt>
+<dd id="_"><p id="_">UnitName, ItemName, QuantityName, PrefixName</p>
+</dd>
+</dl>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Complex Type: <strong>SystemType</strong></title>
+<dl id="_"><dt><strong>Used By</strong></dt>
+<dd id="_"><p id="_">UnitSystem</p>
+</dd>
+</dl>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Complex Type: <strong>SymbolType</strong></title>
+<dl id="_"><dt><strong>Used By</strong></dt>
+<dd id="_"><p id="_">UnitSymbol, ItemSymbol, QuantitySymbol, PrefixSymbol</p>
+</dd>
+</dl>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Complex Type: <strong>NoteType</strong></title>
+<dl id="_"><dt><strong>Used By</strong></dt>
+<dd id="_"><p id="_">UnitVersionHistory, ConversionNote, WSDLDescription, ConversionDescription, ItemVersionHistory, QuantityVersionHistory</p>
+</dd>
+</dl>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Complex Type: <strong>DefinitionType</strong></title>
+<dl id="_"><dt><strong>Used By</strong></dt>
+<dd id="_"><p id="_">UnitDefinition, ItemDefinition, QuantityDefinition</p>
+</dd>
+</dl>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Complex Type: <strong>HistoryType</strong></title>
+<dl id="_"><dt><strong>Used By</strong></dt>
+<dd id="_"><p id="_">UnitHistory, ItemHistory, QuantityHistory</p>
+</dd>
+</dl>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Complex Type: <strong>RemarkType</strong></title>
+<dl id="_"><dt><strong>Used By</strong></dt>
+<dd id="_"><p id="_">UnitRemark, ItemRemark, QuantityRemark</p>
+</dd>
+</dl>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Complex Type: <strong>ReferenceType</strong></title>
+<dl id="_"><dt><strong>Used By</strong></dt>
+<dd id="_"><p id="_">QuantityReference, UnitReference</p>
+</dd>
+</dl>
+</clause>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">Attribute Groups</title>
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">initialUnit</title>
+<dl id="_"><dt><strong>Used By</strong></dt>
+<dd id="_"><p id="_">Float64ConversionFromType, SpecialConversionFromType, WSDLConversionFromType</p>
+<figure id="_"><pre id="_"/></figure>
+</dd>
+</dl>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">sourceName</title>
+<dl id="_"><dt><strong>Used By</strong></dt>
+<dd id="_"><p id="_">DefinitionType, HistoryType, RemarkType</p>
+<figure id="_"><pre id="_"/></figure>
+</dd>
+</dl>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">sourceURL</title>
+<dl id="_"><dt><strong>Used By</strong></dt>
+<dd id="_"><p id="_">EnumeratedRootUnitType, ExternalRootUnitType, DefinitionType, HistoryType, RemarkType</p>
+<figure id="_"><pre id="_"/></figure>
+</dd>
+</dl>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">powerRational</title>
+<dl id="_"><dt><strong>Used By</strong></dt>
+<dd id="_"><p id="_">EnumeratedRootUnitType, ExternalRootUnitType, LengthType, MassType, TimeType, ElectricCurrentType, ThermodynamicTemperatureType, AmountOfSubstanceType, LuminousIntensityType, PlaneAngleType, ItemType</p>
+<figure id="_"><pre id="_"/></figure>
+</dd>
+</dl>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">prefix</title>
+<dl id="_"><dt><strong>Used By</strong></dt>
+<dd id="_"><p id="_">EnumeratedRootUnitType, ExternalRootUnitType</p>
+<figure id="_"><pre id="_"/></figure>
+</dd>
+</dl>
+</clause>
+
+<clause id="_" inline-header="false" obligation="normative">
+<title id="_">dimensionURL</title>
+<dl id="_"><dt><strong>Used By</strong></dt>
+<dd id="_"><p id="_">UnitType, QuantityType</p>
+<figure id="_"><pre id="_"/></figure>
+</dd>
+</dl>
+</clause>
+</clause>
+</clause>
+</sections>
+</metanorma>
diff --git a/spec/metanorma/plugin/lutaml/lutaml_xsd_preprocessor_spec.rb b/spec/metanorma/plugin/lutaml/lutaml_xsd_preprocessor_spec.rb
index 16f9d47e..0965ced9 100644
--- a/spec/metanorma/plugin/lutaml/lutaml_xsd_preprocessor_spec.rb
+++ b/spec/metanorma/plugin/lutaml/lutaml_xsd_preprocessor_spec.rb
@@ -176,5 +176,241 @@ def expected_fragments
         ).reject(&:empty?)
