Add new slots and update existing ones for heritage ontology

- Introduced new slots for administrative context, CMS categories, detected CMS, product version, co-funding requirements, co-organizers, collection access, collection dates, characteristics, class definitions, Dutch context, example locations, names, notes, and Wikidata IDs. - Enhanced existing slots such as has_or_had_organizer and offers_or_offered_access to align with RiC-O naming conventions and improve temporal semantics. - Migrated and restructured descriptions for clarity and consistency across various slots, ensuring alignment with Schema.org and other ontological standards. - Implemented multivalued and inlined options for several slots to accommodate complex data structures. - Updated annotations and examples to reflect the latest usage scenarios and best practices in the heritage sector.
2026-01-19 16:05:32 +01:00 · 2026-01-19 16:05:32 +01:00 · f622450304
commit f622450304
parent d0e5a5092d
55 changed files with 2677 additions and 145 deletions
--- a/frontend/public/schemas/20251121/linkml/manifest.json
+++ b/frontend/public/schemas/20251121/linkml/manifest.json
@ -1,5 +1,5 @@
 {
-  "generated": "2026-01-19T13:49:48.064Z",
+  "generated": "2026-01-19T14:55:27.224Z",
  "schemaRoot": "/schemas/20251121/linkml",
  "totalFiles": 2969,
  "categoryCounts": {
--- a/schemas/20251121/linkml/manifest.json
+++ b/schemas/20251121/linkml/manifest.json
@ -1,5 +1,5 @@
 {
-  "generated": "2026-01-19T14:55:27.224Z",
+  "generated": "2026-01-19T15:05:33.164Z",
  "schemaRoot": "/schemas/20251121/linkml",
  "totalFiles": 2969,
  "categoryCounts": {
--- a/schemas/20251121/linkml/modules/classes/Access.yaml
+++ b/schemas/20251121/linkml/modules/classes/Access.yaml
@ -0,0 +1,254 @@
+# Access class
+# Structured access information for heritage collections and services
+#
+# Created per slot_fixes.yaml revision for collection_access migration
+# Generation date: 2026-01-19
+# Rule compliance: 53 (slot_fixes.yaml), 39 (RiC-O naming)
+
+id: https://nde.nl/ontology/hc/class/Access
+name: Access
+title: Access Class
+
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+  schema: http://schema.org/
+  dcterms: http://purl.org/dc/terms/
+  crm: http://www.cidoc-crm.org/cidoc-crm/
+
+default_prefix: hc
+
+imports:
+  - linkml:types
+  - ../metadata
+  - ./TimeSpan
+
+classes:
+  Access:
+    class_uri: dcterms:RightsStatement
+    description: |
+      Structured access information for heritage collections, services, or facilities.
+      
+      **Purpose**:
+      Replaces simple string descriptions of access conditions with structured
+      data capturing access types, eligible users, conditions, and restrictions.
+      
+      **Key Properties**:
+      - `access_type`: Type of access (PUBLIC, BY_APPOINTMENT, RESTRICTED, etc.)
+      - `eligible_users`: Who can access (public, students, faculty, researchers)
+      - `access_conditions`: Conditions or requirements for access
+      - `access_restrictions`: Specific restrictions that apply
+      - `temporal_extent`: When this access policy applies
+      
+      **Access Types**:
+      - PUBLIC: Open to general public
+      - BY_APPOINTMENT: Requires advance appointment
+      - ACADEMIC: Restricted to academic community
+      - RESEARCHER: Restricted to credentialed researchers
+      - MEMBER: Requires membership
+      - RESTRICTED: Limited access with specific conditions
+      - CLOSED: Not currently accessible
+      - DIGITAL_ONLY: Available only in digital form
+      
+      **Ontological Alignment**:
+      - **Primary**: `dcterms:RightsStatement` - Dublin Core rights statement
+      - **Close**: `schema:publicAccess` - Schema.org access indicator
+      - **Related**: `crm:E30_Right` - CIDOC-CRM rights
+      
+    exact_mappings:
+      - dcterms:RightsStatement
+    
+    close_mappings:
+      - schema:publicAccess
+    
+    related_mappings:
+      - crm:E30_Right
+    
+    slots:
+      - access_type
+      - eligible_users
+      - access_conditions
+      - access_restrictions
+      - access_description
+      - temporal_extent
+      - is_digital_access
+    
+    slot_usage:
+      access_type:
+        required: true
+        range: AccessTypeEnum
+        description: Type of access offered
+        examples:
+          - value: PUBLIC
+          - value: BY_APPOINTMENT
+          - value: ACADEMIC
+      
+      eligible_users:
+        required: false
+        range: string
+        multivalued: true
+        description: |
+          Categories of users eligible for this access.
+          Examples: "enrolled students", "faculty", "visiting scholars",
+          "credentialed researchers", "general public"
+        examples:
+          - value: "enrolled students"
+          - value: "faculty and staff"
+          - value: "visiting researchers with credentials"
+      
+      access_conditions:
+        required: false
+        range: string
+        multivalued: true
+        description: |
+          Conditions that must be met for access.
+          Examples: "valid university ID", "advance booking required",
+          "handling training completed"
+        examples:
+          - value: "valid university ID required"
+          - value: "24-hour advance booking required"
+      
+      access_restrictions:
+        required: false
+        range: string
+        multivalued: true
+        description: |
+          Specific restrictions on access.
+          Examples: "conservation concerns limit handling",
+          "donor restrictions apply", "high-value items in secure storage"
+        examples:
+          - value: "fragile materials limited to supervised viewing"
+          - value: "donor bequest restricts reproduction"
+      
+      access_description:
+        required: false
+        range: string
+        description: |
+          Free-text description of access policy.
+          For backward compatibility with string-based collection_access.
+        examples:
+          - value: "Open to enrolled students and faculty; public by appointment"
+      
+      temporal_extent:
+        required: false
+        range: TimeSpan
+        inlined: true
+        description: |
+          Time period during which this access policy applies.
+          Useful for temporary restrictions or seasonal access.
+      
+      is_digital_access:
+        required: false
+        range: boolean
+        description: Whether this access is for digital materials
+    
+    annotations:
+      specificity_score: 0.50
+      specificity_rationale: "Moderately specific - applies to collection and service access contexts"
+      custodian_types: '["*"]'
+      custodian_types_rationale: "All institution types offer some form of access"
+    
+    comments:
+      - "Created per slot_fixes.yaml revision for collection_access migration"
+      - "Replaces string-based collection_access with structured access data"
+      - "RULE 53: Part of collection_access → offers_or_offered_access + Access migration"
+    
+    examples:
+      - value:
+          access_type: PUBLIC
+          access_description: "Open to general public during gallery hours"
+          eligible_users:
+            - "general public"
+          access_conditions:
+            - "during posted gallery hours"
+        description: "Public access during gallery hours"
+      
+      - value:
+          access_type: BY_APPOINTMENT
+          eligible_users:
+            - "credentialed researchers"
+            - "graduate students with faculty sponsor"
+          access_conditions:
+            - "48-hour advance booking required"
+            - "handling training required for original materials"
+          access_restrictions:
+            - "fragile materials limited to supervised viewing only"
+        description: "Research access by appointment with conditions"
+      
+      - value:
+          access_type: ACADEMIC
+          access_description: "Open to enrolled students and faculty; public by appointment"
+          eligible_users:
+            - "enrolled students"
+            - "faculty"
+            - "research staff"
+          access_conditions:
+            - "valid university ID"
+          is_digital_access: false
+        description: "Academic community access with public by appointment"
+      
+      - value:
+          access_type: DIGITAL_ONLY
+          access_description: "Collection accessible only through online database"
+          eligible_users:
+            - "anyone with internet access"
+          is_digital_access: true
+        description: "Digital-only access"
+
+slots:
+  access_type:
+    slot_uri: dcterms:accessRights
+    description: Type of access offered
+    range: string
+    required: true
+  
+  eligible_users:
+    slot_uri: schema:eligibleRegion
+    description: Categories of users eligible for access
+    range: string
+    multivalued: true
+  
+  access_conditions:
+    slot_uri: schema:termsOfService
+    description: Conditions for access
+    range: string
+    multivalued: true
+  
+  access_restrictions:
+    slot_uri: schema:usageInfo
+    description: Restrictions on access
+    range: string
+    multivalued: true
+  
+  access_description:
+    slot_uri: schema:description
+    description: Free-text description of access policy
+    range: string
+  
+  is_digital_access:
+    slot_uri: schema:isAccessibleForFree
+    description: Whether this is digital access
+    range: boolean
+
+enums:
+  AccessTypeEnum:
+    description: Types of access to collections or services
+    permissible_values:
+      PUBLIC:
+        description: Open to general public
+      BY_APPOINTMENT:
+        description: Requires advance appointment
+      ACADEMIC:
+        description: Restricted to academic community
+      RESEARCHER:
+        description: Restricted to credentialed researchers
+      MEMBER:
+        description: Requires membership
+      RESTRICTED:
+        description: Limited access with specific conditions
+      CLOSED:
+        description: Not currently accessible
+      DIGITAL_ONLY:
+        description: Available only in digital form
+      MIXED:
+        description: Multiple access types apply
--- a/schemas/20251121/linkml/modules/classes/Acquisition.yaml
+++ b/schemas/20251121/linkml/modules/classes/Acquisition.yaml
@ -0,0 +1,168 @@
+id: https://nde.nl/ontology/hc/class/Acquisition
+name: acquisition_class
+title: Acquisition Class
+# Created per slot_fixes.yaml revision for collection_date migration
+# RULE 53: Structured acquisition event with temporal extent
+# CIDOC-CRM E8 Acquisition pattern
+
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+  crm: http://www.cidoc-crm.org/cidoc-crm/
+  prov: http://www.w3.org/ns/prov#
+  schema: http://schema.org/
+  dwc: http://rs.tdwg.org/dwc/terms/
+  rico: https://www.ica.org/standards/RiC/ontology#
+
+imports:
+  - linkml:types
+  - ../slots/temporal_extent
+  - ./TimeSpan
+  - ../slots/specificity_annotation
+  - ../slots/has_or_had_score
+  - ./SpecificityAnnotation
+  - ./TemplateSpecificityScore
+  - ./TemplateSpecificityType
+  - ./TemplateSpecificityTypes
+
+default_range: string
+
+enums:
+  AcquisitionMethodEnum:
+    description: Methods by which items are acquired for collections.
+    permissible_values:
+      FIELD_COLLECTION:
+        description: Collected in the field (biological, geological specimens)
+        meaning: dwc:Occurrence
+      PURCHASE:
+        description: Acquired through purchase
+        meaning: schema:BuyAction
+      DONATION:
+        description: Given as a gift or donation
+        meaning: schema:DonateAction
+      BEQUEST:
+        description: Received through will or estate
+      TRANSFER:
+        description: Transferred from another institution
+        meaning: crm:E10_Transfer_of_Custody
+      EXCHANGE:
+        description: Exchanged with another institution (specimen exchange)
+      EXCAVATION:
+        description: Recovered through archaeological excavation
+      LOAN:
+        description: On long-term loan (not owned)
+      CONFISCATION:
+        description: Seized or confiscated (legal action)
+      FOUND:
+        description: Found object (no prior owner)
+      COMMISSION:
+        description: Commissioned work (created for the collection)
+      UNKNOWN:
+        description: Acquisition method unknown
+
+classes:
+  Acquisition:
+    class_uri: crm:E8_Acquisition
+    description: >-
+      Represents an acquisition event - how and when an object or specimen was obtained for a collection.
+      
+      CIDOC-CRM E8 Acquisition models the transfer of legal ownership rights.
+      
+      **Key properties**:
+      - `temporal_extent`: When the acquisition occurred (TimeSpan with fuzzy boundaries for historical items)
+      - `acquisition_method`: How the item was acquired (field collection, purchase, donation, etc.)
+      - `acquisition_source`: From whom/where acquired (collector, dealer, previous owner, field location)
+      - `acquisition_agent`: Who performed the acquisition (collector, curator, institution)
+      
+      **Darwin Core alignment**: For biological specimens:
+      - `temporal_extent` replaces `dwc:eventDate` (collection date)
+      - `acquisition_source` can capture `dwc:locality` and `dwc:recordedBy`
+      
+      **Use cases**:
+      - Museum object provenance (purchase from dealer, 1923)
+      - Biological specimen collection (field collection, Amazon basin, 1750s)
+      - Archival transfer (transferred from ministry archives, 2001)
+      - Art donation (donated by artist's estate, 2015)
+    exact_mappings:
+      - crm:E8_Acquisition
+    close_mappings:
+      - prov:Activity
+      - schema:AcquireAction
+    related_mappings:
+      - rico:Event
+      - dwc:Event
+    slots:
+      - temporal_extent
+      - specificity_annotation
+      - has_or_had_score
+    attributes:
+      acquisition_method:
+        range: AcquisitionMethodEnum
+        description: >-
+          Method by which the item was acquired (field collection, purchase, donation, etc.).
+      acquisition_source:
+        range: string
+        description: >-
+          Source from which item was acquired. Can be:
+          - Person name (collector, donor, seller)
+          - Institution name (transferring institution)
+          - Location (field collection locality)
+          - Dealer or auction house
+      acquisition_agent:
+        range: string
+        description: >-
+          Agent who performed the acquisition (collector name, curator, institution).
+          For biological specimens, maps to dwc:recordedBy.
+      acquisition_location:
+        range: string
+        description: >-
+          Location where acquisition occurred (field collection site, auction house location).
+          For biological specimens, can capture field locality.
+      acquisition_reference:
+        range: string
+        description: >-
+          Reference number or identifier for the acquisition (accession number, lot number).
+      acquisition_notes:
+        range: string
+        description: >-
+          Additional notes about the acquisition event.
+      acquisition_date_text:
+        range: string
+        description: >-
+          Original date text as recorded (e.g., "1750s", "pre-1662", "circa 1900").
+          For backward compatibility with string-based collection_date.
+          The structured date should be in temporal_extent.
