feat: Add CreationEvent, DatePrecision, IdentificationEvent, and Image classes with structured slots

- Introduced CreationEvent class to represent the creation of objects, including temporal extent, creator, and place of creation. - Added DatePrecision class to indicate the precision level of date values, supporting various formats from day to century. - Implemented IdentificationEvent class for taxonomic identification, capturing identification date, method, and confidence level. - Created Image class for visual content representation, including URL and metadata for images used in collections. - Archived previous slots related to card images and titles, replacing them with structured slots for better data representation. - Enhanced slots for decommission dates, degree of certainty, and identification events to improve temporal data handling.
2026-01-23 23:15:43 +01:00 · 2026-01-23 23:15:43 +01:00 · b61572f08a
commit b61572f08a
parent 4cdf9588b2
41 changed files with 3071 additions and 121 deletions
--- a/frontend/public/schemas/20251121/linkml/manifest.json
+++ b/frontend/public/schemas/20251121/linkml/manifest.json
@ -1,5 +1,5 @@
 {
-  "generated": "2026-01-23T10:42:56.557Z",
+  "generated": "2026-01-23T12:15:15.118Z",
  "schemaRoot": "/schemas/20251121/linkml",
  "totalFiles": 3035,
  "categoryCounts": {
--- a/schemas/20251121/linkml/manifest.json
+++ b/schemas/20251121/linkml/manifest.json
@ -1,5 +1,5 @@
 {
-  "generated": "2026-01-23T12:15:15.118Z",
+  "generated": "2026-01-23T22:15:43.772Z",
  "schemaRoot": "/schemas/20251121/linkml",
  "totalFiles": 3035,
  "categoryCounts": {
--- a/schemas/20251121/linkml/modules/classes/BiologicalObject.yaml
+++ b/schemas/20251121/linkml/modules/classes/BiologicalObject.yaml
@ -47,7 +47,8 @@ imports:
  - ./NameType
  - ./NameTypes
  - ../slots/has_or_had_custodian_type
-  - ../slots/date_identified
+  - ./IdentificationEvent
+  - ../slots/is_or_was_identified_through  # was: date_identified - migrated per Rule 53 (2026-01-23)
  - ../slots/field_number
  - ../slots/gbif_id
  - ../slots/genbank_accession
@ -145,7 +146,7 @@ classes:
    # REMOVED 2026-01-22: common_name, common_name_language - migrated to has_or_had_name + Name (Rule 53)
    - has_or_had_name
    - has_or_had_custodian_type
-    - date_identified
+    - is_or_was_identified_through  # was: date_identified - migrated per Rule 53 (2026-01-23)
    - field_number
    - gbif_id
    - genbank_accession
@ -318,11 +319,21 @@ classes:
        multivalued: true
        examples:
        - value: Dr. Jane Smith
-      date_identified:
+      is_or_was_identified_through:  # was: date_identified - migrated per Rule 53 (2026-01-23)
        required: false
-        range: date
+        range: IdentificationEvent
+        inlined: true
+        description: |
+          Identification event for this specimen.
+          MIGRATED from date_identified per slot_fixes.yaml (Rule 53).
+          Uses IdentificationEvent class with temporal_extent for dates.
        examples:
-        - value: '2020-03-15'
+        - value:
+            temporal_extent:
+              begin_of_the_begin: '2020-03-15'
+            identified_by:
+              - agent_name: "Dr. Jane Smith"
+          description: "Was date_identified: 2020-03-15"
      specimen_type:
        required: false
        range: string
--- a/schemas/20251121/linkml/modules/classes/Carrier.yaml
+++ b/schemas/20251121/linkml/modules/classes/Carrier.yaml
@ -0,0 +1,95 @@
+# Carrier class
+# Physical carrier for information-bearing objects
+#
+# Created: 2026-01-23 per slot_fixes.yaml F24 (carrier_type migration)
+# Rule compliance: 0b (Type/Types pattern), 38, 39, 42, 53
+
+id: https://nde.nl/ontology/hc/class/Carrier
+name: Carrier
+title: Carrier Class
+
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+  bf: http://id.loc.gov/ontologies/bibframe/
+  rda: http://rdaregistry.info/termList/
+  crm: http://www.cidoc-crm.org/cidoc-crm/
+  dcterms: http://purl.org/dc/terms/
+
+default_prefix: hc
+
+imports:
+  - linkml:types
+  - ../metadata
+  - ../slots/has_or_had_type
+  - ../slots/has_or_had_description
+  - ../slots/has_or_had_note
+  - ./CarrierType
+
+classes:
+  Carrier:
+    class_uri: bf:Carrier
+    description: >-
+      A physical medium on which information can be recorded or stored.
+      
+      Models the physical carrier (codex, scroll, disc, etc.) as distinct
+      from the content it carries. Supports the FRBR/LRM conceptual model
+      distinction between Work/Expression/Manifestation/Item.
+      
+      **Type Classification**:
+      Use has_or_had_type with CarrierType subclasses (Rule 0b pattern):
+      - CodexCarrier, ScrollCarrier, SheetCarrier (traditional)
+      - OpticalDiscCarrier, MagneticTapeCarrier (modern media)
+      - DigitalCarrier (born-digital content)
+      
+      MIGRATED from carrier_type enum (2026-01-23) per Rule 53.
+    exact_mappings:
+      - bf:Carrier
+      - rda:Carrier
+    close_mappings:
+      - crm:E84_Information_Carrier
+    slots:
+      - has_or_had_type
+      - has_or_had_description
+      - has_or_had_note
+    slot_usage:
+      has_or_had_type:
+        description: >-
+          The type of physical carrier from the CarrierType taxonomy.
+          Use CarrierType subclasses per Rule 0b (Type/Types pattern).
+        range: CarrierType
+        required: true
+        examples:
+          - value:
+              carrier_type_code: CODEX
+              carrier_type_label: Codex
+            description: Bound volume form
+          - value:
+              carrier_type_code: VINYL_DISC
+              carrier_type_label: Vinyl Disc
+            description: Audio recording medium
+      has_or_had_description:
+        description: >-
+          Description of the physical carrier characteristics.
