diff --git a/lib/cocina/models/descriptive_basic_value.rb b/lib/cocina/models/descriptive_basic_value.rb
index cb430af1..9209dc15 100644
--- a/lib/cocina/models/descriptive_basic_value.rb
+++ b/lib/cocina/models/descriptive_basic_value.rb
@@ -17,6 +17,7 @@ class DescriptiveBasicValue < Struct
       attribute :uri, Types::Strict::String.meta(omittable: true)
       attribute :standard, Standard.optional.meta(omittable: true)
       attribute :encoding, Standard.optional.meta(omittable: true)
+      attribute :identifier, Types::Strict::Array.of(DescriptiveValue).meta(omittable: true)
       attribute :source, Source.optional.meta(omittable: true)
       # The preferred display label to use for the descriptive element in access systems.
       attribute :displayLabel, Types::Strict::String.meta(omittable: true)
diff --git a/lib/cocina/models/descriptive_value.rb b/lib/cocina/models/descriptive_value.rb
index 2decfe23..00b1dfa1 100644
--- a/lib/cocina/models/descriptive_value.rb
+++ b/lib/cocina/models/descriptive_value.rb
@@ -17,6 +17,7 @@ class DescriptiveValue < Struct
       attribute :uri, Types::Strict::String.meta(omittable: true)
       attribute :standard, Standard.optional.meta(omittable: true)
       attribute :encoding, Standard.optional.meta(omittable: true)
+      attribute :identifier, Types::Strict::Array.of(DescriptiveValue).meta(omittable: true)
       attribute :source, Source.optional.meta(omittable: true)
       # The preferred display label to use for the descriptive element in access systems.
       attribute :displayLabel, Types::Strict::String.meta(omittable: true)
diff --git a/lib/cocina/models/descriptive_value_language.rb b/lib/cocina/models/descriptive_value_language.rb
index f42ac6f5..5a93fafa 100644
--- a/lib/cocina/models/descriptive_value_language.rb
+++ b/lib/cocina/models/descriptive_value_language.rb
@@ -10,9 +10,9 @@ class DescriptiveValueLanguage < Struct
       # String describing the standard or encoding.
       attribute :value, Types::Strict::String.meta(omittable: true)
       attribute :note, Types::Strict::Array.of(DescriptiveValue).meta(omittable: true)
-      attribute :source, Source.optional.meta(omittable: true)
-      # The version of the standard or encoding.
+      # The version of the value standard.
       attribute :version, Types::Strict::String.meta(omittable: true)
+      attribute :source, Source.optional.meta(omittable: true)
       attribute :valueScript, Standard.optional.meta(omittable: true)
     end
   end
diff --git a/lib/cocina/models/event.rb b/lib/cocina/models/event.rb
index 5f7d8ad0..2b45ca16 100644
--- a/lib/cocina/models/event.rb
+++ b/lib/cocina/models/event.rb
@@ -6,9 +6,12 @@ class Event < Struct
       attribute :structuredValue, Types::Strict::Array.of(DescriptiveValue).meta(omittable: true)
       # Description of the event (creation, publication, etc.).
       attribute :type, Types::Strict::String.meta(omittable: true)
+      # The preferred display label to use for the event in access systems.
+      attribute :displayLabel, Types::Strict::String.meta(omittable: true)
       attribute :date, Types::Strict::Array.of(DescriptiveValue).meta(omittable: true)
       attribute :contributor, Types::Strict::Array.of(Contributor).meta(omittable: true)
       attribute :location, Types::Strict::Array.of(DescriptiveValue).meta(omittable: true)
+      attribute :identifier, Types::Strict::Array.of(DescriptiveValue).meta(omittable: true)
       attribute :note, Types::Strict::Array.of(DescriptiveValue).meta(omittable: true)
     end
   end
diff --git a/lib/cocina/models/language.rb b/lib/cocina/models/language.rb
index 1a94427c..0cb3c06d 100644
--- a/lib/cocina/models/language.rb
+++ b/lib/cocina/models/language.rb
@@ -17,6 +17,7 @@ class Language < Struct
       attribute :uri, Types::Strict::String.meta(omittable: true)
       attribute :standard, Standard.optional.meta(omittable: true)
       attribute :encoding, Standard.optional.meta(omittable: true)
+      attribute :identifier, Types::Strict::Array.of(DescriptiveValue).meta(omittable: true)
       attribute :source, Source.optional.meta(omittable: true)