+    comments:
+      - "Created per slot_fixes.yaml revision for collection_date migration"
+      - "Replaces simple collection_date string with structured acquisition event"
+      - "RULE 53: Part of collection_date → was_acquired_through + Acquisition migration"
+    annotations:
+      specificity_score: 0.70
+      specificity_rationale: "Fairly specific - applies to items with acquisition provenance"
+    examples:
+      - value: |
+          # Biological specimen collected in the field
+          acquisition_method: FIELD_COLLECTION
+          temporal_extent:
+            begin_of_the_begin: "1750-01-01"
+            end_of_the_end: "1759-12-31"
+            notes: "Collected sometime in the 1750s"
+          acquisition_source: "Amazon basin, Brazil"
+          acquisition_agent: "Unknown Dutch collector"
+          acquisition_date_text: "1750s"
+      - value: |
+          # Museum object purchased from dealer
+          acquisition_method: PURCHASE
+          temporal_extent:
+            begin_of_the_begin: "1923-03-15"
+            end_of_the_end: "1923-03-15"
+          acquisition_source: "Sotheby's London"
+          acquisition_reference: "Lot 245, Sale of March 1923"
+      - value: |
+          # Historical specimen with uncertain date
+          acquisition_method: FIELD_COLLECTION
+          temporal_extent:
+            begin_of_the_begin: "1600-01-01"
+            end_of_the_end: "1662-12-31"
+            notes: "Pre-1662 (before Great Fire of London)"
+          acquisition_date_text: "pre-1662"
--- a/schemas/20251121/linkml/modules/classes/AuxiliaryDigitalPlatform.yaml
+++ b/schemas/20251121/linkml/modules/classes/AuxiliaryDigitalPlatform.yaml
@ -30,7 +30,10 @@ imports:
  - ../slots/has_or_had_archival_status
  - ../slots/has_or_had_identifier
  - ../slots/has_auxiliary_platform_type
-  - ../slots/cms_detected
+  # REMOVED 2026-01-19: ../slots/cms_detected - migrated to is_or_was_based_on + CMS (Rule 53)
+  - ../slots/is_or_was_based_on  # was: cms_detected - migrated per Rule 53 (2026-01-19)
+  - ./CMS
+  - ./CMSType
  - ../slots/fixity_info
  - ../slots/iiif_support
  - ../slots/is_auxiliary_of_platform
@ -122,7 +125,7 @@ classes:
    - is_or_was_archived_at  # MIGRATED: was archived_at (2026-01-15)
    - has_or_had_identifier
    - has_auxiliary_platform_type
-    - cms_detected
+    - is_or_was_based_on  # was: cms_detected - migrated per Rule 53 (2026-01-19)
    - has_or_had_data_service_endpoint
    - fixity_info
    - funding_source
@ -299,14 +302,36 @@ classes:
        examples:
        - value: sha256:e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
          description: SHA-256 checksum of archived content
-      cms_detected:
-        range: boolean
+      # DEPRECATED 2026-01-19: cms_detected - migrated to is_or_was_based_on + CMS
+      # Old: cms_detected: true/false (boolean flag)
+      # New: is_or_was_based_on: CMS instance with name, version, detection method
+      is_or_was_based_on:  # was: cms_detected - migrated per Rule 53 (2026-01-19)
+        description: |
+          CMS detected on this platform (replaces boolean cms_detected).
+          MIGRATED from boolean flag to structured CMS reference.
+          If present, a CMS was detected; if absent, no CMS detected.
+          
+          **Migration**:
+          - Old: cms_detected: true
+          - New: is_or_was_based_on: {cms_name: WordPress, cms_version: "6.4"}
+        range: CMS
+        multivalued: true
+        inlined_as_list: true
        required: false
        examples:
-        - value: true
-          description: CMS backend detected
-        - value: false
-          description: No CMS detected (static site)
+        - value:
+            cms_name: WordPress
+            cms_version: "6.4.2"
+            has_or_had_type: CustomCMS
+            detected_at: "2026-01-19T12:00:00Z"
+            detection_method: HTTP_HEADER
+          description: CMS detected via HTTP header
+        - value:
+            cms_name: Omeka S
+            cms_version: "4.0.1"
+            has_or_had_type: MuseumCMS
+            detection_method: URL_PATTERN
+          description: Omeka S detected via URL pattern
      has_or_had_powered_by_cm:
        range: CollectionManagementSystem
        multivalued: true
--- a/schemas/20251121/linkml/modules/classes/BiologicalObject.yaml
+++ b/schemas/20251121/linkml/modules/classes/BiologicalObject.yaml
@ -28,7 +28,9 @@ imports:
  # cites_appendix REMOVED - migrated to is_or_was_listed_in with CITESAppendix class (Rule 53, 2026-01-19)
  - ../slots/is_or_was_listed_in
  - ./CITESAppendix
-  - ../slots/collection_date
+  # REMOVED 2026-01-19: collection_date - migrated to was_acquired_through + Acquisition (Rule 53)
+  - ../slots/was_acquired_through
+  - ./Acquisition
  - ../slots/collection_locality_text
  - ../slots/collection_location
  - ../slots/collector
@ -122,7 +124,8 @@ classes:
    - has_or_had_identifier
    # cites_appendix REMOVED - migrated to is_or_was_listed_in with CITESAppendix (Rule 53, 2026-01-19)
    - is_or_was_listed_in
-    - collection_date
+    # collection_date REMOVED - migrated to was_acquired_through + Acquisition (Rule 53, 2026-01-19)
+    - was_acquired_through
    - collection_locality_text
    - collection_location
    - collector
@ -374,15 +377,36 @@ classes:
        examples:
        - value: Natural History Museum Preparation Lab
        - value: J. van der Berg
-      collection_date:
+      # MIGRATED 2026-01-19: collection_date → was_acquired_through + Acquisition (Rule 53)
+      was_acquired_through:
        required: false
-        range: string
+        range: Acquisition
+        inlined: true
+        inlined_as_list: true
+        description: >-
+          Acquisition event capturing when and how specimen was collected.
+          Replaces simple collection_date with structured acquisition data.
        examples:
-        - value: '2020-06-15'
-        - value: 2020-06/2020-07
-          description: Collected sometime in June-July 2020
-        - value: 1870s
-          description: Historical specimen with approximate date
+        - value: |
+            acquisition_method: FIELD_COLLECTION
+            temporal_extent:
+              begin_of_the_begin: "2020-06-15"
+              end_of_the_end: "2020-06-15"
+            acquisition_date_text: "2020-06-15"
+        - value: |
+            acquisition_method: FIELD_COLLECTION
+            temporal_extent:
+              begin_of_the_begin: "2020-06-01"
+              end_of_the_end: "2020-07-31"
+            acquisition_date_text: "2020-06/2020-07"
+            acquisition_notes: "Collected sometime in June-July 2020"
+        - value: |
+            acquisition_method: FIELD_COLLECTION
+            temporal_extent:
+              begin_of_the_begin: "1870-01-01"
+              end_of_the_end: "1879-12-31"
+            acquisition_date_text: "1870s"
+            acquisition_notes: "Historical specimen with approximate date"
      collection_location:
        required: false
        range: CustodianPlace
@ -514,7 +538,14 @@ classes:
        - HEAD
        - FOOT
        preservation_method: DRIED_WHOLE
-        collection_date: pre-1662
+        # MIGRATED 2026-01-19: collection_date → was_acquired_through (Rule 53)
+        was_acquired_through:
+        - acquisition_method: FIELD_COLLECTION
+          acquisition_date_text: "pre-1662"
+          temporal_extent:
+            begin_of_the_begin: "1600-01-01"
+            end_of_the_end: "1662-12-31"
+            notes: "Pre-1662 (before Great Fire of London destroyed records)"
        collection_location:
          place_name: Mauritius
          country: MU
@ -578,7 +609,14 @@ classes:
        - LEAF
        - FLOWER
        preservation_method: DRIED_PRESSED
-        collection_date: 1750s
+        # MIGRATED 2026-01-19: collection_date → was_acquired_through (Rule 53)
+        was_acquired_through:
+        - acquisition_method: FIELD_COLLECTION
+          acquisition_date_text: "1750s"
+          temporal_extent:
+            begin_of_the_begin: "1750-01-01"
+            end_of_the_end: "1759-12-31"
+            notes: "Collected by Linnaeus in the 1750s"
        collector:
        - Carl Linnaeus
        current_keeper: https://nde.nl/ontology/hc/custodian/uk/royal-botanic-gardens-kew
--- a/schemas/20251121/linkml/modules/classes/CMS.yaml
+++ b/schemas/20251121/linkml/modules/classes/CMS.yaml
@ -0,0 +1,142 @@
+id: https://nde.nl/ontology/hc/class/CMS
+name: cms_class
+title: CMS Class
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+  schema: http://schema.org/
+  prov: http://www.w3.org/ns/prov#
+  doap: http://usefulinc.com/ns/doap#
+imports:
+  - linkml:types
+  - ../slots/has_or_had_label
+  - ../slots/has_or_had_version
+  - ../slots/has_or_had_type
+  - ./CMSType
+default_prefix: hc
+classes:
+  CMS:
+    class_uri: schema:SoftwareApplication
+    description: |
+      A detected Content Management System (CMS) on a digital platform.
+      
+      **Purpose**: Represents a CMS instance detected through automated discovery
+      or manual identification. Used when a platform is_or_was_based_on a CMS.
+      
+      **Distinction from CollectionManagementSystem**:
+      - **CMS**: Lightweight detection record (what CMS was found)
+      - **CollectionManagementSystem**: Full institutional CMS deployment profile
+        (configuration, collections managed, custodian relationships)
+      
+      **Detection Methods** (from original cms_detected documentation):
+      - HTTP response headers (X-Powered-By, Server)
+      - HTML meta tags (generator)
+      - URL patterns (e.g., /providence/, /omeka/)
+      - JavaScript libraries or framework signatures
+      - Admin panel detection
+      
+      **Use Cases**:
+      1. "What CMS powers this auxiliary platform?" → Check is_or_was_based_on
+      2. Technical survey: Identify platforms by CMS type
+      3. Migration planning: Prioritize platforms by CMS technology
+      
+      **Example**:
+      ```yaml
+      AuxiliaryDigitalPlatform:
+        platform_name: Heritage Blog
+        is_or_was_based_on:
+          - cms_name: WordPress
+            cms_version: "6.4.2"
+            cms_type: CustomCMS
+            detected_at: "2026-01-19T12:00:00Z"
+            detection_method: HTTP_HEADER
+      ```
+      
+      **Migration Note**: Created 2026-01-19 per slot_fixes.yaml (Rule 53).
+      Supports migration from boolean cms_detected to structured CMS reference.
+    exact_mappings:
+      - schema:SoftwareApplication
+    close_mappings:
+      - doap:Project
+    slots:
+      - cms_name
+      - has_or_had_version
+      - has_or_had_type
+      - detected_at
+      - detection_method
+    slot_usage:
+      cms_name:
+        description: Name of the detected CMS (e.g., WordPress, Drupal, Omeka)
+        range: string
+        required: true
+        examples:
+          - value: WordPress
+            description: WordPress CMS
+          - value: Omeka S
+            description: Omeka S digital collections platform
+          - value: CollectiveAccess
+            description: CollectiveAccess museum CMS
+      has_or_had_version:
+        description: Detected version of the CMS
+        range: string
+        required: false
+        examples:
+          - value: "6.4.2"
+            description: WordPress version
+          - value: "4.0.1"
+            description: Omeka S version
+      has_or_had_type:
+        description: CMS type classification (maps to CMSType hierarchy)
+        range: CMSType
+        required: false
+        examples:
+          - value: MuseumCMS
+            description: Museum-focused CMS
+          - value: ArchiveCMS
+            description: Archive-focused CMS
+      detected_at:
+        description: ISO 8601 timestamp when CMS was detected
+        range: datetime
+        required: false
+        examples:
+          - value: "2026-01-19T12:00:00Z"
+            description: Detection timestamp
+      detection_method:
+        description: Method used to detect the CMS
+        range: string
+        required: false
+        examples:
+          - value: HTTP_HEADER
+            description: Detected via X-Powered-By header
+          - value: META_TAG
+            description: Detected via HTML generator meta tag
+          - value: URL_PATTERN
+            description: Detected via URL structure
+          - value: MANUAL
+            description: Manually identified
+    annotations:
+      custodian_types: '["D"]'
+      custodian_types_rationale: Digital platforms (D) are the primary users of CMS detection
+      specificity_score: 0.70
+      specificity_rationale: Specific to digital platform CMS detection context
+
+slots:
+  cms_name:
+    slot_uri: schema:name
+    description: Name of the Content Management System
+    range: string
+    exact_mappings:
+      - schema:name
+      - doap:name
+
+  detected_at:
+    slot_uri: prov:generatedAtTime
+    description: Timestamp when the CMS was detected
+    range: datetime
+    exact_mappings:
+      - prov:generatedAtTime
+
+  detection_method:
+    slot_uri: prov:wasGeneratedBy
+    description: Method used to detect the CMS (HTTP_HEADER, META_TAG, URL_PATTERN, MANUAL)
+    range: string
--- a/schemas/20251121/linkml/modules/classes/CMSType.yaml
+++ b/schemas/20251121/linkml/modules/classes/CMSType.yaml
@ -0,0 +1,120 @@
+# CMSType class
+# Abstract base class for CMS type taxonomy
+#
+# Generation date: 2026-01-19
+# Rule compliance: 0b (Type/Types pattern), 53 (slot_fixes.yaml), 39 (RiC-O naming)
+#
+# This is the SINGULAR "Type" class - abstract base for the type hierarchy
+# Concrete types are in CMSTypes.yaml (plural)
+
+id: https://nde.nl/ontology/hc/class/cms_type
+name: cms_type_class
+title: CMS Type Class
+
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+  skos: http://www.w3.org/2004/02/skos/core#
+  schema: http://schema.org/
+
+default_prefix: hc
+
+imports:
+  - linkml:types
+  - ../slots/has_or_had_label
+  - ../slots/has_or_had_description
+  - ../slots/includes_or_included
+
+classes:
+  CMSType:
+    class_uri: skos:Concept
+    abstract: true
+    description: |
+      Abstract base class for Collection Management System type taxonomy.
+      
+      **DESIGN PATTERN** (Rule 0b - Type/Types Naming):
+      
+      This file (`CMSType.yaml`) defines the **singular abstract base class**.