+          Includes material, condition, dimensions, etc.
+        range: string
+        required: false
+        examples:
+          - value: "Paper codex with leather binding, 324 leaves"
+      has_or_had_note:
+        description: Additional notes about the carrier.
+        range: string
+        required: false
+    examples:
+      - value:
+          has_or_had_type:
+            carrier_type_code: CODEX
+            carrier_type_label: Codex
+          has_or_had_description: "Paper codex, 18th-century red morocco binding"
+        description: Bound book carrier
+      - value:
+          has_or_had_type:
+            carrier_type_code: VINYL_DISC
+            carrier_type_label: Vinyl Disc
+          has_or_had_description: "12-inch 33⅓ RPM long-playing record"
+        description: Audio carrier
--- a/schemas/20251121/linkml/modules/classes/CarrierType.yaml
+++ b/schemas/20251121/linkml/modules/classes/CarrierType.yaml
@ -0,0 +1,77 @@
+# CarrierType class (abstract base)
+# Type taxonomy for physical information carriers
+#
+# Created: 2026-01-23 per slot_fixes.yaml F24 (carrier_type migration)
+# Rule compliance: 0b (Type/Types pattern - this is the Type file)
+
+id: https://nde.nl/ontology/hc/class/CarrierType
+name: CarrierType
+title: Carrier Type Class (Abstract Base)
+
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+  bf: http://id.loc.gov/ontologies/bibframe/
+  rda: http://rdaregistry.info/termList/
+  skos: http://www.w3.org/2004/02/skos/core#
+
+default_prefix: hc
+
+imports:
+  - linkml:types
+  - ../metadata
+  - ../slots/has_or_had_code
+  - ../slots/has_or_had_label
+  - ../slots/has_or_had_description
+
+classes:
+  CarrierType:
+    class_uri: bf:Carrier
+    abstract: true
+    description: >-
+      Abstract base class for carrier type taxonomy.
+      
+      **Rule 0b Compliance**: This is the abstract TYPE file.
+      Concrete carrier types are defined in CarrierTypes.yaml (plural).
+      
+      Categories of physical carriers:
+      - **Codex forms**: Bound volumes, pamphlets, notebooks
+      - **Sheet forms**: Single sheets, broadsides, maps, photographs
+      - **Scroll forms**: Rolled manuscripts, papyrus
+      - **Ancient forms**: Clay tablets, wax tablets, inscriptions
+      - **Audio carriers**: Vinyl, cassette, compact disc
+      - **Visual carriers**: Film reels, videotape, microfilm
+      - **Digital carriers**: Floppy disk, optical disc, hard drive
+      
+      MIGRATED from CarrierTypeEnum (2026-01-23) per Rule 53.
+      Enum-to-class promotion provides richer semantics and extensibility.
+    exact_mappings:
+      - bf:Carrier
+      - rda:Carrier
+    close_mappings:
+      - skos:Concept
+    slots:
+      - has_or_had_code
+      - has_or_had_label
+      - has_or_had_description
+    slot_usage:
+      has_or_had_code:
+        description: Short code for the carrier type (e.g., CODEX, SCROLL, VINYL_DISC).
+        range: string
+        required: true
+        identifier: true
+        pattern: '^[A-Z][A-Z0-9_]*$'
+      has_or_had_label:
+        description: Human-readable label for the carrier type.
+        range: string
+        required: true
+      has_or_had_description:
+        description: Definition and scope of this carrier type.
+        range: string
+        required: false
+    comments:
+      - "Abstract base class - use concrete subclasses from CarrierTypes.yaml"
+      - "Replaces CarrierTypeEnum per Rule 53 (enum-to-class promotion)"
+    see_also:
+      - https://www.loc.gov/bibframe/docs/
+      - http://www.rdaregistry.info/termList/RDACarrierType/
--- a/schemas/20251121/linkml/modules/classes/CarrierTypes.yaml
+++ b/schemas/20251121/linkml/modules/classes/CarrierTypes.yaml
@ -0,0 +1,299 @@
+# CarrierTypes class (concrete subclasses)
+# Concrete carrier type subclasses per Rule 0b (Type/Types pattern)
+#
+# Created: 2026-01-23 per slot_fixes.yaml F24 (carrier_type migration)
+# Rule compliance: 0b (Type/Types pattern - this is the Types file)
+
+id: https://nde.nl/ontology/hc/class/CarrierTypes
+name: CarrierTypes
+title: Carrier Types (Concrete Subclasses)
+
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+  bf: http://id.loc.gov/ontologies/bibframe/
+  rda: http://rdaregistry.info/termList/
+
+default_prefix: hc
+
+imports:
+  - linkml:types
+  - ../metadata
+  - ./CarrierType
+
+classes:
+  # === CODEX FORMS (Bound Volumes) ===
+  
+  CodexCarrier:
+    is_a: CarrierType
+    class_uri: hc:CodexCarrier
+    description: >-
+      A book consisting of stacked, bound leaves/pages.
+      The dominant form for Western manuscripts and printed books since antiquity.
+    slot_usage:
+      has_or_had_code:
+        equals_string: CODEX
+      has_or_had_label:
+        equals_string: Codex
+
+  BoundVolumeCarrier:
+    is_a: CarrierType
+    class_uri: hc:BoundVolumeCarrier
+    description: General bound volume, broader than codex.
+    slot_usage:
+      has_or_had_code:
+        equals_string: BOUND_VOLUME
+      has_or_had_label:
+        equals_string: Bound Volume
+
+  PamphletCarrier:
+    is_a: CarrierType
+    class_uri: hc:PamphletCarrier
+    description: Unbound or loosely bound publication, typically few pages.
+    slot_usage:
+      has_or_had_code:
+        equals_string: PAMPHLET
+      has_or_had_label:
+        equals_string: Pamphlet
+
+  NotebookCarrier:
+    is_a: CarrierType
+    class_uri: hc:NotebookCarrier
+    description: Bound blank or ruled pages for writing.
