diff --git a/changes/1484.feature b/changes/1484.feature
new file mode 100644
index 000000000..c88896fae
--- /dev/null
+++ b/changes/1484.feature
@@ -0,0 +1 @@
+Added validation to the `digital_object_identifier` Dataset field.
diff --git a/ckanext/canada/i18n/ckanext-canada.pot b/ckanext/canada/i18n/ckanext-canada.pot
index 7dc11bb30..fa7fa8f03 100644
--- a/ckanext/canada/i18n/ckanext-canada.pot
+++ b/ckanext/canada/i18n/ckanext-canada.pot
@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: ckanext-canada 0.4.0\n"
 "Report-Msgid-Bugs-To: EMAIL@ADDRESS\n"
-"POT-Creation-Date: 2024-06-25 17:26+0000\n"
+"POT-Creation-Date: 2024-06-25 18:45+0000\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -255,12 +255,12 @@ msgstr ""
 msgid "Suggestion Status"
 msgstr ""
 
-#: ckanext/canada/plugins.py:899
+#: ckanext/canada/plugins.py:901
 #: ckanext/canada/templates/public/package/snippets/resource_form.html:8
 msgid "Previous"
 msgstr ""
 
-#: ckanext/canada/plugins.py:899
+#: ckanext/canada/plugins.py:901
 msgid "Next"
 msgstr ""
 
@@ -546,75 +546,79 @@ msgstr ""
 msgid "Open Government Portal (staging)"
 msgstr ""
 
-#: ckanext/canada/validators.py:118
+#: ckanext/canada/validators.py:151
 #, python-format
 msgid "Tag \"%s\" length is less than minimum %s"
 msgstr ""
 
-#: ckanext/canada/validators.py:122
+#: ckanext/canada/validators.py:155
 #, python-format
 msgid "Tag \"%s\" length is more than maximum %i"
 msgstr ""
 
-#: ckanext/canada/validators.py:126
+#: ckanext/canada/validators.py:159
 #, python-format
 msgid "Tag \"%s\" may not contain consecutive spaces"
 msgstr ""
 
-#: ckanext/canada/validators.py:133
+#: ckanext/canada/validators.py:166
 #, python-format
 msgid "Tag \"%s\" may not contain unprintable character U+%04x"
 msgstr ""
 
-#: ckanext/canada/validators.py:137
+#: ckanext/canada/validators.py:170
 #, python-format
 msgid "Tag \"%s\" may not contain separator charater U+%04x"
 msgstr ""
 
-#: ckanext/canada/validators.py:153
+#: ckanext/canada/validators.py:186
 msgid "Badly formed hexadecimal UUID string"
 msgstr ""
 
 #: ckanext/canada/templates/internal/user/new_user_form.html:6
-#: ckanext/canada/validators.py:165 ckanext/canada/validators.py:167
+#: ckanext/canada/validators.py:198 ckanext/canada/validators.py:200
 msgid "Please enter a valid email address."
 msgstr ""
 
-#: ckanext/canada/validators.py:182
+#: ckanext/canada/validators.py:215
 msgid "Invalid GeoJSON"
 msgstr ""
 
-#: ckanext/canada/validators.py:259
+#: ckanext/canada/validators.py:292
 msgid "Date may not be in the future when this record is marked ready to publish"
 msgstr ""
 
-#: ckanext/canada/validators.py:336
+#: ckanext/canada/validators.py:369
 msgid "Date format incorrect. Expecting YYYY-MM-DD"
 msgstr ""
 
-#: ckanext/canada/validators.py:350 ckanext/canada/validators.py:364
+#: ckanext/canada/validators.py:383 ckanext/canada/validators.py:397
 msgid "Must be a Unicode string value"
 msgstr ""
 
-#: ckanext/canada/validators.py:371 ckanext/canada/validators.py:382
+#: ckanext/canada/validators.py:404 ckanext/canada/validators.py:415
 msgid "Must be a JSON string"
 msgstr ""
 
-#: ckanext/canada/validators.py:378
+#: ckanext/canada/validators.py:411
 msgid "JSON object must contain \"en\" key"
 msgstr ""
 
-#: ckanext/canada/validators.py:380
+#: ckanext/canada/validators.py:413
 msgid "JSON object must contain \"fr\" key"
 msgstr ""
 