+      Concrete subclasses are defined in `CMSTypes.yaml` (plural).
+      
+      **TYPE HIERARCHY**:
+      
+      ```
+      CMSType (abstract base)
+          │
+          ├── MUSEUM_CMS - Museum collection management (MuseumPlus, TMS, CollectiveAccess)
+          ├── ARCHIVE_CMS - Archival description (ArchivesSpace, MAIS, Calm)
+          ├── LIBRARY_CMS - Library management (Koha, Alma, WorldShare)
+          ├── DAM - Digital asset management (ResourceSpace, DAMsimple)
+          ├── REPOSITORY - Digital repository (DSpace, Fedora, EPrints)
+          ├── MIXED - Multi-domain (Omeka S, CollectiveAccess)
+          └── CUSTOM - Institution-specific/custom-built
+      ```
+      
+      **ONTOLOGICAL ALIGNMENT**:
+      
+      - **Primary** (`class_uri`): `skos:Concept` - SKOS concept scheme
+      - **Related**: `schema:applicationCategory` - Schema.org software categorization
+      
+      **USE CASES**:
+      
+      The CMSType is used as the range for the `has_or_had_type`
+      slot in the CollectionManagementSystem class:
+      
+      ```yaml
+      CollectionManagementSystem:
+        has_or_had_identifier:
+          identifier_scheme: CMS_URI
+          identifier_value: "https://nde.nl/ontology/hc/cms/rijksmuseum-adlib"
+        has_or_had_type: MUSEUM_CMS  # ← CMSType
+      ```
+      
+    exact_mappings:
+      - skos:Concept
+    related_mappings:
+      - schema:applicationCategory
+      
+    slots:
+      - has_or_had_label
+      - has_or_had_description
+      - includes_or_included
+      
+    slot_usage:
+      has_or_had_label:
+        description: |
+          Display label for this CMS type.
+        range: string
+        required: true
+        examples:
+          - value: "MUSEUM_CMS"
+            description: Museum collection management system
+      has_or_had_description:
+        description: |
+          Description of what this CMS type covers.
+        examples:
+          - value:
+              description_text: "Collection management systems designed for museum collections, including object cataloging, provenance tracking, and exhibition management."
+              description_type: definition
+            description: Museum CMS type definition
+      includes_or_included:
+        description: |
+          Subtypes included in this CMS type (for hierarchical types).
+        range: CMSType
+        multivalued: true
+    
+    annotations:
+      type_types_pattern: |
+        This is the SINGULAR "Type" class per Rule 0b.
+        Concrete subclasses in CMSTypes.yaml (plural).
+      custodian_types: '["*"]'
+      custodian_types_rationale: CMS types apply to all heritage custodian contexts.
+      specificity_score: 0.55
+      specificity_rationale: Type taxonomy - moderately specific to software categorization.
+      replaces_slots: "cms_category (the old string-valued slot)"
+      migration_date: "2026-01-19"
+      
+    comments:
+      - "Abstract base class for CMS type hierarchy"
+      - "Follows Rule 0b Type/Types naming pattern"
+      - "Concrete types: MUSEUM_CMS, ARCHIVE_CMS, LIBRARY_CMS, DAM, REPOSITORY, MIXED, CUSTOM"
+      - "See CMSTypes.yaml for subclass definitions"
--- a/schemas/20251121/linkml/modules/classes/CMSTypes.yaml
+++ b/schemas/20251121/linkml/modules/classes/CMSTypes.yaml
@ -0,0 +1,258 @@
+# CMSTypes class
+# Concrete subclasses for CMS type taxonomy
+#
+# Generation date: 2026-01-19
+# Rule compliance: 0b (Type/Types pattern), 53 (slot_fixes.yaml), 39 (RiC-O naming)
+#
+# This is the PLURAL "Types" file - contains all concrete subclasses
+# Abstract base is in CMSType.yaml (singular)
+
+id: https://nde.nl/ontology/hc/class/cms_types
+name: cms_types_class
+title: CMS Types Classes
+
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+  skos: http://www.w3.org/2004/02/skos/core#
+  schema: http://schema.org/
+
+default_prefix: hc
+
+imports:
+  - linkml:types
+  - ./CMSType
+
+classes:
+  # ========================================================================
+  # MUSEUM_CMS - Museum collection management
+  # ========================================================================
+  MuseumCMS:
+    is_a: CMSType
+    class_uri: hc:MuseumCMS
+    description: |
+      Collection management systems designed for museum collections.
+      
+      **TYPICAL FEATURES**:
+      - Object cataloging and registration
+      - Provenance tracking
+      - Exhibition management
+      - Loan management
+      - Conservation records
+      - SPECTRUM workflow support
+      
+      **EXAMPLES**:
+      - MuseumPlus (Zetcom)
+      - TMS - The Museum System (Gallery Systems)
+      - CollectiveAccess
+      - Adlib (Axiell)
+      - EMu (Axiell)
+      - PastPerfect
+      
+    annotations:
+      cms_type_code: "MUSEUM_CMS"
+      primary_domain: "museums"
+    examples:
+      - value:
+          has_or_had_label: "MUSEUM_CMS"
+          has_or_had_description:
+            description_text: "Collection management systems designed for museum collections, including object cataloging, provenance tracking, and exhibition management."
+        description: Museum CMS type
+
+  # ========================================================================
+  # ARCHIVE_CMS - Archival description systems
+  # ========================================================================
+  ArchiveCMS:
+    is_a: CMSType
+    class_uri: hc:ArchiveCMS
+    description: |
+      Systems for archival description and records management.
+      
+      **TYPICAL FEATURES**:
+      - Hierarchical description (fonds, series, files, items)
+      - ISAD(G) compliance
+      - EAD export
+      - Access restrictions management
+      - Finding aid generation
+      
+      **EXAMPLES**:
+      - ArchivesSpace
+      - MAIS-Flexis (De Ree)
+      - Calm (Axiell)
+      - AtoM (Access to Memory)
+      - Archivist's Toolkit (legacy)
+      
+    annotations:
+      cms_type_code: "ARCHIVE_CMS"
+      primary_domain: "archives"
+    examples:
+      - value:
+          has_or_had_label: "ARCHIVE_CMS"
+          has_or_had_description:
+            description_text: "Archival description systems supporting hierarchical arrangement, ISAD(G) compliance, and EAD export."
+        description: Archive CMS type
+
+  # ========================================================================
+  # LIBRARY_CMS - Library management systems
+  # ========================================================================
+  LibraryCMS:
+    is_a: CMSType
+    class_uri: hc:LibraryCMS
+    description: |
+      Integrated library systems (ILS) and library service platforms.
+      
+      **TYPICAL FEATURES**:
+      - Cataloging (MARC21, RDA)
+      - Circulation management
+      - Acquisitions
+      - Serials management
+      - OPAC (public catalog)
+      - Interlibrary loan
+      
+      **EXAMPLES**:
+      - Alma (Ex Libris)
+      - Koha (open-source)
+      - WorldShare (OCLC)
+      - Folio (open-source)
+      - Sierra (III)
+      - Symphony (SirsiDynix)
+      
+    annotations:
+      cms_type_code: "LIBRARY_CMS"
+      primary_domain: "libraries"
+    examples:
+      - value:
+          has_or_had_label: "LIBRARY_CMS"
+          has_or_had_description:
+            description_text: "Integrated library systems supporting MARC21 cataloging, circulation, acquisitions, and OPAC functionality."
+        description: Library CMS type
+
+  # ========================================================================
+  # DAM - Digital Asset Management
+  # ========================================================================
+  DigitalAssetManagement:
+    is_a: CMSType
+    class_uri: hc:DigitalAssetManagement
+    description: |
+      Digital asset management systems for media files.
+      
+      **TYPICAL FEATURES**:
+      - Image, video, audio management
+      - Metadata extraction
+      - Format conversion
+      - Rights management
+      - Distribution workflows
+      
+      **EXAMPLES**:
+      - ResourceSpace
+      - DAMsimple
+      - Razuna
+      - Pimcore
+      - Bynder
+      - Canto
+      
+    annotations:
+      cms_type_code: "DAM"
+      primary_domain: "digital_assets"
+    examples:
+      - value:
+          has_or_had_label: "DAM"
+          has_or_had_description:
+            description_text: "Digital asset management systems for organizing, storing, and distributing media files including images, video, and audio."
+        description: DAM type
+
+  # ========================================================================
+  # REPOSITORY - Digital repository systems
+  # ========================================================================
+  DigitalRepository:
+    is_a: CMSType
+    class_uri: hc:DigitalRepository
+    description: |
+      Digital repository systems for long-term preservation and access.
+      
+      **TYPICAL FEATURES**:
+      - Long-term preservation
+      - OAI-PMH harvesting
+      - DOI/Handle assignment
+      - Bitstream management
+      - OAIS compliance
+      
+      **EXAMPLES**:
+      - DSpace
+      - Fedora (Flexible Extensible Digital Object Repository Architecture)
+      - EPrints
+      - Islandora (Drupal + Fedora)
+      - Samvera (formerly Hydra)
+      - Preservica
+      
+    annotations:
+      cms_type_code: "REPOSITORY"
+      primary_domain: "digital_preservation"
+    examples:
+      - value:
+          has_or_had_label: "REPOSITORY"
+          has_or_had_description:
+            description_text: "Digital repository systems for long-term preservation, OAI-PMH harvesting, and OAIS-compliant storage."
+        description: Digital repository type
+
+  # ========================================================================
+  # MIXED - Multi-domain systems
+  # ========================================================================
+  MixedCMS:
+    is_a: CMSType
+    class_uri: hc:MixedCMS
+    description: |
+      Multi-domain systems that serve museums, archives, and/or libraries.
+      
+      **TYPICAL FEATURES**:
+      - Flexible data models
+      - Multiple metadata standards
+      - Cross-domain searching
+      - Configurable workflows
+      
+      **EXAMPLES**:
+      - Omeka S (museums, archives, libraries)
+      - CollectiveAccess (museums, archives)
+      - ArchivesSpace + plugins
+      - ResourceSpace with customization
+      
+    annotations:
+      cms_type_code: "MIXED"
+      primary_domain: "multi-domain"
+    examples:
+      - value:
+          has_or_had_label: "MIXED"
+          has_or_had_description:
+            description_text: "Multi-domain collection management systems that can serve museums, archives, and/or libraries with flexible data models."
+        description: Mixed CMS type
+
+  # ========================================================================
+  # CUSTOM - Institution-specific/custom-built
+  # ========================================================================
+  CustomCMS:
+    is_a: CMSType
+    class_uri: hc:CustomCMS
+    description: |
+      Institution-specific or custom-built collection management systems.
+      
+      **TYPICAL FEATURES**:
+      - Tailored to institutional needs
+      - May be legacy systems
+      - Often lack standard API/export
+      - Proprietary data models
+      
+      **EXAMPLES**:
+      - In-house developed systems
+      - Heavily customized commercial systems
+      - Legacy database applications
+      - Spreadsheet-based systems (transitional)
+      
+    annotations:
+      cms_type_code: "CUSTOM"
+      primary_domain: "custom"
+    examples:
+      - value:
+          has_or_had_label: "CUSTOM"
+          has_or_had_description:
+            description_text: "Institution-specific or custom-built collection management systems, often legacy or heavily customized."
+        description: Custom CMS type
--- a/schemas/20251121/linkml/modules/classes/CallForApplication.yaml
+++ b/schemas/20251121/linkml/modules/classes/CallForApplication.yaml
@ -32,7 +32,9 @@ imports:
  - ./URL  # for has_or_had_url range
  - ./Identifier  # for has_or_had_identifier range
  # NOTE: has_or_had_status uses CallForApplicationStatusEnum (imported above), not a CallStatus class
-  - ../slots/co_funding_required
+  # REMOVED 2026-01-19: co_funding_required - migrated to requires_or_required + CoFunding (Rule 53)
+  - ../slots/requires_or_required  # was: co_funding_required - migrated per Rule 53 (2026-01-19)
+  - ./CoFunding  # for requires_or_required range (co-funding requirements)
  - ../slots/eligible_applicant
  - ../slots/eligible_country
  - ../slots/funded_project
@ -115,7 +117,8 @@ classes:
    - has_or_had_label  # was: call_short_name, call_title - migrated per Rule 53 (2026-01-17)
    - has_or_had_status  # was: call_status - migrated per Rule 53 (2026-01-17)
    - has_or_had_url  # was: call_url - migrated per Rule 53 (2026-01-17)
-    - co_funding_required
+    # REMOVED 2026-01-19: co_funding_required - migrated to requires_or_required + CoFunding (Rule 53)
+    - requires_or_required  # was: co_funding_required - migrated per Rule 53 (2026-01-19)
    - contact_email
    - eligible_applicant
    - eligible_country
@ -317,6 +320,27 @@ classes:
          description: Project funded by this call
        - value: https://nde.nl/ontology/hc/project/europeana/common-culture-2024
          description: Europeana project funded through Horizon Europe
+      requires_or_required:  # was: co_funding_required - migrated per Rule 53 (2026-01-19)
+        range: CoFunding
+        multivalued: false
+        inlined: true
+        description: |
+          Co-funding/match funding requirement for this call.
+          MIGRATED from co_funding_required (boolean) to structured CoFunding class per Rule 53 (2026-01-19).
+          Now captures whether co-funding is required, percentage/amount requirements, and human-readable descriptions.