+    slot_usage:
+      has_or_had_code:
+        equals_string: NOTEBOOK
+      has_or_had_label:
+        equals_string: Notebook
+
+  # === SHEET FORMS ===
+  
+  SheetCarrier:
+    is_a: CarrierType
+    class_uri: hc:SheetCarrier
+    description: Single flat sheet, unbound.
+    slot_usage:
+      has_or_had_code:
+        equals_string: SHEET
+      has_or_had_label:
+        equals_string: Sheet
+
+  BroadsideCarrier:
+    is_a: CarrierType
+    class_uri: hc:BroadsideCarrier
+    description: Large single sheet printed on one side.
+    slot_usage:
+      has_or_had_code:
+        equals_string: BROADSIDE
+      has_or_had_label:
+        equals_string: Broadside
+
+  MapSheetCarrier:
+    is_a: CarrierType
+    class_uri: hc:MapSheetCarrier
+    description: Cartographic material on a single sheet.
+    slot_usage:
+      has_or_had_code:
+        equals_string: MAP_SHEET
+      has_or_had_label:
+        equals_string: Map Sheet
+
+  PhotographCarrier:
+    is_a: CarrierType
+    class_uri: hc:PhotographCarrier
+    description: Photographic print or negative.
+    slot_usage:
+      has_or_had_code:
+        equals_string: PHOTOGRAPH
+      has_or_had_label:
+        equals_string: Photograph
+
+  ParchmentLeafCarrier:
+    is_a: CarrierType
+    class_uri: hc:ParchmentLeafCarrier
+    description: Single parchment or vellum leaf.
+    slot_usage:
+      has_or_had_code:
+        equals_string: PARCHMENT_LEAF
+      has_or_had_label:
+        equals_string: Parchment Leaf
+
+  # === SCROLL FORMS ===
+  
+  ScrollCarrier:
+    is_a: CarrierType
+    class_uri: hc:ScrollCarrier
+    description: Rolled manuscript form.
+    slot_usage:
+      has_or_had_code:
+        equals_string: SCROLL
+      has_or_had_label:
+        equals_string: Scroll
+
+  PapyrusScrollCarrier:
+    is_a: CarrierType
+    class_uri: hc:PapyrusScrollCarrier
+    description: Scroll made from papyrus plant material.
+    slot_usage:
+      has_or_had_code:
+        equals_string: PAPYRUS_SCROLL
+      has_or_had_label:
+        equals_string: Papyrus Scroll
+
+  # === ANCIENT FORMS ===
+  
+  ClayTabletCarrier:
+    is_a: CarrierType
+    class_uri: hc:ClayTabletCarrier
+    description: Cuneiform tablet made from clay.
+    slot_usage:
+      has_or_had_code:
+        equals_string: CLAY_TABLET
+      has_or_had_label:
+        equals_string: Clay Tablet
+
+  WaxTabletCarrier:
+    is_a: CarrierType
+    class_uri: hc:WaxTabletCarrier
+    description: Wooden tablet with wax coating for writing.
+    slot_usage:
+      has_or_had_code:
+        equals_string: WAX_TABLET
+      has_or_had_label:
+        equals_string: Wax Tablet
+
+  InscriptionCarrier:
+    is_a: CarrierType
+    class_uri: hc:InscriptionCarrier
+    description: Text carved or incised into stone, metal, or other durable material.
+    slot_usage:
+      has_or_had_code:
+        equals_string: INSCRIPTION
+      has_or_had_label:
+        equals_string: Inscription
+
+  # === AUDIO CARRIERS ===
+  
+  VinylDiscCarrier:
+    is_a: CarrierType
+    class_uri: hc:VinylDiscCarrier
+    description: Analog audio recording on vinyl record.
+    slot_usage:
+      has_or_had_code:
+        equals_string: VINYL_DISC
+      has_or_had_label:
+        equals_string: Vinyl Disc
+
+  AudioCassetteCarrier:
+    is_a: CarrierType
+    class_uri: hc:AudioCassetteCarrier
+    description: Compact cassette tape for audio recording.
+    slot_usage:
+      has_or_had_code:
+        equals_string: AUDIO_CASSETTE
+      has_or_had_label:
+        equals_string: Audio Cassette
+
+  CompactDiscCarrier:
+    is_a: CarrierType
+    class_uri: hc:CompactDiscCarrier
+    description: Digital optical disc for audio (CD).
+    slot_usage:
+      has_or_had_code:
+        equals_string: COMPACT_DISC
+      has_or_had_label:
+        equals_string: Compact Disc
+
+  # === VISUAL CARRIERS ===
+  
+  FilmReelCarrier:
+    is_a: CarrierType
+    class_uri: hc:FilmReelCarrier
+    description: Motion picture film on reel.
+    slot_usage:
+      has_or_had_code:
+        equals_string: FILM_REEL
+      has_or_had_label:
+        equals_string: Film Reel
+
+  VideotapeCarrier:
+    is_a: CarrierType
+    class_uri: hc:VideotapeCarrier
+    description: Magnetic tape for video recording.
+    slot_usage:
+      has_or_had_code:
+        equals_string: VIDEOTAPE
+      has_or_had_label:
+        equals_string: Videotape
+
+  MicrofilmCarrier:
+    is_a: CarrierType
+    class_uri: hc:MicrofilmCarrier
+    description: Microform on film for preservation/access.
+    slot_usage:
+      has_or_had_code:
+        equals_string: MICROFILM
+      has_or_had_label:
+        equals_string: Microfilm
+
+  MicroficheCarrier:
+    is_a: CarrierType
+    class_uri: hc:MicroficheCarrier
+    description: Flat microform sheet.
+    slot_usage:
+      has_or_had_code:
+        equals_string: MICROFICHE
+      has_or_had_label:
+        equals_string: Microfiche
+
+  # === DIGITAL CARRIERS ===
+  
+  FloppyDiskCarrier:
+    is_a: CarrierType
+    class_uri: hc:FloppyDiskCarrier
+    description: Magnetic floppy disk storage medium.