       # The preferred display label to use for the descriptive element in access systems.
       attribute :displayLabel, Types::Strict::String.meta(omittable: true)
diff --git a/lib/cocina/models/related_resource.rb b/lib/cocina/models/related_resource.rb
index b4e50510..c2654749 100644
--- a/lib/cocina/models/related_resource.rb
+++ b/lib/cocina/models/related_resource.rb
@@ -5,6 +5,10 @@ module Models
     class RelatedResource < Struct
       # The relationship of the related resource to the described resource.
       attribute :type, Types::Strict::String.meta(omittable: true)
+      # Status of the related resource relative to other related resources.
+      attribute :status, Types::Strict::String.meta(omittable: true)
+      # The preferred display label to use for the related resource in access systems.
+      attribute :displayLabel, Types::Strict::String.meta(omittable: true)
       attribute :title, Types::Strict::Array.of(DescriptiveValue).meta(omittable: true)
       attribute :contributor, Types::Strict::Array.of(Contributor).meta(omittable: true)
       attribute :event, Types::Strict::Array.of(Event).meta(omittable: true)
@@ -12,10 +16,13 @@ class RelatedResource < Struct
       attribute :language, Types::Strict::Array.of(Language).meta(omittable: true)
       attribute :note, Types::Strict::Array.of(DescriptiveValue).meta(omittable: true)
       attribute :identifier, Types::Strict::Array.of(DescriptiveValue).meta(omittable: true)
+      attribute :standard, Standard.optional.meta(omittable: true)
       attribute :subject, Types::Strict::Array.of(DescriptiveValue).meta(omittable: true)
       # Stanford persistent URL associated with the related resource.
       attribute :purl, Types::Strict::String.meta(omittable: true)
       attribute :access, DescriptiveAccessMetadata.optional.meta(omittable: true)
+      # The version of the related resource.
+      attribute :version, Types::Strict::String.meta(omittable: true)
     end
   end
 end
diff --git a/lib/cocina/models/standard.rb b/lib/cocina/models/standard.rb
index 4acb1661..739b545a 100644
--- a/lib/cocina/models/standard.rb
+++ b/lib/cocina/models/standard.rb
@@ -10,9 +10,9 @@ class Standard < Struct
       # String describing the standard or encoding.
       attribute :value, Types::Strict::String.meta(omittable: true)
       attribute :note, Types::Strict::Array.of(DescriptiveValue).meta(omittable: true)
-      attribute :source, Source.optional.meta(omittable: true)
-      # The version of the standard or encoding.
+      # The version of the value standard.
       attribute :version, Types::Strict::String.meta(omittable: true)
+      attribute :source, Source.optional.meta(omittable: true)
     end
   end
 end
diff --git a/lib/cocina/models/title.rb b/lib/cocina/models/title.rb
index 00270e65..d48b963b 100644
--- a/lib/cocina/models/title.rb
+++ b/lib/cocina/models/title.rb
@@ -17,6 +17,7 @@ class Title < Struct
       attribute :uri, Types::Strict::String.meta(omittable: true)
       attribute :standard, Standard.optional.meta(omittable: true)
       attribute :encoding, Standard.optional.meta(omittable: true)
+      attribute :identifier, Types::Strict::Array.of(DescriptiveValue).meta(omittable: true)
       attribute :source, Source.optional.meta(omittable: true)
       # The preferred display label to use for the descriptive element in access systems.
       attribute :displayLabel, Types::Strict::String.meta(omittable: true)
diff --git a/openapi.yml b/openapi.yml
index 93677194..0bd17446 100644
--- a/openapi.yml
+++ b/openapi.yml
@@ -261,6 +261,7 @@ components:
           description: Status of the contributor relative to other parallel contributors
             (e.g. the primary author among a group of contributors).
           type: string
+          # type: integer
         role:
           description: Relationships of the contributor to the resource or to an event
             in its history.