+        examples:
+        - value:
+            is_or_was_required: true
+            has_or_had_description: "Partnership funding 5-50% depending on grant size"
+          description: NLHF co-funding requirement with percentage range
+        - value:
+            is_or_was_required: true
+            has_or_had_quantity:
+              - quantity_value: 20
+                has_or_had_measurement_unit:
+                  unit_label: "%"
+            has_or_had_description: "Minimum 20% co-funding from applicant organization"
+          description: Co-funding with specific percentage requirement
    comments:
    - CallForApplication links FundingOrganisation to heritage custodian funding opportunities
    - Lifecycle tracked via CallForApplicationStatusEnum (ANNOUNCED through RESULTS_PUBLISHED)
@ -466,7 +490,9 @@ classes:
        - Natural heritage
        - Intangible heritage
        - Industrial heritage
-        co_funding_required: true
+        requires_or_required:  # was: co_funding_required - migrated per Rule 53 (2026-01-19)
+          is_or_was_required: true
+          has_or_had_description: "Partnership funding 5-50% depending on grant size"
        partnership_required: false
        issuing_organisation: https://nde.nl/ontology/hc/encompassing-body/funding/nlhf
        parent_programme: National Lottery Heritage Fund
--- a/schemas/20251121/linkml/modules/classes/CoFunding.yaml
+++ b/schemas/20251121/linkml/modules/classes/CoFunding.yaml
@ -0,0 +1,137 @@
+# CoFunding - Co-funding/match funding requirement
+# Created 2026-01-19 per slot_fixes.yaml revision for co_funding_required
+# Rule 53: Generic slot + structured class pattern
+id: https://nde.nl/ontology/hc/class/CoFunding
+name: CoFunding
+title: CoFunding Class
+version: 1.0.0
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+  schema: http://schema.org/
+  dcterms: http://purl.org/dc/terms/
+imports:
+  - linkml:types
+  - ../slots/has_or_had_description
+  - ../slots/is_or_was_required
+  - ../slots/has_or_had_quantity
+  - ./Quantity
+  - ./MeasureUnit
+  - ../enums/MeasureUnitEnum
+default_prefix: hc
+
+classes:
+  CoFunding:
+    class_uri: schema:MonetaryAmount
+    description: |
+      Co-funding or match funding requirement for a funding call or grant.
+      
+      Co-funding represents the financial contribution that an applicant must
+      provide alongside the grant funding. This may be expressed as:
+      - A percentage of total project cost (e.g., 30% co-funding required)
+      - A minimum absolute amount (e.g., €50,000 minimum co-funding)
+      - In-kind contributions (staff time, facilities, equipment)
+      
+      **ONTOLOGY ALIGNMENT**:
+      - schema:MonetaryAmount - For monetary co-funding amounts
+      - schema:percentageValue - For percentage-based requirements
+      
+      **MIGRATION NOTE**:
+      Replaces simple boolean `co_funding_required` slot with structured class
+      that captures co-funding amount, percentage, and type information.
+      
+      **USAGE**:
+      - CallForApplication requires_or_required CoFunding
+      - Grant has_or_had_cofunding CoFunding
+      
+      **EXAMPLES**:
+      - Horizon Europe: 0% co-funding for academic partners (100% funding rate)
+      - National Lottery Heritage Fund: 5-50% partnership funding required
+      - Creative Europe: 40% co-funding required (60% EU contribution)
+    exact_mappings:
+      - schema:MonetaryAmount
+    close_mappings:
+      - schema:percentageValue
+    related_mappings:
+      - schema:Grant
+      - schema:FundingScheme
+    slots:
+      - is_or_was_required
+      - has_or_had_description
+      - has_or_had_quantity
+    slot_usage:
+      is_or_was_required:
+        required: true
+        range: boolean
+        description: |
+          Whether co-funding is required for this funding opportunity.
+          True = applicants must provide matching funds.
+          False = full funding provided (no co-funding required).
+        examples:
+          - value: true
+            description: Co-funding required (e.g., 30% match)
+          - value: false
+            description: Full funding provided (100% grant rate)
+      has_or_had_description:
+        range: string
+        description: |
+          Human-readable description of co-funding requirements.
+          May include eligibility notes, in-kind contribution rules, etc.
+        examples:
+          - value: "30% co-funding required; in-kind contributions accepted up to 10%"
+            description: Mixed co-funding with in-kind allowance
+          - value: "Partnership funding required ranging from 5% to 50% depending on grant size"
+            description: Sliding scale co-funding
+      has_or_had_quantity:
+        range: Quantity
+        multivalued: true
+        inlined: true
+        inlined_as_list: true
+        description: |
+          Quantified co-funding requirements expressed as:
+          - Percentage (e.g., 30% of total project cost)
+          - Minimum amount (e.g., €50,000)
+          - Maximum amount (e.g., up to €1,000,000)
+        examples:
+          - value:
+              quantity_value: 30
+              has_or_had_measurement_unit:
+                unit_label: "%"
+            description: 30% co-funding percentage
+          - value:
+              quantity_value: 50000
+              has_or_had_measurement_unit:
+                unit_label: EUR
+            description: Minimum €50,000 co-funding
+    comments:
+      - Replaces simple co_funding_required boolean with structured class
+      - Captures both percentage and absolute co-funding amounts
+      - In-kind contributions tracked via description field
+      - Links to Quantity for precise numerical requirements
+    see_also:
+      - https://schema.org/MonetaryAmount
+      - https://ec.europa.eu/research/participants/docs/h2020-funding-guide/grants/applying-for-funding/find-a-call/what-you-need-to-know_en.htm
+    examples:
+      - value:
+          is_or_was_required: true
+          has_or_had_description: "30% co-funding required for all project costs"
+          has_or_had_quantity:
+            - quantity_value: 30
+              has_or_had_measurement_unit:
+                unit_label: "%"
+        description: EU Creative Europe style co-funding (30%)
+      - value:
+          is_or_was_required: true
+          has_or_had_description: "Partnership funding 5-50% depending on grant size; in-kind contributions permitted"
+          has_or_had_quantity:
+            - quantity_value: 5
+              has_or_had_measurement_unit:
+                unit_label: "%"
+            - quantity_value: 50
+              has_or_had_measurement_unit:
+                unit_label: "%"
+        description: NLHF sliding scale co-funding range
+      - value:
+          is_or_was_required: false
+          has_or_had_description: "100% funding rate for academic and non-profit partners"
+        description: Horizon Europe full funding (no co-funding)
--- a/schemas/20251121/linkml/modules/classes/CollectionManagementSystem.yaml
+++ b/schemas/20251121/linkml/modules/classes/CollectionManagementSystem.yaml
@ -12,12 +12,17 @@ imports:
  - ../slots/documentation_url
  - ./ReconstructedEntity
  - ../slots/is_or_was_available  # MIGRATED: was ../slots/api_available (2026-01-15)
-  - ../slots/cms_category
+  # REMOVED 2026-01-19: ../slots/cms_category - migrated to has_or_had_type + CMSType (Rule 53)
+  - ../slots/has_or_had_type  # was: cms_category - migrated per Rule 53 (2026-01-19)
+  - ./CMSType
+  - ./CMSTypes
  # REMOVED 2026-01-18: ../slots/cms_id - migrated to has_or_had_identifier + Identifier (Rule 53)
  - ../slots/has_or_had_identifier  # was: cms_id - migrated per Rule 53 (2026-01-18)
  - ./Identifier
  # REMOVED 2026-01-18: ../slots/cms_product_name - migrated to has_or_had_label with Label (type: product_name)
-  - ../slots/cms_product_version
+  # REMOVED 2026-01-19: ../slots/cms_product_version - migrated to has_or_had_version + Version (Rule 53)
+  - ../slots/has_or_had_version  # was: cms_product_version - migrated per Rule 53 (2026-01-19)
+  - ./Version
  - ../slots/has_or_had_custodian_type
  - ../slots/deployment_date
  - ../slots/iiif_compatible
@ -114,10 +119,12 @@ classes:
    - rico:Activity
    slots:
    - is_or_was_available  # MIGRATED: was api_available (2026-01-15)
-    - cms_category
+    # REMOVED 2026-01-19: cms_category - migrated to has_or_had_type with CMSType
+    - has_or_had_type  # was: cms_category - migrated per Rule 53 (2026-01-19)
    - has_or_had_identifier  # was: cms_id - migrated per Rule 53 (2026-01-18)
    # REMOVED 2026-01-18: cms_product_name - migrated to has_or_had_label with Label (type: product_name)
-    - cms_product_version
+    # REMOVED 2026-01-19: cms_product_version - migrated to has_or_had_version + Version (Rule 53)
+    - has_or_had_version  # was: cms_product_version - migrated per Rule 53 (2026-01-19)
    - has_or_had_custodian_type
    - deployment_date
    - documentation_url
@ -177,18 +184,65 @@ classes:
          See has_or_had_label slot_usage for current pattern.
        deprecated: "Use has_or_had_label with Label(has_or_had_type='product_name')"
      cms_product_version:
-        range: string
+        description: |
+          DEPRECATED 2026-01-19: Migrated to has_or_had_version slot with Version class.
+          This slot_usage entry retained for documentation only.
+          See has_or_had_version slot_usage for current pattern.
+        deprecated: "Use has_or_had_version with Version class"
+      has_or_had_version:  # was: cms_product_version - migrated per Rule 53 (2026-01-19)
+        description: |
+          MIGRATED from cms_product_version per slot_fixes.yaml (Rule 53, 2026-01-19).
+          Version of the CMS software deployed.
+          
+          Uses Version class for structured version representation:
+          - version_string: Full version (e.g., "1.8.0", "7.4")
+          - major_version, minor_version, patch_version: Semantic versioning components
+          - release_date: When this version was released
+          - temporal_extent: When this version was deployed at the custodian
+        range: Version
+        multivalued: true
+        inlined_as_list: true
        examples:
-        - value: 1.8.0
-          description: CollectiveAccess version
-        - value: '7.0'
+        - value:
+            version_string: "1.8.0"
+            major_version: 1
+            minor_version: 8
+            patch_version: 0
+          description: CollectiveAccess version with semantic components
+        - value:
+            version_string: "7.4"
+            major_version: 7
+            minor_version: 4
          description: MuseumPlus version
      cms_category:
-        range: string
+        description: |
+          DEPRECATED 2026-01-19: Migrated to has_or_had_type slot with CMSType class.
+          This slot_usage entry retained for documentation only.
+          See has_or_had_type slot_usage for current pattern.
+        deprecated: "Use has_or_had_type with CMSType class"
+      has_or_had_type:  # was: cms_category - migrated per Rule 53 (2026-01-19)
+        description: |
+          MIGRATED from cms_category per slot_fixes.yaml (Rule 53, 2026-01-19).
+          The type of collection management system.
+          
+          Uses CMSType class hierarchy for structured type representation:
+          - MuseumCMS: Museum-focused collection management (e.g., TMS, CollectiveAccess)
+          - ArchiveCMS: Archives-focused (e.g., ArchivesSpace, MAIS-Flexis)
+          - LibraryCMS: Library-focused (e.g., Koha, Alma)
+          - DigitalAssetManagement: DAM systems (e.g., ResourceSpace)
+          - DigitalRepository: Repository platforms (e.g., DSpace, Fedora)
+          - MixedCMS: Multi-domain systems
+          - CustomCMS: Institution-specific systems
+        range: CMSType
+        inlined: true
        examples:
-        - value: MUSEUM_CMS
+        - value:
+            has_or_had_label: Museum CMS
+            has_or_had_type: museum_cms
          description: Museum-focused CMS
-        - value: ARCHIVE_CMS
+        - value:
+            has_or_had_label: Archive CMS
+            has_or_had_type: archive_cms
          description: Archives-focused CMS
      open_source:
        range: boolean
@ -382,15 +436,20 @@ classes:
    - http://www.cidoc-crm.org/cidoc-crm/E29_Design_or_Procedure
    - http://usefulinc.com/ns/doap#Project
    examples:
-    # Examples updated for migrated slots (Rule 53) - 2026-01-14, 2026-01-16, 2026-01-18
+    # Examples updated for migrated slots (Rule 53) - 2026-01-14, 2026-01-16, 2026-01-18, 2026-01-19
    - value:
        # cms_id migrated to has_or_had_identifier with Identifier class (2026-01-18)
        has_or_had_identifier:
          identifier_scheme: CMS_URI
          identifier_value: "https://nde.nl/ontology/hc/cms/rijksmuseum-adlib"
        # cms_product_name migrated to has_or_had_label with type: product_name (2026-01-18)
-        cms_product_version: '7.4'
-        cms_category: MUSEUM_CMS
+        # cms_product_version migrated to has_or_had_version with Version class (2026-01-19)
+        has_or_had_version:
+          version_string: "7.4"
+          major_version: 7
+          minor_version: 4
+        # cms_category migrated to has_or_had_type with CMSType (2026-01-19)
+        has_or_had_type: MuseumCMS  # was: cms_category: MUSEUM_CMS
        open_source: false
        license: Proprietary
        has_or_had_label:  # was: vendor_name AND cms_product_name - now uses Label with type discrimination
@ -425,8 +484,14 @@ classes:
          identifier_scheme: CMS_URI
          identifier_value: "https://nde.nl/ontology/hc/cms/example-museum-collectiveaccess"
        # cms_product_name migrated to has_or_had_label with type: product_name (2026-01-18)
-        cms_product_version: 1.8.0
-        cms_category: MUSEUM_CMS
+        # cms_product_version migrated to has_or_had_version with Version class (2026-01-19)
+        has_or_had_version:
+          version_string: "1.8.0"
+          major_version: 1
+          minor_version: 8
+          patch_version: 0
+        # cms_category migrated to has_or_had_type with CMSType (2026-01-19)
+        has_or_had_type: MuseumCMS  # was: cms_category: MUSEUM_CMS
        open_source: true
        license: GPL-3.0
        has_or_had_label:  # was: vendor_name AND cms_product_name - now uses Label with type discrimination
@ -462,8 +527,10 @@ classes:
          identifier_scheme: CMS_URI
          identifier_value: "https://nde.nl/ontology/hc/cms/nationaal-archief-mais"
        # cms_product_name migrated to has_or_had_label with type: product_name (2026-01-18)
-        cms_product_version: null
-        cms_category: ARCHIVE_CMS
+        # cms_product_version migrated to has_or_had_version with Version class (2026-01-19)
+        # Version unknown for this CMS deployment
+        # cms_category migrated to has_or_had_type with CMSType (2026-01-19)
+        has_or_had_type: ArchiveCMS  # was: cms_category: ARCHIVE_CMS
        open_source: false
        license: Proprietary
        has_or_had_label:  # was: vendor_name AND cms_product_name - now uses Label with type discrimination
--- a/schemas/20251121/linkml/modules/classes/EducationProviderType.yaml
+++ b/schemas/20251121/linkml/modules/classes/EducationProviderType.yaml
@ -66,7 +66,8 @@ imports:
  - ./TemplateSpecificityTypes
  - ../slots/education_level
  - ../slots/has_or_had_academic_program
-  - ../slots/collection_access
+  - ../slots/offers_or_offered_access
+  - ./Access
  # REMOVED 2026-01-15: teaching_collection, student_service imports - defined locally as attributes, slots archived
  - ../slots/has_or_had_accreditation
  - ../slots/education_provider_subtype
@ -367,77 +368,15 @@ classes:
        range: string
        multivalued: true
        slot_uri: aiiso:programme
-      collection_access:
-        description: 'Access policies for heritage collections, especially concerning student and faculty use.