+    slot_usage:
+      has_or_had_code:
+        equals_string: FLOPPY_DISK
+      has_or_had_label:
+        equals_string: Floppy Disk
+
+  OpticalDiscCarrier:
+    is_a: CarrierType
+    class_uri: hc:OpticalDiscCarrier
+    description: Optical storage disc (CD-ROM, DVD, Blu-ray).
+    slot_usage:
+      has_or_had_code:
+        equals_string: OPTICAL_DISC
+      has_or_had_label:
+        equals_string: Optical Disc
+
+  HardDriveCarrier:
+    is_a: CarrierType
+    class_uri: hc:HardDriveCarrier
+    description: Magnetic or solid-state hard drive.
+    slot_usage:
+      has_or_had_code:
+        equals_string: HARD_DRIVE
+      has_or_had_label:
+        equals_string: Hard Drive
+
+  USBDriveCarrier:
+    is_a: CarrierType
+    class_uri: hc:USBDriveCarrier
+    description: USB flash drive storage medium.
+    slot_usage:
+      has_or_had_code:
+        equals_string: USB_DRIVE
+      has_or_had_label:
+        equals_string: USB Drive
+
+  MemoryCardCarrier:
+    is_a: CarrierType
+    class_uri: hc:MemoryCardCarrier
+    description: Flash memory card (SD, CompactFlash, etc.).
+    slot_usage:
+      has_or_had_code:
+        equals_string: MEMORY_CARD
+      has_or_had_label:
+        equals_string: Memory Card
--- a/schemas/20251121/linkml/modules/classes/Content.yaml
+++ b/schemas/20251121/linkml/modules/classes/Content.yaml
@ -3,7 +3,8 @@
 #
 # Created: 2026-01-16
 # Migration: temporal_coverage slot → has_or_had_content + Content (Rule 53/56)
-# Rule compliance: 38, 39, 53
+# Updated: 2026-01-23 - Added has_or_had_type for ContentType per F25 migration
+# Rule compliance: 0b, 38, 39, 53

 id: https://nde.nl/ontology/hc/class/Content
 name: Content
@ -25,8 +26,11 @@ imports:
  - ../metadata
  - ../slots/has_or_had_label
  - ../slots/has_or_had_description
+  - ../slots/has_or_had_type
  - ../slots/temporal_extent
  - ./TimeSpan
+  - ./ContentType
+  - ./ContentTypes

 classes:
  Content:
@ -62,11 +66,30 @@ classes:
      - has_or_had_description: "Shipping manifests, correspondence, and financial records..."
      
      **Migrated From**: temporal_coverage slot (2026-01-16) per Rule 53/56
+      
+      **Updated 2026-01-23**: Added has_or_had_type for ContentType per F25 migration
    slots:
      - has_or_had_label
      - has_or_had_description
+      - has_or_had_type
      - temporal_extent
    slot_usage:
+      has_or_had_type:
+        description: >-
+          The type of intellectual content from ContentType taxonomy.
+          Uses ContentType subclasses per Rule 0b (Type/Types pattern).
+          Added 2026-01-23 per F25 migration.
+        range: ContentType
+        required: false
+        examples:
+          - value:
+              has_or_had_code: RELIGIOUS
+              has_or_had_label: Religious Content
+            description: Religious text content
+          - value:
+              has_or_had_code: CARTOGRAPHIC
+              has_or_had_label: Cartographic Content
+            description: Maps and geographic content
      has_or_had_label:
        description: Label or title for the content scope
        examples:
--- a/schemas/20251121/linkml/modules/classes/ContentType.yaml
+++ b/schemas/20251121/linkml/modules/classes/ContentType.yaml
@ -0,0 +1,73 @@
+# ContentType class (abstract base)
+# Type taxonomy for intellectual content carried by information carriers
+#
+# Created: 2026-01-23 per slot_fixes.yaml F25 (carries_information migration)
+# Rule compliance: 0b (Type/Types pattern - this is the Type file)
+
+id: https://nde.nl/ontology/hc/class/ContentType
+name: ContentType
+title: Content Type Class (Abstract Base)
+
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+  crm: http://www.cidoc-crm.org/cidoc-crm/
+  dcterms: http://purl.org/dc/terms/
+  skos: http://www.w3.org/2004/02/skos/core#
+
+default_prefix: hc
+
+imports:
+  - linkml:types
+  - ../metadata
+  - ../slots/has_or_had_code
+  - ../slots/has_or_had_label
+  - ../slots/has_or_had_description
+
+classes:
+  ContentType:
+    class_uri: crm:E55_Type
+    abstract: true
+    description: >-
+      Abstract base class for content type taxonomy.
+      
+      **Rule 0b Compliance**: This is the abstract TYPE file.
+      Concrete content types are defined in ContentTypes.yaml (plural).
+      
+      Categories of intellectual content:
+      - **Textual**: Books, articles, manuscripts, documents
+      - **Visual**: Images, photographs, drawings, maps
+      - **Audio**: Music, speech recordings, oral histories
+      - **Audiovisual**: Films, videos, multimedia
+      - **Data**: Datasets, databases, structured information
+      - **Mixed**: Combinations of above categories
+      
+      CIDOC-CRM Alignment: E55_Type as a controlled vocabulary for content types.
+    exact_mappings:
+      - crm:E55_Type
+    close_mappings:
+      - dcterms:type
+      - skos:Concept
+    slots:
+      - has_or_had_code
+      - has_or_had_label
+      - has_or_had_description
+    slot_usage:
+      has_or_had_code:
+        description: Short code for the content type.
+        range: string
+        required: true
+        identifier: true
+        pattern: '^[A-Z][A-Z0-9_]*$'
+      has_or_had_label:
+        description: Human-readable label for the content type.
+        range: string
+        required: true
+      has_or_had_description:
+        description: Definition and scope of this content type.