       end
     end
+
+    context "with UnitsML schema elements and complex types" do
+      let(:unitsml_path) { fixtures_path("xsd_schemas/unitsml-v1.0-csd04.xsd") }
+
+      let(:input) do
+        <<~TEXT
+          = Document title
+
+          = Elements
+          [lutaml_xsd,#{unitsml_path},unitsml]
+          ----
+          {% for element in unitsml.element %}
+
+          Name: *{{ element.name }}*
+
+          Type: *{{ element.type }}*
+          {% endfor %}
+          ----
+
+          = ComplexTypes
+          [lutaml_xsd,#{unitsml_path},unitsml]
+          ----
+          {% for complex_type in unitsml.complex_type %}
+
+          Name: *{{ complex_type.name }}*
+
+          Description: {{ complex_type.annotation.documentation.first.content }}
+          {% endfor %}
+          ----
+        TEXT
+      end
+
+      let(:expected_output) do
+        File.read(fixtures_path("first-unitsml-expected-output-v1.0-csd04.xml"))
+      end
+
+      it "correctly renders input" do
+        expect_equivalent_document(
+          xml_string_content(metanorma_convert(input)),
+          expected_output,
+        )
+      end
+    end
+
+    context "with OMML schema elements and complex types" do
+      let(:omml_path) { fixtures_path("xsd_schemas/omml.xsd") }
+      let(:omml_dir) { File.dirname(omml_path) }
+
+      let(:input) do
+        <<~TEXT
+          = Document title
+
+          = Elements
+          [lutaml_xsd,#{omml_path},omml, location=#{omml_dir}]
+          ----
+          {% for element in omml.element %}
+
+          Name: *{{ element.name }}*
+          Type: *{{ element.type }}*
+          {% endfor %}
+          ----
+
+          = ComplexTypes
+          [lutaml_xsd,#{omml_path},omml]
+          ----
+          {% for complex_type in omml.complex_type %}
+
+          Name: *{{ complex_type.name }}*
+          Description: {{ complex_type.annotation.documentation.first.content }}
+          {% endfor %}
+          ----
+        TEXT
+      end
+
+      let(:expected_output) do
+        File.read(fixtures_path("minimal-unitsml-expected-output-v1.0-csd04.xml"))
+      end
+
+      it "correctly renders input" do
+        expect_equivalent_document(
+          xml_string_content(metanorma_convert(input)),
+          expected_output,
+        )
+      end
+    end
+
+    context "with UnitsML schema documentation via block syntax" do
+      let(:unitsml_path) { fixtures_path("xsd_schemas/unitsml-v1.0-csd04.xsd") }
+
+      let(:input) do
+        <<~TEXT
+          = Document title
+
+          [#top]
+          = Units Markup language (UnitsML) Schema Documentation unitsml-v1.0
+
+          = Elements
+          [lutaml_xsd,#{unitsml_path},unitsml]
+          ----
+          {% for element in unitsml.element %}
+
+          [#element_{{element.name}}]
+
+          *Element:* {{ element.name }}
+
+          *Type:* <<complex_type_{{element.type}},{{ element.type }}>>
+
+          *Description:* {{ element.annotation.documentation.first.content }}
+
+          <<#top, &#x2303;>>
+
+          ---
+          {% endfor %}
+
+          = Complex Types
+          {% for complex_type in unitsml.complex_type %}
+
+          [#complex_type_{{complex_type.name}}]
+
+          *Complex Type:* {{ complex_type.name }}
+
+          *Description:* {{ complex_type.annotation.documentation.first.content }}
+
+          <<#top, &#x2303;>>
+
+          ---
+          {% endfor %}
+
+          = Attribute Groups
+          {% for attribute_group in unitsml.attribute_group %}
+
+          [#attribute_group_{{attribute_group.name}}]
+
+          *Attribute Group:* {{ attribute_group.name }}
+
+          *Description:* {{ attribute_group.annotation.documentation.first.content }}
+
+          <<#top, &#x2303;>>
+
+          ---
+          {% endfor %}
+          ----
+        TEXT
+      end
+
+      let(:expected_output) do
+        File.read(fixtures_path("unitsml-expected-output-v1.0-csd04.xml"))
+      end
+
+      it "correctly renders input" do
+        expect_equivalent_document(
+          xml_string_content(metanorma_convert(input)),
+          expected_output,
+        )
+      end
+    end
+
+    context "with XSD direct block syntax (lutaml_xsd::)" do
+      let(:unitsml_path) do
+        fixtures_path("xsd_schemas/unitsml-v1.0-csd04.xsd")
+      end
+      let(:template_path) do
+        fixtures_path("unitsml_liquid_templates/schema.adoc")
+      end
+      let(:include_path) do
+        fixtures_path("unitsml_liquid_templates")
+      end
+
+      let(:input) do
+        <<~TEXT
+          = Document title
+
+          [#top]
+          = XSD Templates
+
+          lutaml_xsd::#{unitsml_path}[schema, #{template_path}, include_path=#{include_path}]
+        TEXT
+      end
+
+      let(:expected_output) do
+        File.read(fixtures_path("unitsml_expected.xml"))
+      end
+
+      it "correctly renders input using external Liquid template" do
+        expect_equivalent_document(
+          xml_string_content(metanorma_convert(input)),
+          expected_output,
+        )
+      end
+
+      context "with a missing template file" do
+        let(:input) do
+          <<~TEXT
+            = Document title
+
+            lutaml_xsd::#{unitsml_path}[schema, nonexistent.adoc]
+          TEXT
+        end
+
+        it "raises a file-not-found error" do
+          expect { metanorma_convert(input) }.to raise_error(Errno::ENOENT)
+        end
+      end
+
+      context "when a block header follows a direct block" do
+        let(:input) do
+          <<~TEXT
+            = Document title
+
+            lutaml_xsd::#{unitsml_path}[schema, #{template_path}, include_path=#{include_path}]
+
+            [lutaml_xsd,#{fixtures_path('xsd_schemas/person.xsd')},person]
+            ----
+            Person element count: {{ person.element.size }}
+            ----
+          TEXT
+        end
+
+        it "renders both syntaxes in the same document" do
+          rendered = xml_string_content(metanorma_convert(input))
+          expect(rendered).to include("Element:")
+          expect(rendered).to include("Person element count: 1")
+        end
+      end
+    end
+
+    def expect_equivalent_document(actual, expected)
+      expect(normalize_metanorma_header(actual))
+        .to(be_equivalent_to(normalize_metanorma_header(expected)))
+    end
+
+    def normalize_metanorma_header(xml)
+      xml
+        .sub(/(<metanorma\b[^>]*\bversion=)"[^"]+"/, '\1"_"')
+        .sub(%r{(<copyright>\s*<from>)\d{4}(</from>)}, '\1_\2')
+    end
   end
 end