-
-
-          Academic Community Access:
-
-          - Students enrolled: Undergraduate, graduate, doctoral students
-
-          - Faculty and staff: Teaching faculty, research faculty, emeritus
-
-          - Academic affiliates: Visiting scholars, postdocs, adjuncts
-
-
-          Curriculum Integration:
-
-          - Class visits: Scheduled visits as part of coursework
-
-          - Hands-on learning: Object-based teaching with collection items
-
-          - Laboratory access: Specimen examination for science students
-
-          - Research use: Thesis/dissertation research, faculty research projects
-
-
-          External Access:
-
-          - Public visiting hours: Open to general public (specific days/times)
-
-          - Appointment required: By-appointment access for researchers
-
-          - Restricted access: Academic credentials required
-
-          - Membership programs: Community membership for non-affiliated users
-
-
-          Digital Access:
-
-          - Online catalog: Searchable collection database
-
-          - Digital collections: Digitized materials available online
-
-          - Virtual exhibitions: Online exhibition programming
-
-          - Learning management integration: Collections in course management systems
-
-
-          Special Restrictions:
-
-          - Conservation concerns: Fragile materials limited access
-
-          - Donor restrictions: Bequest conditions limiting use
-
-          - Privacy restrictions: Student records, personnel files
-
-          - Security restrictions: High-value items in secure storage
-
-
-          Examples:
-
-          - "Open to enrolled students and faculty; public by appointment"
-
-          - "Class visits scheduled through instructors; public gallery hours Wednesday-Saturday"
-
-          - "Digital collections open access; physical materials require university ID"
-
-
-          This field maps to Schema.org and CIDOC-CRM access properties.
-
-          '
-        range: string
-        slot_uri: schema:publicAccess
+      offers_or_offered_access:
+        description: >-
+          Access offerings for heritage collections, especially concerning student and faculty use.
+          Uses structured Access class to capture access type, eligible users, conditions, and restrictions.
+          Education providers typically offer multiple access types for different user groups.
+        range: Access
+        multivalued: true
+        inlined: true
+        inlined_as_list: true
      teaching_collection:
        description: 'Description of collections specifically maintained for educational purposes and

--- a/schemas/20251121/linkml/modules/classes/Exhibition.yaml
+++ b/schemas/20251121/linkml/modules/classes/Exhibition.yaml
@ -25,7 +25,10 @@ imports:
  - ../slots/has_or_had_identifier
  - ./WikiDataIdentifier
  - ../slots/exhibition_type
-  - ../slots/co_organized_by
+  # REMOVED 2026-01-19: co_organized_by - migrated to has_or_had_organizer + Organizer (Rule 53)
+  - ../slots/has_or_had_organizer
+  - ./Organizer
+  - ./OrganizerRole
  - ../slots/curated_by
  - ../slots/has_or_had_custodian_type
  - ../slots/exhibition_catalog_url
@ -92,7 +95,8 @@ classes:
    - schema:Event
    - crm:E4_Period
    slots:
-    - co_organized_by
+    # REMOVED 2026-01-19: co_organized_by - migrated to has_or_had_organizer + Organizer (Rule 53)
+    - has_or_had_organizer
    - curated_by
    - has_or_had_custodian_type
    - end_date
@ -168,13 +172,42 @@ classes:
        examples:
        - value: https://nde.nl/ontology/hc/custodian/nl/rijksmuseum
        - value: https://nde.nl/ontology/hc/custodian/nl/mauritshuis
-      co_organized_by:
+      # REMOVED 2026-01-19: co_organized_by - migrated to has_or_had_organizer + Organizer (Rule 53)
+      # co_organized_by:
+      #   required: false
+      #   range: uriorcurie
+      #   multivalued: true
+      #   inlined: false
+      #   examples:
+      #   - value: https://nde.nl/ontology/hc/custodian/us/national-gallery-washington
+      has_or_had_organizer:
        required: false
-        range: uriorcurie
+        range: Organizer
        multivalued: true
-        inlined: false
+        inlined: true
+        inlined_as_list: true
+        description: |
+          Organizations that organize this exhibition.
+          MIGRATED 2026-01-19: Replaces co_organized_by slot per Rule 53.
+          Includes primary organizers, co-organizers, sponsors with curatorial input.
        examples:
-        - value: https://nde.nl/ontology/hc/custodian/us/national-gallery-washington
+        - value:
+            organizer_entity: https://nde.nl/ontology/hc/custodian/nl/rijksmuseum
+            has_or_had_role:
+              role_type: PRIMARY
+          description: "Rijksmuseum as primary organizer"
+        - value:
+            organizer_entity: https://nde.nl/ontology/hc/custodian/nl/mauritshuis
+            has_or_had_role:
+              role_type: CO_ORGANIZER
+            organizer_contribution: "Provided key loans including Girl with a Pearl Earring"
+          description: "Mauritshuis as co-organizer"
+        - value:
+            organizer_entity: https://nde.nl/ontology/hc/custodian/us/national-gallery-washington
+            has_or_had_role:
+              role_type: LENDING_INSTITUTION
+            organizer_contribution: "Lent Woman Holding a Balance"
+          description: "National Gallery Washington as lending institution"
      curated_by:
        required: false
        range: string
@ -360,10 +393,15 @@ classes:

          '
        exhibition_type: BLOCKBUSTER
-        organized_by:
-        - https://nde.nl/ontology/hc/custodian/nl/rijksmuseum
-        co_organized_by:
-        - https://nde.nl/ontology/hc/custodian/nl/mauritshuis
+        # MIGRATED 2026-01-19: organized_by/co_organized_by → has_or_had_organizer + Organizer (Rule 53)
+        has_or_had_organizer:
+        - organizer_entity: https://nde.nl/ontology/hc/custodian/nl/rijksmuseum
+          has_or_had_role:
+            role_type: PRIMARY
+        - organizer_entity: https://nde.nl/ontology/hc/custodian/nl/mauritshuis
+          has_or_had_role:
+            role_type: CO_ORGANIZER
+          organizer_contribution: "Provided Girl with a Pearl Earring and 5 other Vermeers"
        curated_by:
        - Pieter Roelofs
        - Gregor J.M. Weber
@ -407,8 +445,10 @@ classes:
        exhibition_name: Voices from the War
        exhibition_subtitle: Personal Stories from World War II Archives
        exhibition_type: ARCHIVAL
-        organized_by:
-        - https://nde.nl/ontology/hc/custodian/nl/nationaal-archief
+        has_or_had_organizer:
+        - organizer_entity: https://nde.nl/ontology/hc/custodian/nl/nationaal-archief
+          has_or_had_role:
+            role_type: PRIMARY
        start_date: '2024-05-04'
        end_date: '2024-11-11'
        exhibition_location:
@ -428,8 +468,10 @@ classes:

          '
        exhibition_type: PERMANENT
-        organized_by:
-        - https://nde.nl/ontology/hc/custodian/nl/rijksmuseum
+        has_or_had_organizer:
+        - organizer_entity: https://nde.nl/ontology/hc/custodian/nl/rijksmuseum
+          has_or_had_role:
+            role_type: PRIMARY
        exhibition_venue: Gallery of Honour (Eregalerij)
        featured_work:
        - The Night Watch (Rembrandt)
--- a/schemas/20251121/linkml/modules/classes/NotableExample.yaml
+++ b/schemas/20251121/linkml/modules/classes/NotableExample.yaml
@ -0,0 +1,32 @@
+id: https://nde.nl/ontology/hc/class/NotableExample
+name: NotableExample-class
+
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+  skos: http://www.w3.org/2004/02/skos/core#
+  schema: http://schema.org/
+
+default_prefix: hc
+
+imports:
+  - linkml:types
+  - ../slots/example_name
+  - ../slots/example_location
+  - ../slots/example_wikidata_id
+  - ../slots/example_note
+
+classes:
+  NotableExample:
+    class_uri: hc:NotableExample
+    description: |
+      A real-world example of a heritage institution of this type.
+      Provides concrete instances for understanding the class scope.
+    slots:
+      - example_name
+      - example_location
+      - example_wikidata_id
+      - example_note
+    annotations:
+      specificity_score: 0.3
+      specificity_rationale: "Universal utility for concrete examples"
--- a/schemas/20251121/linkml/modules/classes/Organizer.yaml
+++ b/schemas/20251121/linkml/modules/classes/Organizer.yaml
@ -0,0 +1,162 @@
+# Organizer class
+# Entity that organizes events, exhibitions, programs with role specification
+#
+# Created per slot_fixes.yaml revision for co_organized_by migration
+# Generation date: 2026-01-19
+# Rule compliance: 53 (slot_fixes.yaml), 39 (RiC-O naming)
+
+id: https://nde.nl/ontology/hc/class/Organizer
+name: Organizer
+title: Organizer Class
+
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+  schema: http://schema.org/
+  org: http://www.w3.org/ns/org#
+  prov: http://www.w3.org/ns/prov#
+
+default_prefix: hc
+
+imports:
+  - linkml:types
+  - ../metadata
+  - ../slots/has_or_had_role
+  - ./OrganizerRole
+
+classes:
+  Organizer:
+    class_uri: schema:Organization
+    description: |
+      An entity that organizes or organized an event, exhibition, program, or activity.
+      
+      **Purpose**:
+      Captures the organizing entity along with their role, replacing simple
+      uriorcurie references like `co_organized_by` or `organized_by`.
+      
+      **Key Properties**:
+      - `organizer_entity`: Reference to the organizing institution (Custodian, Organization)
+      - `has_or_had_role`: Role of the organizer (PRIMARY, CO_ORGANIZER, etc.)
+      - `organizer_contribution`: Description of organizational contribution
+      
+      **Pattern**:
+      Instead of separate `organized_by` and `co_organized_by` slots with plain URIs,
+      use a single `has_or_had_organizer` slot with Organizer instances that specify roles.
+      
+      **Example Migration**:
+      ```yaml
+      # OLD (deprecated):
+      organized_by:
+        - https://nde.nl/ontology/hc/custodian/nl/rijksmuseum
+      co_organized_by:
+        - https://nde.nl/ontology/hc/custodian/nl/mauritshuis
+      
+      # NEW (Rule 53):
+      has_or_had_organizer:
+        - organizer_entity: https://nde.nl/ontology/hc/custodian/nl/rijksmuseum
+          has_or_had_role:
+            role_type: PRIMARY
+        - organizer_entity: https://nde.nl/ontology/hc/custodian/nl/mauritshuis
+          has_or_had_role:
+            role_type: CO_ORGANIZER
+      ```
+      
+      **Ontological Alignment**:
+      - **Primary**: `schema:Organization` (organizer is an organization)
+      - **Close**: `org:Organization` (W3C Org vocabulary)
+      - **Related**: `prov:Agent` (PROV-O agent in activity)
+      
+    exact_mappings:
+      - schema:Organization
+    
+    close_mappings:
+      - org:Organization
+    
+    related_mappings:
+      - prov:Agent
+    
+    slots:
+      - organizer_entity
+      - has_or_had_role
+      - organizer_contribution
+    
+    slot_usage:
+      organizer_entity:
+        required: true
+        range: uriorcurie
+        description: |
+          Reference to the organizing institution (Custodian, Organization).
+          This is the entity that actually does the organizing.
+        examples:
+          - value: "https://nde.nl/ontology/hc/custodian/nl/rijksmuseum"
+            description: "Rijksmuseum as organizer"
+      
+      has_or_had_role:
+        required: false
+        range: OrganizerRole
+        inlined: true
+        description: |
+          Role of this organizer (PRIMARY, CO_ORGANIZER, SPONSOR_ORGANIZER, etc.).
+          If omitted, implies general organizational involvement.
+        examples:
+          - value:
+              role_type: PRIMARY
+            description: "Primary organizer role"
+      
+      organizer_contribution:
+        required: false
+        range: string
+        description: |
+          Description of organizational contribution.
+          Examples: "Provided 15 works from permanent collection",
+          "Funded conservation of borrowed works", "Curatorial expertise"
+        examples:
+          - value: "Provided 15 works from permanent collection and curatorial expertise"
+            description: "Description of Mauritshuis contribution to Vermeer exhibition"
+    
+    annotations:
+      specificity_score: 0.55
+      specificity_rationale: "Moderately specific - applies to any event organization context"
+      custodian_types: '["*"]'
+      custodian_types_rationale: "Any institution type can organize events/exhibitions"
+    
+    comments:
+      - "Created per slot_fixes.yaml revision for co_organized_by migration"
+      - "Replaces separate organized_by/co_organized_by with role-based discrimination"
+      - "RULE 53: Part of co_organized_by → has_or_had_organizer + Organizer migration"
+    
+    examples:
+      - value:
+          organizer_entity: "https://nde.nl/ontology/hc/custodian/nl/rijksmuseum"
+          has_or_had_role:
+            role_type: PRIMARY
+            role_description: "Main organizing institution"
+        description: "Rijksmuseum as primary organizer of Vermeer exhibition"
+      
+      - value:
+          organizer_entity: "https://nde.nl/ontology/hc/custodian/nl/mauritshuis"
+          has_or_had_role:
+            role_type: CO_ORGANIZER
+            role_description: "Partner institution providing key loans"
+          organizer_contribution: "Provided Girl with a Pearl Earring and 5 other Vermeers"
+        description: "Mauritshuis as co-organizer with specific contribution"
+      
+      - value:
+          organizer_entity: "https://nde.nl/ontology/hc/custodian/us/national-gallery-washington"
+          has_or_had_role:
+            role_type: LENDING_INSTITUTION
+          organizer_contribution: "Lent Woman Holding a Balance"
+        description: "National Gallery Washington as lending institution"
+
+slots:
+  organizer_entity:
+    slot_uri: schema:organizer
+    description: Reference to the organizing institution
+    range: uriorcurie
+    required: true
+  
+  organizer_contribution:
+    slot_uri: schema:description
+    description: Description of organizational contribution
+    range: string
+    required: false
--- a/schemas/20251121/linkml/modules/classes/OrganizerRole.yaml
+++ b/schemas/20251121/linkml/modules/classes/OrganizerRole.yaml
@ -0,0 +1,121 @@
+# OrganizerRole class
+# Enumeration-like class for organizer roles in events/exhibitions
+#
+# Created per slot_fixes.yaml revision for co_organized_by migration
+# Generation date: 2026-01-19
+# Rule compliance: 53 (slot_fixes.yaml), 39 (RiC-O naming), 0b (Type/Types pattern)
+
+id: https://nde.nl/ontology/hc/class/OrganizerRole
+name: OrganizerRole
+title: Organizer Role Class
+
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+  schema: http://schema.org/
+  skos: http://www.w3.org/2004/02/skos/core#
+  prov: http://www.w3.org/ns/prov#
+
+default_prefix: hc
+
+imports:
+  - linkml:types
+  - ../metadata
+
+classes:
+  OrganizerRole:
+    class_uri: schema:Role
+    description: |
+      Role of an organizer in an event, exhibition, or program.