+        range: string
+        required: false
+    comments:
+      - "Abstract base class - use concrete subclasses from ContentTypes.yaml"
+    see_also:
+      - https://www.cidoc-crm.org/html/cidoc_crm_v7.1.3.html#E55
--- a/schemas/20251121/linkml/modules/classes/ContentTypes.yaml
+++ b/schemas/20251121/linkml/modules/classes/ContentTypes.yaml
@ -0,0 +1,243 @@
+# ContentTypes class (concrete subclasses)
+# Concrete content type subclasses per Rule 0b (Type/Types pattern)
+#
+# Created: 2026-01-23 per slot_fixes.yaml F25 (carries_information migration)
+# Rule compliance: 0b (Type/Types pattern - this is the Types file)
+
+id: https://nde.nl/ontology/hc/class/ContentTypes
+name: ContentTypes
+title: Content Types (Concrete Subclasses)
+
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+
+default_prefix: hc
+
+imports:
+  - linkml:types
+  - ../metadata
+  - ./ContentType
+
+classes:
+  # === TEXTUAL CONTENT ===
+  
+  TextualContent:
+    is_a: ContentType
+    class_uri: hc:TextualContent
+    description: Written or printed textual information.
+    slot_usage:
+      has_or_had_code:
+        equals_string: TEXTUAL
+      has_or_had_label:
+        equals_string: Textual Content
+
+  LiteraryContent:
+    is_a: ContentType
+    class_uri: hc:LiteraryContent
+    description: Literary works including novels, poetry, drama.
+    slot_usage:
+      has_or_had_code:
+        equals_string: LITERARY
+      has_or_had_label:
+        equals_string: Literary Content
+
+  ScientificContent:
+    is_a: ContentType
+    class_uri: hc:ScientificContent
+    description: Scientific and technical publications.
+    slot_usage:
+      has_or_had_code:
+        equals_string: SCIENTIFIC
+      has_or_had_label:
+        equals_string: Scientific Content
+
+  ReligiousContent:
+    is_a: ContentType
+    class_uri: hc:ReligiousContent
+    description: Religious texts, scriptures, liturgical works.
+    slot_usage:
+      has_or_had_code:
+        equals_string: RELIGIOUS
+      has_or_had_label:
+        equals_string: Religious Content
+
+  LegalContent:
+    is_a: ContentType
+    class_uri: hc:LegalContent
+    description: Legal documents, laws, contracts, court records.
+    slot_usage:
+      has_or_had_code:
+        equals_string: LEGAL
+      has_or_had_label:
+        equals_string: Legal Content
+
+  AdministrativeContent:
+    is_a: ContentType
+    class_uri: hc:AdministrativeContent
+    description: Administrative and governmental records.
+    slot_usage:
+      has_or_had_code:
+        equals_string: ADMINISTRATIVE
+      has_or_had_label:
+        equals_string: Administrative Content
+
+  CorrespondenceContent:
+    is_a: ContentType
+    class_uri: hc:CorrespondenceContent
+    description: Letters, emails, and other correspondence.
+    slot_usage:
+      has_or_had_code:
+        equals_string: CORRESPONDENCE
+      has_or_had_label:
+        equals_string: Correspondence
+
+  # === VISUAL CONTENT ===
+  
+  VisualContent:
+    is_a: ContentType
+    class_uri: hc:VisualContent
+    description: Visual information including images and graphics.
+    slot_usage:
+      has_or_had_code:
+        equals_string: VISUAL
+      has_or_had_label:
+        equals_string: Visual Content
+
+  PhotographicContent:
+    is_a: ContentType
+    class_uri: hc:PhotographicContent
+    description: Photographs and photographic reproductions.
+    slot_usage:
+      has_or_had_code:
+        equals_string: PHOTOGRAPHIC
+      has_or_had_label:
+        equals_string: Photographic Content
+
+  CartographicContent:
+    is_a: ContentType
+    class_uri: hc:CartographicContent
+    description: Maps, atlases, geographic visualizations.
+    slot_usage:
+      has_or_had_code:
+        equals_string: CARTOGRAPHIC
+      has_or_had_label:
+        equals_string: Cartographic Content
+
+  ArtisticContent:
+    is_a: ContentType
+    class_uri: hc:ArtisticContent
+    description: Artistic works including drawings, prints, paintings.
+    slot_usage:
+      has_or_had_code:
+        equals_string: ARTISTIC
+      has_or_had_label:
+        equals_string: Artistic Content
+
+  # === AUDIO CONTENT ===
+  
+  AudioContent:
+    is_a: ContentType
+    class_uri: hc:AudioContent
+    description: Sound recordings of any type.
+    slot_usage:
+      has_or_had_code:
+        equals_string: AUDIO
+      has_or_had_label:
+        equals_string: Audio Content
+
+  MusicContent:
+    is_a: ContentType
+    class_uri: hc:MusicContent
+    description: Musical recordings and compositions.
+    slot_usage:
+      has_or_had_code:
+        equals_string: MUSIC
+      has_or_had_label:
+        equals_string: Music Content
+
+  SpokenWordContent:
+    is_a: ContentType
+    class_uri: hc:SpokenWordContent
+    description: Spoken word recordings, speeches, oral histories.
+    slot_usage:
+      has_or_had_code:
+        equals_string: SPOKEN_WORD
+      has_or_had_label:
+        equals_string: Spoken Word Content
+
+  # === AUDIOVISUAL CONTENT ===
+  
+  AudiovisualContent:
+    is_a: ContentType
+    class_uri: hc:AudiovisualContent
+    description: Combined audio and visual media.
+    slot_usage:
+      has_or_had_code:
+        equals_string: AUDIOVISUAL
+      has_or_had_label:
+        equals_string: Audiovisual Content
+
+  FilmContent:
+    is_a: ContentType
+    class_uri: hc:FilmContent
+    description: Motion picture films.
+    slot_usage:
+      has_or_had_code:
+        equals_string: FILM
+      has_or_had_label:
+        equals_string: Film Content
+
+  VideoContent:
+    is_a: ContentType
+    class_uri: hc:VideoContent
+    description: Video recordings.