-#: ckanext/canada/validators.py:532
+#: ckanext/canada/validators.py:565
 #, python-format
 msgid ""
 "Cannot change value of registry_access field from '%s' to '%s'. This field is"
 " read-only."
 msgstr ""
 
+#: ckanext/canada/validators.py:573
+msgid "Invalid value for a digital object identifier."
+msgstr ""
+
 #: ckanext/canada/view.py:99
 msgid "<strong>Note</strong><br>{0} is now logged in"
 msgstr ""
diff --git a/ckanext/canada/i18n/en/LC_MESSAGES/ckanext-canada.po b/ckanext/canada/i18n/en/LC_MESSAGES/ckanext-canada.po
index 697968923..705975fc3 100644
--- a/ckanext/canada/i18n/en/LC_MESSAGES/ckanext-canada.po
+++ b/ckanext/canada/i18n/en/LC_MESSAGES/ckanext-canada.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version:  CKAN\n"
 "Report-Msgid-Bugs-To: EMAIL@ADDRESS\n"
-"POT-Creation-Date: 2024-06-25 17:26+0000\n"
+"POT-Creation-Date: 2024-06-25 18:45+0000\n"
 "PO-Revision-Date: 2014-01-23 13:04+0000\n"
 "Last-Translator: Sean Hammond <sean.hammond@okfn.org>\n"
 "Language: en\n"
@@ -263,12 +263,12 @@ msgstr ""
 msgid "Suggestion Status"
 msgstr ""
 
-#: ckanext/canada/plugins.py:899
+#: ckanext/canada/plugins.py:901
 #: ckanext/canada/templates/public/package/snippets/resource_form.html:8
 msgid "Previous"
 msgstr ""
 
-#: ckanext/canada/plugins.py:899
+#: ckanext/canada/plugins.py:901
 msgid "Next"
 msgstr ""
 
@@ -556,75 +556,79 @@ msgstr ""
 msgid "Open Government Portal (staging)"
 msgstr ""
 
-#: ckanext/canada/validators.py:118
+#: ckanext/canada/validators.py:151
 #, python-format
 msgid "Tag \"%s\" length is less than minimum %s"
 msgstr ""
 
-#: ckanext/canada/validators.py:122
+#: ckanext/canada/validators.py:155
 #, python-format
 msgid "Tag \"%s\" length is more than maximum %i"
 msgstr ""
 
-#: ckanext/canada/validators.py:126
+#: ckanext/canada/validators.py:159
 #, python-format
 msgid "Tag \"%s\" may not contain consecutive spaces"
 msgstr ""
 
-#: ckanext/canada/validators.py:133
+#: ckanext/canada/validators.py:166
 #, python-format
 msgid "Tag \"%s\" may not contain unprintable character U+%04x"
 msgstr ""
 
-#: ckanext/canada/validators.py:137
+#: ckanext/canada/validators.py:170
 #, python-format
 msgid "Tag \"%s\" may not contain separator charater U+%04x"
 msgstr ""
 
-#: ckanext/canada/validators.py:153
+#: ckanext/canada/validators.py:186
 msgid "Badly formed hexadecimal UUID string"
 msgstr ""
 
 #: ckanext/canada/templates/internal/user/new_user_form.html:6
-#: ckanext/canada/validators.py:165 ckanext/canada/validators.py:167
+#: ckanext/canada/validators.py:198 ckanext/canada/validators.py:200
 msgid "Please enter a valid email address."
 msgstr ""
 
-#: ckanext/canada/validators.py:182
+#: ckanext/canada/validators.py:215
 msgid "Invalid GeoJSON"
 msgstr ""
 
-#: ckanext/canada/validators.py:259
+#: ckanext/canada/validators.py:292
 msgid "Date may not be in the future when this record is marked ready to publish"
 msgstr ""
 
-#: ckanext/canada/validators.py:336
+#: ckanext/canada/validators.py:369
 msgid "Date format incorrect. Expecting YYYY-MM-DD"
 msgstr ""
 
-#: ckanext/canada/validators.py:350 ckanext/canada/validators.py:364
+#: ckanext/canada/validators.py:383 ckanext/canada/validators.py:397
 msgid "Must be a Unicode string value"
 msgstr ""
 