+      
+      **Purpose**:
+      Distinguishes between different types of organizational involvement:
+      - PRIMARY: Main organizing institution
+      - CO_ORGANIZER: Partner institution with significant organizational role
+      - SPONSOR_ORGANIZER: Sponsor with curatorial/organizational input
+      - LENDING_INSTITUTION: Institution lending objects with exhibition involvement
+      - HOST_VENUE: Venue hosting a traveling exhibition
+      
+      **Pattern**:
+      Used with Organizer class to specify the role of an organizing entity.
+      
+      **Ontological Alignment**:
+      - **Primary**: `schema:Role` - Schema.org role
+      - **Close**: `prov:Role` - PROV-O role in activity
+      
+    exact_mappings:
+      - schema:Role
+    
+    close_mappings:
+      - prov:Role
+    
+    slots:
+      - role_type
+      - role_description
+    
+    slot_usage:
+      role_type:
+        required: true
+        range: OrganizerRoleTypeEnum
+        description: Type of organizer role (PRIMARY, CO_ORGANIZER, etc.)
+      role_description:
+        required: false
+        range: string
+        description: Additional description of the role
+    
+    annotations:
+      specificity_score: 0.65
+      specificity_rationale: "Fairly specific - applies to event/exhibition organization contexts"
+      custodian_types: '["M", "G", "A", "L", "R"]'
+      custodian_types_rationale: "Primarily used by museums, galleries, archives, libraries, research centers that organize exhibitions"
+    
+    comments:
+      - "Created per slot_fixes.yaml revision for co_organized_by migration"
+      - "Used with Organizer class to specify organizational involvement"
+      - "RULE 53: Part of co_organized_by → has_or_had_organizer + Organizer migration"
+    
+    examples:
+      - value:
+          role_type: PRIMARY
+          role_description: "Main organizing institution"
+        description: "Primary organizer role"
+      - value:
+          role_type: CO_ORGANIZER
+          role_description: "Partner institution contributing loans and curatorial expertise"
+        description: "Co-organizer role with description"
+      - value:
+          role_type: LENDING_INSTITUTION
+          role_description: "Major lender with exhibition advisory role"
+        description: "Lending institution with organizational involvement"
+
+slots:
+  role_type:
+    slot_uri: schema:roleName
+    description: Type of organizer role
+    range: string
+    required: true
+  
+  role_description:
+    slot_uri: schema:description
+    description: Additional description of the organizational role
+    range: string
+    required: false
+
+enums:
+  OrganizerRoleTypeEnum:
+    description: Types of organizer roles
+    permissible_values:
+      PRIMARY:
+        description: Main organizing institution
+      CO_ORGANIZER:
+        description: Partner institution with significant organizational role
+      SPONSOR_ORGANIZER:
+        description: Sponsor with curatorial/organizational input
+      LENDING_INSTITUTION:
+        description: Institution lending objects with exhibition involvement
+      HOST_VENUE:
+        description: Venue hosting a traveling exhibition
+      SUPPORTING_PARTNER:
+        description: Supporting partner institution
+      ADVISOR:
+        description: Advisory organization
--- a/schemas/20251121/linkml/modules/classes/RelatedType.yaml
+++ b/schemas/20251121/linkml/modules/classes/RelatedType.yaml
@ -0,0 +1,33 @@
+id: https://nde.nl/ontology/hc/class/RelatedType
+name: RelatedType-class
+
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+  skos: http://www.w3.org/2004/02/skos/core#
+  schema: http://schema.org/
+  dcterms: http://purl.org/dc/terms/
+
+default_prefix: hc
+
+imports:
+  - linkml:types
+  - ../slots/related_type_name
+  - ../slots/related_type_wikidata
+  - ../slots/related_type_relationship
+  - ../slots/related_type_note
+
+classes:
+  RelatedType:
+    class_uri: hc:RelatedType
+    description: |
+      A reference to a related class in the heritage ontology.
+      Used for documenting relationships between types.
+    slots:
+      - related_type_name
+      - related_type_wikidata
+      - related_type_relationship
+      - related_type_note
+    annotations:
+      specificity_score: 0.3
+      specificity_rationale: "Universal utility for type relationships"
--- a/schemas/20251121/linkml/modules/classes/Version.yaml
+++ b/schemas/20251121/linkml/modules/classes/Version.yaml
@ -0,0 +1,168 @@
+id: https://nde.nl/ontology/hc/class/Version
+name: version_class
+title: Version Class
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+  schema: http://schema.org/
+  prov: http://www.w3.org/ns/prov#
+  doap: http://usefulinc.com/ns/doap#
+imports:
+  - linkml:types
+  - ../slots/has_or_had_label
+  - ../slots/has_or_had_identifier
+  - ../slots/temporal_extent
+  - ./TimeSpan
+default_prefix: hc
+classes:
+  Version:
+    class_uri: schema:SoftwareApplication
+    description: |
+      A version identifier for software, documents, schemas, or other entities.
+      
+      **Purpose**: Represents a structured version record with version number,
+      release date, and semantic versioning components.
+      
+      **Semantic Versioning Support**:
+      - major_version: Breaking changes
+      - minor_version: New features (backwards compatible)
+      - patch_version: Bug fixes
+      
+      **Use Cases**:
+      1. **CMS Product Version**: Version of deployed CMS software
+      2. **API Version**: REST API version
+      3. **Schema Version**: Ontology/schema version
+      4. **Document Version**: Document revision number
+      
+      **Example**:
+      ```yaml
+      CollectionManagementSystem:
+        cms_name: CollectiveAccess
+        has_or_had_version:
+          version_string: "1.8.0"
+          major_version: 1
+          minor_version: 8
+          patch_version: 0
+          release_date: "2023-06-15"
+      ```
+      
+      **Migration Note**: Created 2026-01-19 per slot_fixes.yaml (Rule 53).
+      Replaces simple string cms_product_version with structured Version class.
+    exact_mappings:
+      - schema:version
+      - doap:Version
+    slots:
+      - version_string
+      - major_version
+      - minor_version
+      - patch_version
+      - prerelease_tag
+      - build_metadata
+      - release_date
+      - temporal_extent
+    slot_usage:
+      version_string:
+        description: Full version string (e.g., "1.8.0", "v3.2.1-beta")
+        range: string
+        required: true
+        examples:
+          - value: "1.8.0"
+            description: Semantic version
+          - value: "7.4"
+            description: Two-part version
+          - value: "v3.2.1-beta"
+            description: Version with prerelease tag
+      major_version:
+        description: Major version number (breaking changes)
+        range: integer
+        required: false
+        examples:
+          - value: 1
+            description: Major version 1
+      minor_version:
+        description: Minor version number (new features)
+        range: integer
+        required: false
+        examples:
+          - value: 8
+            description: Minor version 8
+      patch_version:
+        description: Patch version number (bug fixes)
+        range: integer
+        required: false
+        examples:
+          - value: 0
+            description: Patch version 0
+      prerelease_tag:
+        description: Prerelease identifier (e.g., "alpha", "beta", "rc1")
+        range: string
+        required: false
+        examples:
+          - value: beta
+            description: Beta prerelease
+          - value: rc1
+            description: Release candidate 1
+      build_metadata:
+        description: Build metadata (e.g., git commit hash)
+        range: string
+        required: false
+        examples:
+          - value: "20230615.abc123"
+            description: Build date and commit hash
+      release_date:
+        description: Date this version was released
+        range: date
+        required: false
+        examples:
+          - value: "2023-06-15"
+            description: Release date
+      temporal_extent:
+        description: Validity period for this version (when deployed)
+        range: TimeSpan
+        required: false
+        examples:
+          - value:
+              begin_of_the_begin: "2023-06-15"
+              end_of_the_end: null
+            description: Version deployed since June 2023
+    annotations:
+      custodian_types: '["D"]'
+      custodian_types_rationale: Primarily used by digital platforms (D) for software versioning
+      specificity_score: 0.55
+      specificity_rationale: Moderately specific to software/document version contexts
+
+slots:
+  version_string:
+    slot_uri: schema:version
+    description: Full version string
+    range: string
+    exact_mappings:
+      - schema:version
+
+  major_version:
+    slot_uri: doap:revision
+    description: Major version number
+    range: integer
+
+  minor_version:
+    description: Minor version number
+    range: integer
+
+  patch_version:
+    description: Patch version number
+    range: integer
+
+  prerelease_tag:
+    description: Prerelease identifier
+    range: string
+
+  build_metadata:
+    description: Build metadata
+    range: string
+
+  release_date:
+    slot_uri: schema:datePublished
+    description: Release date
+    range: date
+    exact_mappings:
+      - schema:datePublished
--- a/schemas/20251121/linkml/modules/slots/administrative_context.yaml
+++ b/schemas/20251121/linkml/modules/slots/administrative_context.yaml
@ -0,0 +1,23 @@
+id: https://nde.nl/ontology/hc/slot/administrative_context
+name: administrative_context-slot
+
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+
+default_prefix: hc
+
+imports:
+  - linkml:types
+
+slots:
+  administrative_context:
+    slot_uri: hc:administrativeContext
+    description: |
+      Administrative and governmental context.
+      Documents how this type relates to government structures and public administration.
+      
+      **Migrated from**: `**Administrative Context**:` sections.
+    range: string
+    annotations:
+      source_section: "**Administrative Context**:"
--- a/schemas/20251121/linkml/modules/slots/archive/cms_category_archived_20260119.yaml
+++ b/schemas/20251121/linkml/modules/slots/archive/cms_category_archived_20260119.yaml
--- a/schemas/20251121/linkml/modules/slots/archive/cms_detected_archived_20260119.yaml
+++ b/schemas/20251121/linkml/modules/slots/archive/cms_detected_archived_20260119.yaml
--- a/schemas/20251121/linkml/modules/slots/archive/cms_product_version_archived_20260119.yaml
+++ b/schemas/20251121/linkml/modules/slots/archive/cms_product_version_archived_20260119.yaml
--- a/schemas/20251121/linkml/modules/slots/archive/co_funding_required_archived_20260119.yaml
+++ b/schemas/20251121/linkml/modules/slots/archive/co_funding_required_archived_20260119.yaml
--- a/schemas/20251121/linkml/modules/slots/archive/co_organized_by_archived_20260119.yaml
+++ b/schemas/20251121/linkml/modules/slots/archive/co_organized_by_archived_20260119.yaml
--- a/schemas/20251121/linkml/modules/slots/archive/collection_access_archived_20260119.yaml
+++ b/schemas/20251121/linkml/modules/slots/archive/collection_access_archived_20260119.yaml
--- a/schemas/20251121/linkml/modules/slots/archive/collection_date_archived_20260119.yaml
+++ b/schemas/20251121/linkml/modules/slots/archive/collection_date_archived_20260119.yaml
--- a/schemas/20251121/linkml/modules/slots/characteristics.yaml
+++ b/schemas/20251121/linkml/modules/slots/characteristics.yaml
@ -0,0 +1,26 @@
+id: https://nde.nl/ontology/hc/slot/characteristics
+name: characteristics-slot
+
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+  dcterms: http://purl.org/dc/terms/
+
+default_prefix: hc
+
+imports:
+  - linkml:types
+
+slots:
+  characteristics:
+    slot_uri: dcterms:description
+    description: |
+      Key characteristics and features of this class.
+      Documents defining traits and capabilities.
+      
+      **Migrated from**: `**Characteristics**:` and `**CHARACTERISTICS**:` sections.
+    range: string
+    multivalued: true
+    inlined_as_list: true
+    annotations:
+      source_section: "**Characteristics**:"
--- a/schemas/20251121/linkml/modules/slots/class_definition.yaml
+++ b/schemas/20251121/linkml/modules/slots/class_definition.yaml
@ -0,0 +1,24 @@
+id: https://nde.nl/ontology/hc/slot/class_definition
+name: class_definition-slot
+
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+  skos: http://www.w3.org/2004/02/skos/core#
+
+default_prefix: hc
+
+imports:
+  - linkml:types
+
+slots:
+  class_definition:
+    slot_uri: skos:definition
+    description: |
+      Formal definition of this class.
+      Used primarily for RecordSetType classes.
+      
+      **Migrated from**: `**Definition**:` and `**DEFINITION**:` sections.
+    range: string
+    annotations:
+      source_section: "**Definition**:"
--- a/schemas/20251121/linkml/modules/slots/dutch_context.yaml
+++ b/schemas/20251121/linkml/modules/slots/dutch_context.yaml
@ -0,0 +1,23 @@
+id: https://nde.nl/ontology/hc/slot/dutch_context
+name: dutch_context-slot
+
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+
+default_prefix: hc
+
+imports:
+  - linkml:types
+
+slots:
+  dutch_context:
+    slot_uri: hc:dutchContext
+    description: |
+      Netherlands-specific context and terminology.