+    slot_usage:
+      has_or_had_code:
+        equals_string: VIDEO
+      has_or_had_label:
+        equals_string: Video Content
+
+  # === DATA CONTENT ===
+  
+  DataContent:
+    is_a: ContentType
+    class_uri: hc:DataContent
+    description: Structured data and datasets.
+    slot_usage:
+      has_or_had_code:
+        equals_string: DATA
+      has_or_had_label:
+        equals_string: Data Content
+
+  StatisticalContent:
+    is_a: ContentType
+    class_uri: hc:StatisticalContent
+    description: Statistical data and analyses.
+    slot_usage:
+      has_or_had_code:
+        equals_string: STATISTICAL
+      has_or_had_label:
+        equals_string: Statistical Content
+
+  # === MIXED/OTHER ===
+  
+  MixedContent:
+    is_a: ContentType
+    class_uri: hc:MixedContent
+    description: Combination of multiple content types.
+    slot_usage:
+      has_or_had_code:
+        equals_string: MIXED
+      has_or_had_label:
+        equals_string: Mixed Content
+
+  MultimediaContent:
+    is_a: ContentType
+    class_uri: hc:MultimediaContent
+    description: Interactive multimedia combining multiple formats.
+    slot_usage:
+      has_or_had_code:
+        equals_string: MULTIMEDIA
+      has_or_had_label:
+        equals_string: Multimedia Content
--- a/schemas/20251121/linkml/modules/classes/CreationEvent.yaml
+++ b/schemas/20251121/linkml/modules/classes/CreationEvent.yaml
@ -0,0 +1,143 @@
+# CreationEvent - Event representing the creation of an object or work
+#
+# Created per slot_fixes.yaml migration for: date_created
+# Creation date: 2026-01-23
+# Rule compliance: 39 (RiC-O naming), 50 (ontology mapping), 53 (generic slot reuse)
+
+id: https://nde.nl/ontology/hc/class/CreationEvent
+name: creation_event
+title: Creation Event
+
+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/
+
+default_prefix: hc
+
+imports:
+  - linkml:types
+  - ./TimeSpan
+  - ./Agent
+  - ../slots/temporal_extent
+  - ../slots/has_or_had_description
+  - ../slots/has_or_had_place
+
+classes:
+  CreationEvent:
+    class_uri: crm:E65_Creation
+    description: |
+      Event representing the creation of an object, work, or artifact.
+      
+      **DEFINITION**:
+      CreationEvent models the act of bringing an object into existence,
+      capturing when, where, and by whom it was created.
+      
+      **ONTOLOGY ALIGNMENT**:
+      - **Primary** (`class_uri`): `crm:E65_Creation` - CIDOC-CRM creation event
+      - **Close**: `prov:Activity` - PROV-O activity
+      - **Close**: `schema:CreateAction` - Schema.org create action
+      
+      **USAGE**:
+      Replaces simple `date_created` strings with structured event data:
+      - Temporal extent (including approximate dates like "c. 1665")
+      - Creator/artist information
+      - Place of creation
+      - Creation circumstances
+      
+      **Example**:
+      ```yaml
+      is_or_was_created_through:
+        temporal_extent:
+          begin_of_the_begin: "1665-01-01"
+          end_of_the_end: "1665-12-31"
+          display_date: "c. 1665"
+        has_or_had_creator:
+          - agent_name: "Johannes Vermeer"
+            agent_role: "artist"
+        has_or_had_place:
+          place_name: "Delft"
+          country: "NL"
+      ```
+      
+    close_mappings:
+      - prov:Activity
+      - schema:CreateAction
+    
+    slots:
+      - temporal_extent
+      - has_or_had_description
+      - has_or_had_place
+      - has_or_had_creator
+      - creation_method
+      - display_date
+    
+    slot_usage:
+      temporal_extent:
+        range: TimeSpan
+        inlined: true
+        description: |
+          When the creation occurred, using CIDOC-CRM TimeSpan.
+          Supports fuzzy/approximate dates via display_date.
+        examples:
+          - value:
+              begin_of_the_begin: "1665-01-01"
+              end_of_the_end: "1665-12-31"
+              display_date: "c. 1665"
+            description: Approximate creation date
+      has_or_had_creator:
+        range: Agent
+        multivalued: true
+        inlined_as_list: true
+        description: Person(s) or organization(s) who created the object.
+        examples:
+          - value:
+              - agent_name: "Johannes Vermeer"
+            description: Single artist
+      has_or_had_place:
+        range: Place
+        inlined: true
+        description: Location where creation occurred.
+        examples:
+          - value:
+              place_name: "Delft"
+            description: City of creation
+      display_date:
+        range: string
+        description: |
+          Human-readable date string for display purposes.
+          Preserves original date expressions like "c. 1665", "17th century",
+          "196 BCE", "1642".
+        examples:
+          - value: "c. 1665"
+            description: Circa date
+          - value: "17th century"
+            description: Century-level precision
+          - value: "196 BCE"
+            description: Historical date
+      creation_method:
+        range: string
+        description: Technique or method used in creation.
+        examples:
+          - value: "oil on canvas"
+            description: Painting technique
+    
+    attributes:
+      has_or_had_creator:
+        range: Agent
+        multivalued: true
+        inlined_as_list: true
+      display_date:
+        range: string
+        description: Human-readable date for display.
+      creation_method:
+        range: string
+        description: Technique or method of creation.
+    
+    annotations:
+      custodian_types: '["G", "M", "L", "A"]'
+      custodian_types_rationale: "Creation events primarily relevant to galleries, museums, libraries, archives with collections."
+      specificity_score: 0.70
+      specificity_rationale: "Fairly specific to collection object contexts."