-#: ckanext/canada/validators.py:371 ckanext/canada/validators.py:382
+#: ckanext/canada/validators.py:404 ckanext/canada/validators.py:415
 msgid "Must be a JSON string"
 msgstr ""
 
-#: ckanext/canada/validators.py:378
+#: ckanext/canada/validators.py:411
 msgid "JSON object must contain \"en\" key"
 msgstr ""
 
-#: ckanext/canada/validators.py:380
+#: ckanext/canada/validators.py:413
 msgid "JSON object must contain \"fr\" key"
 msgstr ""
 
-#: ckanext/canada/validators.py:532
+#: ckanext/canada/validators.py:565
 #, python-format
 msgid ""
 "Cannot change value of registry_access field from '%s' to '%s'. This "
 "field is read-only."
 msgstr ""
 
+#: ckanext/canada/validators.py:573
+msgid "Invalid value for a digital object identifier."
+msgstr ""
+
 #: ckanext/canada/view.py:99
 msgid "<strong>Note</strong><br>{0} is now logged in"
 msgstr ""
diff --git a/ckanext/canada/i18n/fr/LC_MESSAGES/ckanext-canada.po b/ckanext/canada/i18n/fr/LC_MESSAGES/ckanext-canada.po
index 87cc1715b..d0ddfcd05 100644
--- a/ckanext/canada/i18n/fr/LC_MESSAGES/ckanext-canada.po
+++ b/ckanext/canada/i18n/fr/LC_MESSAGES/ckanext-canada.po
@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PROJECT VERSION\n"
 "Report-Msgid-Bugs-To: EMAIL@ADDRESS\n"
-"POT-Creation-Date: 2024-06-25 17:26+0000\n"
+"POT-Creation-Date: 2024-06-25 18:45+0000\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language: fr\n"
@@ -275,12 +275,12 @@ msgstr "Juridiction"
 msgid "Suggestion Status"
 msgstr "État de la suggestion"
 
-#: ckanext/canada/plugins.py:899
+#: ckanext/canada/plugins.py:901
 #: ckanext/canada/templates/public/package/snippets/resource_form.html:8
 msgid "Previous"
 msgstr "Précédent"
 
-#: ckanext/canada/plugins.py:899
+#: ckanext/canada/plugins.py:901
 msgid "Next"
 msgstr "Suivant"
 
@@ -581,71 +581,71 @@ msgstr "Portail du gouvernement ouvert"
 msgid "Open Government Portal (staging)"
 msgstr "Portail du gouvernement ouvert (stadification)"
 
-#: ckanext/canada/validators.py:118
+#: ckanext/canada/validators.py:151
 #, python-format
 msgid "Tag \"%s\" length is less than minimum %s"
 msgstr "La longueur de la balise \"%s\" est inférieure au minimum %s"
 
-#: ckanext/canada/validators.py:122
+#: ckanext/canada/validators.py:155
 #, python-format
 msgid "Tag \"%s\" length is more than maximum %i"
 msgstr "La longueur de la balise \"%s\" est supérieure au maximum %i"
 
-#: ckanext/canada/validators.py:126
+#: ckanext/canada/validators.py:159
 #, python-format
 msgid "Tag \"%s\" may not contain consecutive spaces"
 msgstr "La balise \"%s\" ne peut pas contenir d’espaces consécutifs"
 
-#: ckanext/canada/validators.py:133
+#: ckanext/canada/validators.py:166
 #, python-format
 msgid "Tag \"%s\" may not contain unprintable character U+%04x"
 msgstr "La balise \"%s\" ne peut pas contenir de caractères non imprimables U+%04x"
 
-#: ckanext/canada/validators.py:137
+#: ckanext/canada/validators.py:170
 #, python-format
 msgid "Tag \"%s\" may not contain separator charater U+%04x"
 msgstr "La balise \"%s\"ne peut pas contenir de caractères séparateurs U+%04x"
 
-#: ckanext/canada/validators.py:153
+#: ckanext/canada/validators.py:186
 msgid "Badly formed hexadecimal UUID string"
 msgstr "Chaîne UUID hexadécimale mal formée"
 
 #: ckanext/canada/templates/internal/user/new_user_form.html:6
-#: ckanext/canada/validators.py:165 ckanext/canada/validators.py:167
+#: ckanext/canada/validators.py:198 ckanext/canada/validators.py:200
 msgid "Please enter a valid email address."
 msgstr "S’il vous plaît, mettez une adresse email valide."
 