+      Documents Dutch heritage sector conventions, terminology, and institutional context.
+      
+      **Migrated from**: `**Dutch Context**:` sections.
+    range: string
+    annotations:
+      source_section: "**Dutch Context**:"
--- a/schemas/20251121/linkml/modules/slots/example_location.yaml
+++ b/schemas/20251121/linkml/modules/slots/example_location.yaml
@ -0,0 +1,18 @@
+id: https://nde.nl/ontology/hc/slot/example_location
+name: example_location-slot
+
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+  schema: http://schema.org/
+
+default_prefix: hc
+
+imports:
+  - linkml:types
+
+slots:
+  example_location:
+    slot_uri: schema:location
+    description: Location of the example institution (city, country)
+    range: string
--- a/schemas/20251121/linkml/modules/slots/example_name.yaml
+++ b/schemas/20251121/linkml/modules/slots/example_name.yaml
@ -0,0 +1,19 @@
+id: https://nde.nl/ontology/hc/slot/example_name
+name: example_name-slot
+
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+  schema: http://schema.org/
+
+default_prefix: hc
+
+imports:
+  - linkml:types
+
+slots:
+  example_name:
+    slot_uri: schema:name
+    description: Name of the example institution
+    range: string
+    required: true
--- a/schemas/20251121/linkml/modules/slots/example_note.yaml
+++ b/schemas/20251121/linkml/modules/slots/example_note.yaml
@ -0,0 +1,18 @@
+id: https://nde.nl/ontology/hc/slot/example_note
+name: example_note-slot
+
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+  skos: http://www.w3.org/2004/02/skos/core#
+
+default_prefix: hc
+
+imports:
+  - linkml:types
+
+slots:
+  example_note:
+    slot_uri: skos:note
+    description: Additional note about the example
+    range: string
--- a/schemas/20251121/linkml/modules/slots/example_wikidata_id.yaml
+++ b/schemas/20251121/linkml/modules/slots/example_wikidata_id.yaml
@ -0,0 +1,18 @@
+id: https://nde.nl/ontology/hc/slot/example_wikidata_id
+name: example_wikidata_id-slot
+
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+
+default_prefix: hc
+
+imports:
+  - linkml:types
+
+slots:
+  example_wikidata_id:
+    slot_uri: hc:wikidataId
+    description: Wikidata Q-number for the example institution
+    range: string
+    pattern: "^Q[0-9]+$"
--- a/schemas/20251121/linkml/modules/slots/has_or_had_organizer.yaml
+++ b/schemas/20251121/linkml/modules/slots/has_or_had_organizer.yaml
@ -0,0 +1,89 @@
+# has_or_had_organizer slot
+# Generic slot for entities that organize events, exhibitions, programs, etc.
+#
+# Following RiC-O naming convention (Rule 39): "hasOrHad..." pattern
+# for temporal relationships in heritage domain.
+#
+# Generation date: 2026-01-19
+# Rule compliance: 38 (slot centralization + semantic URI), 39 (RiC-O naming), 42 (no prefix), 53 (slot_fixes.yaml)
+
+id: https://nde.nl/ontology/hc/slot/has_or_had_organizer
+name: has_or_had_organizer_slot
+title: Has Or Had Organizer Slot
+
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+  owl: http://www.w3.org/2002/07/owl#
+  schema: http://schema.org/
+  prov: http://www.w3.org/ns/prov#
+  org: http://www.w3.org/ns/org#
+
+default_prefix: hc
+
+imports:
+  - linkml:types
+
+slots:
+  has_or_had_organizer:
+    slot_uri: schema:organizer
+    description: |
+      Entity that organizes or organized an event, exhibition, program, or activity.
+      
+      **Temporal Semantics** (RiC-O Pattern):
+      The "hasOrHad" naming follows RiC-O convention indicating this relationship
+      may be historical - an event's organizers change over time or the event is completed.
+      
+      **Ontological Alignment**:
+      - **Primary** (`slot_uri`): `schema:organizer` - Schema.org organizer
+      - **Close**: `schema:contributor` - contributor to event
+      - **Related**: `prov:wasAssociatedWith` - PROV-O association
+      
+      **Usage**:
+      - Primary organizer: main institution organizing an exhibition
+      - Co-organizer: partner institutions with organizational role
+      - Sponsor-organizer: sponsors with curatorial/organizational input
+      
+      **Pattern**:
+      Uses Organizer class to capture both the organizing entity and their role.
+      This replaces simple uriorcurie references to allow role discrimination.
+      
+      **Range**: `uriorcurie` (Rule 55) - broadened for flexibility.
+      Classes narrow via slot_usage to Organizer class.
+      
+    range: uriorcurie
+    implements:
+      - owl:ObjectProperty  # Force OWL ObjectProperty to avoid ambiguous type warning
+    required: false
+    multivalued: true
+    
+    exact_mappings:
+      - schema:organizer
+    
+    close_mappings:
+      - schema:contributor
+    
+    related_mappings:
+      - prov:wasAssociatedWith
+      - org:hasMember
+    
+    annotations:
+      rico_naming_convention: |
+        Follows RiC-O "hasOrHad" pattern for temporal predicates.
+        See Rule 39: Slot Naming Convention (RiC-O Style)
+      replaces_slots: >-
+        co_organized_by, organized_by (partial - role discrimination)
+      migration_date: "2026-01-19"
+    
+    comments:
+      - "Generic organizer slot for events, exhibitions, programs"
+      - "Maps to schema:organizer as primary URI"
+      - "Range: uriorcurie (Rule 55) - allows Organizer class via slot_usage"
+      - "RiC-O naming: hasOrHad indicates potentially historical relationship"
+      - "RULE 53: Created per slot_fixes.yaml revision for co_organized_by"
+    
+    examples:
+      - value: "https://nde.nl/ontology/hc/organizer/rijksmuseum-vermeer-2023"
+        description: "Rijksmuseum as primary organizer of Vermeer exhibition"
+      - value: "https://nde.nl/ontology/hc/organizer/mauritshuis-vermeer-2023"
+        description: "Mauritshuis as co-organizer of Vermeer exhibition"
--- a/schemas/20251121/linkml/modules/slots/heritage_sector_usage.yaml
+++ b/schemas/20251121/linkml/modules/slots/heritage_sector_usage.yaml
@ -0,0 +1,23 @@
+id: https://nde.nl/ontology/hc/slot/heritage_sector_usage
+name: heritage_sector_usage-slot
+
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+
+default_prefix: hc
+
+imports:
+  - linkml:types
+
+slots:
+  heritage_sector_usage:
+    slot_uri: hc:heritageSectorUsage
+    description: |
+      How this class/technology is used in the heritage sector.
+      Documents adoption patterns, best practices, and sector conventions.
+      
+      **Migrated from**: `**Heritage Sector Usage**:` and `**Heritage use cases**:` sections.
+    range: string
+    annotations:
+      source_section: "**Heritage Sector Usage**:"
--- a/schemas/20251121/linkml/modules/slots/historical_significance.yaml
+++ b/schemas/20251121/linkml/modules/slots/historical_significance.yaml
@ -0,0 +1,23 @@
+id: https://nde.nl/ontology/hc/slot/historical_significance
+name: historical_significance-slot
+
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+
+default_prefix: hc
+
+imports:
+  - linkml:types
+
+slots:
+  historical_significance:
+    slot_uri: hc:historicalSignificance
+    description: |
+      Historical importance and context of this type of institution.
+      Documents the heritage value and historical role.
+      
+      **Migrated from**: `**Historical Significance**:` sections.
+    range: string
+    annotations:
+      source_section: "**Historical Significance**:"
--- a/schemas/20251121/linkml/modules/slots/is_or_was_based_on.yaml
+++ b/schemas/20251121/linkml/modules/slots/is_or_was_based_on.yaml
@ -0,0 +1,61 @@
+id: https://nde.nl/ontology/hc/slot/is_or_was_based_on
+name: is_or_was_based_on_slot
+title: Is Or Was Based On Slot
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+  prov: http://www.w3.org/ns/prov#
+  schema: http://schema.org/
+  rico: https://www.ica.org/standards/RiC/ontology#
+imports:
+  - linkml:types
+default_prefix: hc
+slots:
+  is_or_was_based_on:
+    slot_uri: prov:wasDerivedFrom
+    description: |
+      Entity or resource this item is or was based on (temporal relationship).
+      
+      **Semantic Pattern**: RiC-O temporal naming convention (Rule 39)
+      - "is_or_was" indicates the relationship may be current or historical
+      - Supports temporal modeling where dependencies change over time
+      
+      **PROV-O Alignment**:
+      prov:wasDerivedFrom - "A derivation is a transformation of an entity into another"
+      
+      **Use Cases**:
+      1. **CMS Detection**: Platform is_or_was_based_on a detected CMS
+      2. **Software Dependencies**: Application based on framework/library
+      3. **Content Derivation**: Document based on template/source
+      4. **Infrastructure**: Service based on platform/technology
+      
+      **Temporal Semantics**:
+      - Current: "This platform IS based on WordPress 6.4"
+      - Historical: "This platform WAS based on Drupal 7 (now migrated)"
+      - Use temporal_extent for precise validity periods
+      
+      **Examples**:
+      ```yaml
+      AuxiliaryDigitalPlatform:
+        platform_name: Museum Blog
+        is_or_was_based_on:
+          cms_name: WordPress
+          cms_version: "6.4"
+          detected_at: "2026-01-19T12:00:00Z"
+      ```
+      
+      **Migration Note**: Created 2026-01-19 per slot_fixes.yaml (Rule 53).
+      Replaces boolean cms_detected with structured CMS reference.
+    range: string
+    multivalued: true
+    inlined_as_list: true
+    exact_mappings:
+      - prov:wasDerivedFrom
+    close_mappings:
+      - schema:isBasedOn
+      - rico:isOrWasBasedOn
+    annotations:
+      custodian_types: '["*"]'
+      custodian_types_rationale: Universal relationship for any entity based on another
+      specificity_score: 0.25
+      specificity_rationale: Broadly applicable derivation/dependency relationship
--- a/schemas/20251121/linkml/modules/slots/key_distinction.yaml
+++ b/schemas/20251121/linkml/modules/slots/key_distinction.yaml
@ -0,0 +1,24 @@
+id: https://nde.nl/ontology/hc/slot/key_distinction
+name: key_distinction-slot
+
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+  skos: http://www.w3.org/2004/02/skos/core#
+
+default_prefix: hc
+
+imports:
+  - linkml:types
+
+slots:
+  key_distinction:
+    slot_uri: skos:note
+    description: |
+      The primary distinguishing characteristic of this class.
+      What sets it apart from similar or related types.
+      
+      **Migrated from**: `**Key Distinction**:` and `**Key Distinctions from Other Types**:` sections.
+    range: string
+    annotations:
+      source_section: "**Key Distinction**:"
--- a/schemas/20251121/linkml/modules/slots/manifest.json
+++ b/schemas/20251121/linkml/modules/slots/manifest.json
@ -77,15 +77,8 @@
        "based_on_claim.yaml",
        "classifies_or_classified.yaml",
        "closed_space_id.yaml",
-        "cms_category.yaml",
-        "cms_detected.yaml",
        "cms_id.yaml",
        "cms_product_name.yaml",
-        "cms_product_version.yaml",
-        "co_funding_required.yaml",
-        "co_organized_by.yaml",
-        "collection_access.yaml",
-        "collection_date.yaml",
        "collection_description.yaml",
        "collection_discovery_score.yaml",
        "collection_focus.yaml",
@ -860,6 +853,7 @@
        "has_or_had_operate.yaml",
        "has_or_had_operates_platform_type.yaml",
        "has_or_had_operates_storage_type.yaml",
+        "has_or_had_organizer.yaml",
        "has_or_had_organizational_change_event.yaml",
        "has_or_had_organizational_structure.yaml",
        "has_or_had_owner.yaml",
@ -1112,6 +1106,7 @@
        "is_or_was_asserted_by.yaml",
        "is_or_was_associated_with.yaml",
        "is_or_was_available.yaml",
+        "is_or_was_based_on.yaml",
        "is_or_was_categorized_as.yaml",
        "is_or_was_collection_of.yaml",
        "is_or_was_created_through.yaml",
@ -1407,6 +1402,7 @@
        "oclc_number.yaml",
        "offered_by.yaml",
        "offers_donation_scheme.yaml",
+        "offers_or_offered_access.yaml",
        "official_institution_subtype.yaml",
        "online_shop.yaml",
        "open_source.yaml",
@ -1934,6 +1930,7 @@
        "track_id.yaml",
        "uses_or_used_technique.yaml",
        "was_archived_at.yaml",
+        "was_acquired_through.yaml",
        "was_derived_from.yaml",
        "was_generated_by.yaml",
        "was_last_updated_at.yaml",
--- a/schemas/20251121/linkml/modules/slots/notable_examples.yaml
+++ b/schemas/20251121/linkml/modules/slots/notable_examples.yaml
@ -0,0 +1,29 @@
+id: https://nde.nl/ontology/hc/slot/notable_examples
+name: notable_examples-slot
+
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+  skos: http://www.w3.org/2004/02/skos/core#
+
+default_prefix: hc
+
+imports:
+  - linkml:types
+  - ../classes/NotableExample
+
+slots:
+  notable_examples:
+    slot_uri: skos:example
+    description: |
+      Real-world examples of institutions of this type.
+      Provides concrete instances for understanding the class.
+      
+      **Migrated from**: `**Notable Examples**:` sections.
+      
+      **Format**: List of NotableExample objects with name, location, and optional Wikidata ID.
+    range: NotableExample
+    multivalued: true
+    inlined_as_list: true
+    annotations:
+      source_section: "**Notable Examples**:"
--- a/schemas/20251121/linkml/modules/slots/offers_or_offered_access.yaml
+++ b/schemas/20251121/linkml/modules/slots/offers_or_offered_access.yaml
@ -0,0 +1,88 @@
+# offers_or_offered_access slot
+# Generic slot for access offerings by heritage institutions
+#
+# Following RiC-O naming convention (Rule 39): "offersOrOffered..." pattern
+# for temporal relationships in heritage domain.