--- a/schemas/20251121/linkml/modules/classes/CustodianTimelineEvent.yaml
+++ b/schemas/20251121/linkml/modules/classes/CustodianTimelineEvent.yaml
@ -28,7 +28,8 @@ imports:
  - ../slots/has_archive_path
  - ../slots/has_or_had_level  # was: data_tier - migrated per Rule 53/56/57 (2026-01-23)
  - ./DataTierLevel
-  - ../slots/date_precision
+  - ../slots/degree_of_certainty  # was: date_precision - migrated per Rule 53/56/57 (2026-01-23)
+  - ./DatePrecision
  - ../slots/description
  - ../slots/event_date
  - ../slots/event_type
@ -60,7 +61,7 @@ classes:
      \ Scope decrease (ingekrompen)\n- REORGANIZATION: Complex restructuring (herstructurering)\n\n**EXCLUDED EVENT TYPES**\n\
      \nSome patterns are NOT mapped to events:\n- predecessor: This is a relationship, not an event\n- friends_org: Separate\
      \ organization (Vrienden van...)\n- reopening: Not in OrganizationalChangeEventTypeEnum\n\n**EXAMPLE USAGE**\n\n```yaml\n\
-      timeline_events:\n  - event_type: FOUNDING\n    event_date: \"2005-04-30\"\n    date_precision: day\n    is_or_was_approximate:\n\
+      timeline_events:\n  - event_type: FOUNDING\n    event_date: \"2005-04-30\"\n    degree_of_certainty:\n      has_or_had_short_code: DAY\n    is_or_was_approximate:\n\
      \      approximation_level: EXACT\n    description: >-\n      Het RHC Drents Archief werd opgericht op 30 april 2005.\n      Het is de voortzetting\
      \ van het Rijksarchief in Drenthe (sinds 2000).\n    source_url:\n      - \"https://nl.wikipedia.org/wiki/Drents_Archief\"\
      \n      - \"https://bizzy.ai/nl/nl/52454037/regionaal-historisch-centrum-rhc-drents-archief\"\n    extraction_method:\
@ -79,7 +80,7 @@ classes:
    - is_or_was_approximate
    - archive_path
    - has_or_had_level  # was: data_tier - migrated per Rule 53/56/57 (2026-01-23)
-    - date_precision
+    - degree_of_certainty  # was: date_precision - migrated per Rule 53/56/57 (2026-01-23)
    - description
    - event_date
    - event_type
@ -95,8 +96,22 @@ classes:
        required: true
      event_date:
        required: false
-      date_precision:
+      degree_of_certainty:  # was: date_precision - migrated per Rule 53/56/57 (2026-01-23)
+        range: DatePrecision
+        inlined: true
        required: true
+        description: >-
+          Precision level of the event date.
+          Standard codes: DAY, MONTH, YEAR, DECADE, CENTURY, UNKNOWN
+        examples:
+          - value:
+              has_or_had_short_code: DAY
+              has_or_had_description: Full date with day precision
+            description: Day precision
+          - value:
+              has_or_had_short_code: YEAR
+              has_or_had_description: Year-only precision
+            description: Year precision
      # REMOVED - migrated to is_or_was_approximate (Rule 53)
      # is_approximate:
      #   required: true
@ -156,9 +171,9 @@ classes:
            value_presence: PRESENT
      postconditions:
        slot_conditions:
-          date_precision:
+          degree_of_certainty:  # was: date_precision
            value_presence: PRESENT
-        description: If event_date is provided, date_precision must be specified
+        description: If event_date is provided, degree_of_certainty (precision) must be specified
    comments:
    - 'Source-agnostic design - see Rule 37: Provenance Separation'
    - Use observation_ref to link to detailed source provenance
@ -175,7 +190,9 @@ classes:
    - value:
        event_type: FOUNDING
        event_date: '2005-04-30'
-        date_precision: day
+        degree_of_certainty:  # was: date_precision
+          has_or_had_short_code: DAY
+          has_or_had_description: Full date with day precision
        is_or_was_approximate:
          approximation_level: EXACT
        description: Het RHC Drents Archief werd opgericht op 30 april 2005.
@ -192,7 +209,9 @@ classes:
    - value:
        event_type: MERGER
        event_date: '2005'
-        date_precision: year
+        degree_of_certainty:  # was: date_precision
+          has_or_had_short_code: YEAR
+          has_or_had_description: Year-only precision
        is_or_was_approximate:
          approximation_level: EXACT
        description: In 2005 ging het Gemeentearchief Assen op in het Drents Archief.
@ -207,7 +226,9 @@ classes:
    - value:
        event_type: FOUNDING
        event_date: '1810'
-        date_precision: year
+        degree_of_certainty:  # was: date_precision
+          has_or_had_short_code: YEAR
+          has_or_had_description: Year-only precision
        is_or_was_approximate:
          approximation_level: EXACT
        description: The Rijksmuseum was founded in 1810 as the Royal Museum.
@ -223,7 +244,9 @@ classes:
    - value:
        event_type: TRANSFER
        event_date: '1885'
-        date_precision: year
+        degree_of_certainty:  # was: date_precision
+          has_or_had_short_code: YEAR
+          has_or_had_description: Year-only precision
        is_or_was_approximate:
          approximation_level: EXACT
        description: The Rijksmuseum moved to its current building designed by Cuypers.
@ -240,7 +263,9 @@ classes:
    - value:
        event_type: FOUNDING
        event_date: '1880'
-        date_precision: year
+        degree_of_certainty:  # was: date_precision
+          has_or_had_short_code: YEAR
+          has_or_had_description: Year-only precision
        is_or_was_approximate:
          approximation_level: APPROXIMATE
          has_or_had_label: "circa 1880"
--- a/schemas/20251121/linkml/modules/classes/DatePrecision.yaml
+++ b/schemas/20251121/linkml/modules/classes/DatePrecision.yaml
@ -0,0 +1,105 @@
+id: https://nde.nl/ontology/hc/class/DatePrecision
+name: date_precision_class
+title: DatePrecision Class
+description: >-
+  Represents the precision level of a date value.
+  
+  Used to indicate how specific date information is, from full day
+  precision to century-level approximations.