-#: ckanext/canada/validators.py:182
+#: ckanext/canada/validators.py:215
 msgid "Invalid GeoJSON"
 msgstr "GeoJSON invalide"
 
-#: ckanext/canada/validators.py:259
+#: ckanext/canada/validators.py:292
 msgid "Date may not be in the future when this record is marked ready to publish"
 msgstr ""
 "Une fois que ce document est marqué comme étant prêt à publier, la date "
 "ne peut pas être dans le futur"
 
-#: ckanext/canada/validators.py:336
+#: ckanext/canada/validators.py:369
 msgid "Date format incorrect. Expecting YYYY-MM-DD"
 msgstr "Le format de la date est incorrect. Il devrait être AAAA-MM-JJ"
 
-#: ckanext/canada/validators.py:350 ckanext/canada/validators.py:364
+#: ckanext/canada/validators.py:383 ckanext/canada/validators.py:397
 msgid "Must be a Unicode string value"
 msgstr "Doit être une chaîne de caractères Unicode"
 
-#: ckanext/canada/validators.py:371 ckanext/canada/validators.py:382
+#: ckanext/canada/validators.py:404 ckanext/canada/validators.py:415
 msgid "Must be a JSON string"
 msgstr "Doit être une chaîne JSON"
 
-#: ckanext/canada/validators.py:378
+#: ckanext/canada/validators.py:411
 msgid "JSON object must contain \"en\" key"
 msgstr "L’objet JSON doit contenir la clé \"en\""
 
-#: ckanext/canada/validators.py:380
+#: ckanext/canada/validators.py:413
 msgid "JSON object must contain \"fr\" key"
 msgstr "L’objet JSON doit contenir la clé \"fr\""
 
-#: ckanext/canada/validators.py:532
+#: ckanext/canada/validators.py:565
 #, python-format
 msgid ""
 "Cannot change value of registry_access field from '%s' to '%s'. This "
@@ -654,6 +654,10 @@ msgstr ""
 "Impossible de modifier la valeur du champ d’accès au registre de '%s' à "
 "'%s'. Ce champ ne sert qu’à des fins de lecture."
 
+#: ckanext/canada/validators.py:573
+msgid "Invalid value for a digital object identifier."
+msgstr "Valeur non valide pour un identifiant d’objet numérique."
+
 #: ckanext/canada/view.py:99
 msgid "<strong>Note</strong><br>{0} is now logged in"
 msgstr "<strong>Note</strong><br />{0} est maintenant connecté"
diff --git a/ckanext/canada/plugins.py b/ckanext/canada/plugins.py
index a97bf2a7b..d45e8c480 100755
--- a/ckanext/canada/plugins.py
+++ b/ckanext/canada/plugins.py
@@ -862,6 +862,8 @@ def get_validators(self):
                 validators.canada_output_none,
             'protect_registry_access':
                 validators.protect_registry_access,
+            'digital_object_identifier':
+                validators.digital_object_identifier,
             }
 
 
diff --git a/ckanext/canada/schemas/presets.yaml b/ckanext/canada/schemas/presets.yaml
index 400be5296..f14a96580 100644
--- a/ckanext/canada/schemas/presets.yaml
+++ b/ckanext/canada/schemas/presets.yaml
@@ -2329,7 +2329,7 @@ presets:
 