+#
+# Generation date: 2026-01-19
+# Rule compliance: 38 (slot centralization + semantic URI), 39 (RiC-O naming), 42 (no prefix), 53 (slot_fixes.yaml)
+
+id: https://nde.nl/ontology/hc/slot/offers_or_offered_access
+name: offers_or_offered_access_slot
+title: Offers Or Offered Access Slot
+
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+  owl: http://www.w3.org/2002/07/owl#
+  schema: http://schema.org/
+  dcterms: http://purl.org/dc/terms/
+
+default_prefix: hc
+
+imports:
+  - linkml:types
+
+slots:
+  offers_or_offered_access:
+    slot_uri: schema:publicAccess
+    description: |
+      Access offerings provided by a heritage institution or collection.
+      
+      **Temporal Semantics** (RiC-O Pattern):
+      The "offersOrOffered" naming follows RiC-O convention indicating this relationship
+      may be historical - access conditions change over time.
+      
+      **Ontological Alignment**:
+      - **Primary** (`slot_uri`): `schema:publicAccess` - Schema.org public access flag
+      - **Close**: `dcterms:accessRights` - Dublin Core access rights
+      - **Related**: `schema:isAccessibleForFree` - accessibility information
+      
+      **Usage**:
+      - Collection access: Policies for accessing heritage collections
+      - Research access: Conditions for scholarly research use
+      - Public access: General public visiting policies
+      - Digital access: Online collection availability
+      
+      **Pattern**:
+      Uses Access class to capture structured access information including
+      access types, conditions, restrictions, and temporal applicability.
+      
+      **Range**: `uriorcurie` (Rule 55) - broadened for flexibility.
+      Classes narrow via slot_usage to Access class.
+      
+    range: uriorcurie
+    implements:
+      - owl:ObjectProperty  # Force OWL ObjectProperty to avoid ambiguous type warning
+    required: false
+    multivalued: true
+    
+    exact_mappings:
+      - schema:publicAccess
+    
+    close_mappings:
+      - dcterms:accessRights
+    
+    related_mappings:
+      - schema:isAccessibleForFree
+    
+    annotations:
+      rico_naming_convention: |
+        Follows RiC-O "offersOrOffered" pattern for temporal predicates.
+        See Rule 39: Slot Naming Convention (RiC-O Style)
+      replaces_slots: >-
+        collection_access
+      migration_date: "2026-01-19"
+    
+    comments:
+      - "Generic access slot for collections, services, facilities"
+      - "Maps to schema:publicAccess as primary URI"
+      - "Range: uriorcurie (Rule 55) - allows Access class via slot_usage"
+      - "RiC-O naming: offersOrOffered indicates potentially historical relationship"
+      - "RULE 53: Created per slot_fixes.yaml revision for collection_access"
+    
+    examples:
+      - value: "https://nde.nl/ontology/hc/access/public-by-appointment"
+        description: "Public access by appointment"
+      - value: "https://nde.nl/ontology/hc/access/academic-community-only"
+        description: "Access restricted to academic community"
--- a/schemas/20251121/linkml/modules/slots/purpose.yaml
+++ b/schemas/20251121/linkml/modules/slots/purpose.yaml
@ -1,19 +1,29 @@
 id: https://nde.nl/ontology/hc/slot/purpose
-name: purpose_slot
-title: Purpose Slot
+name: purpose-slot
+
 prefixes:
  linkml: https://w3id.org/linkml/
  hc: https://nde.nl/ontology/hc/
+  schema: http://schema.org/
+
+default_prefix: hc
+
 imports:
  - linkml:types
-default_prefix: hc
+
 slots:
  purpose:
-    description: 'Purpose and use case for this IoT device/network.
-
-
-      Dublin Core: description for purpose statement.
-
-      '
+    slot_uri: schema:description
+    description: |
+      Primary purpose and function of this class or entity.
+      Documents the main reason this type or instance exists.
+      
+      **Migrated from**: `**Purpose**:` and `**PURPOSE**:` sections in description text.
+      
+      **Use cases**:
+      - Purpose of heritage institution types
+      - Purpose of IoT devices/networks
+      - Purpose of technical systems
    range: string
-    slot_uri: hc:purpose
+    annotations:
+      source_section: "**Purpose**:"
--- a/schemas/20251121/linkml/modules/slots/related_type_name.yaml
+++ b/schemas/20251121/linkml/modules/slots/related_type_name.yaml
@ -0,0 +1,19 @@
+id: https://nde.nl/ontology/hc/slot/related_type_name
+name: related_type_name-slot
+
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+  schema: http://schema.org/
+
+default_prefix: hc
+
+imports:
+  - linkml:types
+
+slots:
+  related_type_name:
+    slot_uri: schema:name
+    description: Name of the related class
+    range: string
+    required: true
--- a/schemas/20251121/linkml/modules/slots/related_type_note.yaml
+++ b/schemas/20251121/linkml/modules/slots/related_type_note.yaml
@ -0,0 +1,18 @@
+id: https://nde.nl/ontology/hc/slot/related_type_note
+name: related_type_note-slot
+
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+  dcterms: http://purl.org/dc/terms/
+
+default_prefix: hc
+
+imports:
+  - linkml:types
+
+slots:
+  related_type_note:
+    slot_uri: dcterms:description
+    description: Explanation of how this type relates
+    range: string
--- a/schemas/20251121/linkml/modules/slots/related_type_relationship.yaml
+++ b/schemas/20251121/linkml/modules/slots/related_type_relationship.yaml
@ -0,0 +1,19 @@
+id: https://nde.nl/ontology/hc/slot/related_type_relationship
+name: related_type_relationship-slot
+
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+  skos: http://www.w3.org/2004/02/skos/core#
+
+default_prefix: hc
+
+imports:
+  - linkml:types
+
+slots:
+  related_type_relationship:
+    slot_uri: skos:note
+    description: |
+      Nature of the relationship (e.g., "broader", "narrower", "related", "contrast")
+    range: string
--- a/schemas/20251121/linkml/modules/slots/related_type_wikidata.yaml
+++ b/schemas/20251121/linkml/modules/slots/related_type_wikidata.yaml
@ -0,0 +1,18 @@
+id: https://nde.nl/ontology/hc/slot/related_type_wikidata
+name: related_type_wikidata-slot
+
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+
+default_prefix: hc
+
+imports:
+  - linkml:types
+
+slots:
+  related_type_wikidata:
+    slot_uri: hc:wikidataId
+    description: Wikidata Q-number for the related type
+    range: string
+    pattern: "^Q[0-9]+$"
--- a/schemas/20251121/linkml/modules/slots/related_types.yaml
+++ b/schemas/20251121/linkml/modules/slots/related_types.yaml
@ -0,0 +1,27 @@
+id: https://nde.nl/ontology/hc/slot/related_types
+name: related_types-slot
+
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+  skos: http://www.w3.org/2004/02/skos/core#
+
+default_prefix: hc
+
+imports:
+  - linkml:types
+  - ../classes/RelatedType
+
+slots:
+  related_types:
+    slot_uri: skos:related
+    description: |
+      Related heritage institution types with context.
+      Documents associations with other classes in the ontology.
+      
+      **Migrated from**: `**Related Types**:` sections.
+    range: RelatedType
+    multivalued: true
+    inlined_as_list: true
+    annotations:
+      source_section: "**Related Types**:"
--- a/schemas/20251121/linkml/modules/slots/research_value.yaml
+++ b/schemas/20251121/linkml/modules/slots/research_value.yaml
@ -0,0 +1,23 @@
+id: https://nde.nl/ontology/hc/slot/research_value
+name: research_value-slot
+
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+
+default_prefix: hc
+
+imports:
+  - linkml:types
+
+slots:
+  research_value:
+    slot_uri: hc:researchValue
+    description: |
+      Research and scholarly value of this type of institution or collection.
+      Documents what types of research this class supports.
+      
+      **Migrated from**: `**Research Value**:` sections.
+    range: string
+    annotations:
+      source_section: "**Research Value**:"
--- a/schemas/20251121/linkml/modules/slots/scope_description.yaml
+++ b/schemas/20251121/linkml/modules/slots/scope_description.yaml
@ -0,0 +1,29 @@
+id: https://nde.nl/ontology/hc/slot/scope_description
+name: scope_description-slot
+
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+  rico: https://www.ica.org/standards/RiC/ontology#
+
+default_prefix: hc
+
+imports:
+  - linkml:types
+
+slots:
+  scope_description:
+    slot_uri: rico:scopeAndContent
+    description: |
+      Detailed description of what this class encompasses.
+      Explains the boundaries and coverage of this heritage type.
+      
+      **Migrated from**: `**Scope**:` sections in description text.
+      
+      **Example content**:
+      - What types of materials/collections are included
+      - Geographic or temporal scope
+      - Organizational or institutional scope
+    range: string
+    annotations:
+      source_section: "**Scope**:"
--- a/schemas/20251121/linkml/modules/slots/slot_fixes.yaml
+++ b/schemas/20251121/linkml/modules/slots/slot_fixes.yaml
@ -9963,6 +9963,11 @@ fixes:
    type: slot
  - label: TimeSpan
    type: class
+  processed:
+    status: true
+    notes: '2026-01-19: Migrated in BiologicalObject.yaml. Created was_acquired_through.yaml slot and Acquisition.yaml class
+      (CIDOC-CRM E8 Acquisition with AcquisitionMethodEnum). Uses existing temporal_extent slot and TimeSpan class. Updated imports,
+      slots list, slot_usage with examples. Archived collection_date.yaml to archive/collection_date_archived_20260119.yaml.'
 - original_slot_id: https://nde.nl/ontology/hc/slot/collection_description
  revision:
  - label: has_or_had_description
--- a/schemas/20251121/linkml/modules/slots/temporal_dynamics.yaml
+++ b/schemas/20251121/linkml/modules/slots/temporal_dynamics.yaml
@ -0,0 +1,23 @@
+id: https://nde.nl/ontology/hc/slot/temporal_dynamics
+name: temporal_dynamics-slot
+
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+
+default_prefix: hc
+
+imports:
+  - linkml:types
+
+slots:
+  temporal_dynamics:
+    slot_uri: hc:temporalDynamics
+    description: |
+      Time-based change patterns and evolution of this type.
+      Documents how institutions of this type change over time.
+      
+      **Migrated from**: `**Temporal Dynamics**:` sections.
+    range: string
+    annotations:
+      source_section: "**Temporal Dynamics**:"
--- a/schemas/20251121/linkml/modules/slots/typical_contents.yaml
+++ b/schemas/20251121/linkml/modules/slots/typical_contents.yaml
@ -0,0 +1,26 @@
+id: https://nde.nl/ontology/hc/slot/typical_contents
+name: typical_contents-slot
+
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+  rico: https://www.ica.org/standards/RiC/ontology#
+
+default_prefix: hc
+
+imports:
+  - linkml:types
+
+slots:
+  typical_contents:
+    slot_uri: rico:hasContentOfType
+    description: |
+      Typical contents or holdings for this type of institution.
+      Lists common record types, materials, or collection types.
+      
+      **Migrated from**: `**Typical Contents**:` sections.
+    range: string
+    multivalued: true
+    inlined_as_list: true
+    annotations:
+      source_section: "**Typical Contents**:"
--- a/schemas/20251121/linkml/modules/slots/use_cases.yaml
+++ b/schemas/20251121/linkml/modules/slots/use_cases.yaml
@ -0,0 +1,26 @@
+id: https://nde.nl/ontology/hc/slot/use_cases
+name: use_cases-slot
+
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+  schema: http://schema.org/
+
+default_prefix: hc
+
+imports:
+  - linkml:types
+
+slots:
+  use_cases:
+    slot_uri: schema:usageInfo
+    description: |
+      Application scenarios and use cases for this class.
+      Documents how this type is used in practice.
+      
+      **Migrated from**: `**Use Cases**:` and `**USE CASES**:` sections.
+    range: string
+    multivalued: true
+    inlined_as_list: true
+    annotations:
+      source_section: "**Use Cases**:"
--- a/schemas/20251121/linkml/modules/slots/was_acquired_through.yaml
+++ b/schemas/20251121/linkml/modules/slots/was_acquired_through.yaml
@ -0,0 +1,54 @@
+id: https://nde.nl/ontology/hc/slot/was_acquired_through
+name: was_acquired_through_slot
+title: Was Acquired Through Slot
+# Created per slot_fixes.yaml revision for collection_date migration
+# RULE 53: Generic acquisition relationship pattern
+# RULE 39: RiC-O temporal naming convention (was_* for past events)
+
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+  crm: http://www.cidoc-crm.org/cidoc-crm/
+  rico: https://www.ica.org/standards/RiC/ontology#
+  prov: http://www.w3.org/ns/prov#
+  schema: http://schema.org/
+
+imports:
+  - linkml:types
+
+default_prefix: hc
+
+slots:
+  was_acquired_through:
+    description: >-
+      Links an object or specimen to its acquisition event, capturing how and when it was obtained.
+      
+      Acquisition encompasses various methods of obtaining items for collections:
+      - Field collection (biological/geological specimens)
+      - Purchase (art, manuscripts, artifacts)
+      - Donation/bequest (gifts, estate donations)
+      - Transfer (from other institutions)
+      - Exchange (inter-institutional specimen exchange)
+      - Excavation (archaeological contexts)
+      
+      The Acquisition class captures temporal extent via TimeSpan, allowing for uncertain dates
+      common with historical specimens (e.g., "collected sometime in the 1750s").
+      
+      **Darwin Core alignment**: For biological specimens, this replaces the simpler `dwc:eventDate`
+      with a structured acquisition event that can capture collector, location, method, and date.
+    range: Acquisition
+    slot_uri: crm:P24i_changed_ownership_through
+    multivalued: true
+    inlined: true
+    inlined_as_list: true
+    exact_mappings:
+      - crm:P24i_changed_ownership_through
+    close_mappings:
+      - rico:hasOrHadHolder
+      - prov:wasGeneratedBy
+    related_mappings:
+      - schema:acquiredFrom
+      - dwc:eventDate
+    annotations:
+      rule_53_migration: "Replaces collection_date with structured Acquisition event"
+      darwin_core_note: "For biological specimens, Acquisition.temporal_extent replaces dwc:eventDate"