@@ -300,7 +301,7 @@ components:
             $ref: "#/components/schemas/Event"
         form:
           description: Characteristics of the resource's physical, digital, and intellectual
-            form and genre.
+            form and genre, and of its process of creation.
           type: array
           items:
             $ref: "#/components/schemas/DescriptiveValue"
@@ -435,6 +436,7 @@ components:
               description: Status of the descriptive element value relative to other instances
                 of the element.
               type: string
+              # type: integer (uncomment when issue #154 is resolved)
             code:
               description: Code value of the descriptive element.
               type: string
@@ -448,6 +450,11 @@ components:
             encoding:
               # description: Encoding schema, standard, or syntax to which the value conforms.
               $ref: "#/components/schemas/Standard"
+            identifier:
+              description: Identifiers and URIs associated with the descriptive element.
+              type: array
+              items:
+                  $ref: "#/components/schemas/DescriptiveValue"
             source:
               $ref: "#/components/schemas/Source"
             displayLabel:
@@ -685,6 +692,9 @@ components:
             type:
               description: Description of the event (creation, publication, etc.).
               type: string
+            displayLabel:
+              description: The preferred display label to use for the event in access systems.
+              type: string
             date:
               description: Dates associated with the event.
               type: array
@@ -700,6 +710,11 @@ components:
               type: array
               items:
                 $ref: "#/components/schemas/DescriptiveValue"
+            identifier:
+              description: Identifiers and URIs associated with the event.
+              type: array
+              items:
+                $ref: "#/components/schemas/DescriptiveValue"
             note:
               description: Other information about the event.
               type: array
@@ -912,6 +927,13 @@ components:
         type:
           description: The relationship of the related resource to the described resource.
           type: string
+        status:
+          description: Status of the related resource relative to other related resources.
+          type: string
+          # type: integer
+        displayLabel:
+          description: The preferred display label to use for the related resource in access systems.
+          type: string
         title:
           description: Titles of the related resource.
           type: array
@@ -930,7 +952,7 @@ components:
             $ref: "#/components/schemas/Event"
         form:
           description: Characteristics of the related resource's physical, digital, and intellectual
-            form and genre.
+            form and genre, and of its process of creation.
           type: array
           items:
             $ref: "#/components/schemas/DescriptiveValue"
@@ -950,6 +972,9 @@ components:
           type: array
           items:
             $ref: "#/components/schemas/DescriptiveValue"
+        standard:
+          # description: Descriptive or content standards to which the value conforms.
+          $ref: "#/components/schemas/Standard"
         subject:
           description: Terms associated with the intellectual content of the related resource.
           type: array
@@ -961,6 +986,9 @@ components:
           format: uri
         access:
           $ref: "#/components/schemas/DescriptiveAccessMetadata"
+        version:
+          description: The version of the related resource.
+          type: string
     ReleaseTag:
       description: A tag that indicates the item or collection should be released.
       type: object
@@ -1244,7 +1272,7 @@ components:
       example: 'sul:PC0170_s3_Fiesta_Bowl_2012-01-02_210609_2026'
     Standard:
       description: Property model for indicating the encoding, standard, or syntax
-        to which a value conforms.
+        to which a value conforms (e.g. RDA).
       type: object
       additionalProperties: false
       properties:
@@ -1263,8 +1291,8 @@ components:
           type: array
           items:
             $ref: "#/components/schemas/DescriptiveValue"
-        source:
-          $ref: "#/components/schemas/Source"
         version:
           description: The version of the standard or encoding.
           type: string
+        source:
+          $ref: "#/components/schemas/Source"