 
 # Field = Digital Object Identifier (DOI).
-# {The Digital Object Identifier assigned to the dataset. For more information visit: http://cisti-icist.nrc-cnrc.gc.ca/eng/services/cisti/datacite-canada/index.html}
+# {The Digital Object Identifier assigned to the dataset. For more information visit: https://support.datacite.org/docs/doi-basics}
 - preset_name: canada_digital_object_identifier
   values:
     field_name: digital_object_identifier
@@ -2337,9 +2337,10 @@ presets:
       en: Digital Object Identifier (DOI)
       fr: Identificateur d’objet numérique
     help_text:
-      en: "The Digital Object Identifier assigned to the dataset. For more information visit: http://cisti-icist.nrc-cnrc.gc.ca/eng/services/cisti/datacite-canada/index.html"
-      fr: "L'identificateur d'objet numérique assigné au jeu de données. Pour obtenir de plus amples renseignements, veuillez consulter le site http://cisti-icist.nrc-cnrc.gc.ca/fra/services/icist/datacite-canada/index.html"
-  validators: scheming_required string_safe
+      en: "The Digital Object Identifier assigned to the dataset. For more information visit: https://support.datacite.org/docs/doi-basics"
+      fr: "L'identificateur d'objet numérique assigné au jeu de données. Pour obtenir de plus amples renseignements, veuillez consulter le site https://support.datacite.org/docs/doi-basics"
+    validators: scheming_required string_safe digital_object_identifier
+    display_snippet: doi.html
 
 # Field = Jurisdiction.
 # Default displayed value = Federal.
diff --git a/ckanext/canada/templates/public/scheming/display_snippets/doi.html b/ckanext/canada/templates/public/scheming/display_snippets/doi.html
new file mode 100644
index 000000000..abebc0657
--- /dev/null
+++ b/ckanext/canada/templates/public/scheming/display_snippets/doi.html
@@ -0,0 +1,7 @@
+{%- set value = data[field.field_name] -%}
+
+{% if value.startswith('10') %}{# backwards compatibility for existing data #}
+  <a href="https://www.doi.org/{{ value }}">{{ value }}</a>
+{% else %}
+  {{ value }}
+{% endif %}
diff --git a/ckanext/canada/tests/test_validators.py b/ckanext/canada/tests/test_validators.py
index a10788f6b..62b2b6d96 100644
--- a/ckanext/canada/tests/test_validators.py
+++ b/ckanext/canada/tests/test_validators.py
@@ -514,6 +514,81 @@ def test_validation_options(self):
         resource = self.sysadmin_action.resource_create(**resource_data)
         assert 'validation_options' not in resource or resource['validation_options'] == None
 
+    def test_digital_object_identifier(self):
+        "DOI values should conform to the standard DOI practices."
+        pkg = self.sysadmin_action.package_create(**self.complete_pkg)
+
+        # valid DOI
+        pkg['digital_object_identifier'] = '10.1000/xyz-123'
+        up_pkg = self.sysadmin_action.package_update(**pkg)
+        assert up_pkg['digital_object_identifier'] == '10.1000/xyz-123'
+
+        # valid DOI
+        pkg['digital_object_identifier'] = '10.1016.12.31/nature.S0735-1097(98)2000/12/31/34:7-7'
+        up_pkg = self.sysadmin_action.package_update(**pkg)
+        assert up_pkg['digital_object_identifier'] == '10.1016.12.31/nature.S0735-1097(98)2000/12/31/34:7-7'
+
+        # valid DOI
+        pkg['digital_object_identifier'] = '10.1002/(SICI)1522-2594(199911)42:5<952::AID-MRM16>3.0.CO;2-S'
+        up_pkg = self.sysadmin_action.package_update(**pkg)
+        assert up_pkg['digital_object_identifier'] == '10.1002/(SICI)1522-2594(199911)42:5<952::AID-MRM16>3.0.CO;2-S'
+
+        # invalid DOI
+        pkg['digital_object_identifier'] = '7.0182/(TBS-SCT)1522-2594'
+        with pytest.raises(ValidationError) as ve:
+            self.normal_action.package_update(**pkg)
+        err = ve.value.error_dict
+        assert 'digital_object_identifier' in err
+        assert err['digital_object_identifier'] == ['Invalid value for a digital object identifier.']
+
+        # invalid DOI
+        pkg['digital_object_identifier'] = '10.01.02/(TBS-SCT)1522-2594'
+        with pytest.raises(ValidationError) as ve:
+            self.normal_action.package_update(**pkg)
+        err = ve.value.error_dict
+        assert 'digital_object_identifier' in err
+        assert err['digital_object_identifier'] == ['Invalid value for a digital object identifier.']
+
+        # invalid DOI
+        pkg['digital_object_identifier'] = '10.1016/(TBS-SCT)152???2-2594'
+        with pytest.raises(ValidationError) as ve:
+            self.normal_action.package_update(**pkg)
+        err = ve.value.error_dict
+        assert 'digital_object_identifier' in err
+        assert err['digital_object_identifier'] == ['Invalid value for a digital object identifier.']
+
+        # invalid DOI
+        pkg['digital_object_identifier'] = '10.1016/(TBS-SCT)152&&&2-2594'
+        with pytest.raises(ValidationError) as ve:
+            self.normal_action.package_update(**pkg)
+        err = ve.value.error_dict
+        assert 'digital_object_identifier' in err
+        assert err['digital_object_identifier'] == ['Invalid value for a digital object identifier.']
+
+        # invalid DOI
+        pkg['digital_object_identifier'] = '10.1016/(TBS-SCT)152"""2-2594'
+        with pytest.raises(ValidationError) as ve:
+            self.normal_action.package_update(**pkg)
+        err = ve.value.error_dict
+        assert 'digital_object_identifier' in err
+        assert err['digital_object_identifier'] == ['Invalid value for a digital object identifier.']
+
+        # invalid DOI
+        pkg['digital_object_identifier'] = "10.1016/(TBS-SCT)152'''2-2594"
+        with pytest.raises(ValidationError) as ve:
+            self.normal_action.package_update(**pkg)
+        err = ve.value.error_dict
+        assert 'digital_object_identifier' in err
+        assert err['digital_object_identifier'] == ['Invalid value for a digital object identifier.']
+
+        # invalid DOI
+        pkg['digital_object_identifier'] = "This is extremely not a DOI number"
+        with pytest.raises(ValidationError) as ve:
+            self.normal_action.package_update(**pkg)
+        err = ve.value.error_dict
+        assert 'digital_object_identifier' in err
+        assert err['digital_object_identifier'] == ['Invalid value for a digital object identifier.']
+
 
 class TestSysadminUpdate(CanadaTestBase):
     @classmethod
diff --git a/ckanext/canada/validators.py b/ckanext/canada/validators.py
index e15e37234..71f176268 100644
--- a/ckanext/canada/validators.py
+++ b/ckanext/canada/validators.py
@@ -31,6 +31,39 @@
 MIN_TAG_LENGTH = 2
 MAX_TAG_LENGTH = 140  # because twitter
 
+# DOI Validation
+#
+# See: https://www.doi.org/the-identifier/resources/handbook/
+# As of 2012, assigned registrant codes can be 3 or 4 digits long.
+# NOTE: this does not support ShortDOI (https://shortdoi.org/)
+#
+# <prefix>/<suffix>
+#
+# prefix: refers to the DOI namespace (a namespace is allocated to a given service provider).
+#         The prefix can contain only numeric values and the "." character which is used to
+#         delimit a hierarchical level in the namespace allocation: a one-delimiter prefix
+#         (for example, "10.1000") derives from a zero-delimiter prefix ("10").
+#         The prefix 10 is allocated to the DOI Foundation.
+#
+# suffix: is a unique local name in the namespace. Any Unicode 2.0 character can be used
+#         in the suffix (there is no practical limitation on the length of a DOI name).
+#         This unique string may be an existing identifier, or any unique string chosen
+#         by the Registration Agency or the referent owner (registrant). Some limitations
+#         should be applied due to DOI HTTPS Links.
+#
+# https limitations: double quotes (")
+#                    single quotes (')
+#                    &
+#                    ?
+#
+# Examples: 10.1000/xyz-123
+#           10.1109/5.771073
+#           10.231/JIM.0b013e31820bab4c
+#           10.1016.12.31/nature.S0735-1097(98)2000/12/31/34:7-7
+#           10.1002/(SICI)1522-2594(199911)42:5<952::AID-MRM16>3.0.CO;2-S
+#
+doi_match = re.compile(r'\b(10[.][0-9]{3,}(?:[.][0-9]+)*/(?:(?!["&\'\?])\S)+)$\b')
+
 
 def protect_portal_release_date(key, data, errors, context):
     """
@@ -531,3 +564,11 @@ def protect_registry_access(key, data, errors, context):
                            " from '%s' to '%s'. This field is read-only." %
                            (original, value)))
         raise StopOnError
+
+
+def digital_object_identifier(value, context):
+    if not value or value is missing:
+        return value
+    if not re.match(doi_match, value):
+        raise Invalid(_('Invalid value for a digital object identifier.'))
+    return value