+
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+  crm: http://www.cidoc-crm.org/cidoc-crm/
+  time: http://www.w3.org/2006/time#
+
+imports:
+  - linkml:types
+  - ../slots/has_or_had_label
+  - ../slots/has_or_had_description
+  - ../slots/has_or_had_short_code
+
+default_prefix: hc
+
+classes:
+  DatePrecision:
+    class_uri: hc:DatePrecision
+    description: >-
+      Date precision level classification.
+      
+      **Standard Precision Levels**:
+      
+      | Level | Short Code | Format | Example |
+      |-------|------------|--------|---------|
+      | Day | DAY | YYYY-MM-DD | 2005-04-30 |
+      | Month | MONTH | YYYY-MM | 2005-04 |
+      | Year | YEAR | YYYY | 2005 |
+      | Decade | DECADE | YYYY0s | 2000s |
+      | Century | CENTURY | YYth century | 21st century |
+      | Unknown | UNKNOWN | - | Date mentioned but precision unclear |
+      
+      **CIDOC-CRM Alignment**: Related to time dimension concepts in CRM.
+      
+      **OWL Time Alignment**: Related to time:TemporalUnit for precision levels.
+    close_mappings:
+      - time:TemporalUnit
+      - crm:E52_Time-Span
+    slots:
+      - has_or_had_label
+      - has_or_had_short_code
+      - has_or_had_description
+    slot_usage:
+      has_or_had_label:
+        description: Human-readable name for the precision level.
+        range: string
+        required: true
+        examples:
+          - value: "Day"
+            description: Full date with day precision
+          - value: "Year"
+            description: Year-only precision
+      has_or_had_short_code:
+        description: >-
+          Short code identifier for the precision level.
+          Standard codes: DAY, MONTH, YEAR, DECADE, CENTURY, UNKNOWN
+        range: string
+        required: true
+        pattern: "^[A-Z]+$"
+        examples:
+          - value: "DAY"
+            description: Full date precision (YYYY-MM-DD)
+          - value: "YEAR"
+            description: Year-only precision (YYYY)
+          - value: "UNKNOWN"
+            description: Precision cannot be determined
+      has_or_had_description:
+        description: Detailed description of what this precision level means.
+        range: string
+        required: false
+        examples:
+          - value: "Full date with day precision (YYYY-MM-DD format)"
+            description: Day precision explanation
+    annotations:
+      specificity_score: 0.40
+      specificity_rationale: >-
+        Date precision is moderately specific - used primarily in
+        temporal data contexts.
+      custodian_types: '["*"]'
+      custodian_types_rationale: >-
+        Date precision applies universally to all custodian types.
+    examples:
+      - value:
+          has_or_had_label: "Day"
+          has_or_had_short_code: "DAY"
+          has_or_had_description: "Full date with day precision (YYYY-MM-DD)"
+        description: Day precision level
+      - value:
+          has_or_had_label: "Year"
+          has_or_had_short_code: "YEAR"
+          has_or_had_description: "Year-only precision (YYYY format)"
+        description: Year precision level
+      - value:
+          has_or_had_label: "Unknown"
+          has_or_had_short_code: "UNKNOWN"
+          has_or_had_description: "Date mentioned but precision cannot be determined"
+        description: Unknown precision level
--- a/schemas/20251121/linkml/modules/classes/ExhibitedObject.yaml
+++ b/schemas/20251121/linkml/modules/classes/ExhibitedObject.yaml
@ -43,7 +43,8 @@ imports:
  - ../slots/current_keeper
  - ../slots/current_location
  - ../slots/has_or_had_custodian_type
-  - ../slots/date_created
+  - ./CreationEvent
+  - ../slots/is_or_was_created_through  # was: date_created - migrated per Rule 53 (2026-01-23)
  - ../slots/dimension
  - ../slots/exhibited_in
  - ../slots/iconography
@ -135,7 +136,7 @@ classes:
    - current_keeper
    - current_location
    - has_or_had_custodian_type
-    - date_created
+    - is_or_was_created_through  # was: date_created - migrated per Rule 53 (2026-01-23)
    - dimension
    - exhibited_in
    - external_identifier
@ -219,13 +220,30 @@ classes:
        - value: Workshop of
        - value: Attributed to
        - value: Circle of
-      date_created:
+      is_or_was_created_through:  # was: date_created - migrated per Rule 53 (2026-01-23)
        required: false
-        range: string
+        range: CreationEvent
+        inlined: true
+        description: |
+          Creation event for this object, including temporal extent and creator.
+          MIGRATED from date_created per slot_fixes.yaml (Rule 53).
+          Uses CreationEvent class with TimeSpan for temporal modeling.
        examples:
-        - value: c. 1665
-        - value: '1642'
-        - value: 12th century BCE
+        - value:
+            display_date: "c. 1665"
+            temporal_extent:
+              begin_of_the_begin: "1664-01-01"
+              end_of_the_end: "1667-12-31"
+          description: "Was date_created: c. 1665"
+        - value:
+            display_date: "1642"
+            temporal_extent:
+              begin_of_the_begin: "1642-01-01"
+              end_of_the_end: "1642-12-31"
+          description: "Was date_created: 1642"
+        - value:
+            display_date: "12th century BCE"
+          description: "Was date_created: 12th century BCE"
      creation_timespan:
        required: false
        range: TimeSpan
@ -499,10 +517,11 @@ classes:
        - Johannes Vermeer
        creator_role:
        - Artist
-        date_created: c. 1665
-        creation_timespan:
-          begin_of_the_begin: '1664-01-01'
-          end_of_the_end: '1667-12-31'
+        is_or_was_created_through:  # was: date_created - migrated per Rule 53 (2026-01-23)
+          display_date: "c. 1665"
+          temporal_extent:
+            begin_of_the_begin: '1664-01-01'
+            end_of_the_end: '1667-12-31'
        creation_place:
          place_name: Delft
          country: NL
@ -543,7 +562,11 @@ classes:
        object_type: PAINTING
        creator:
        - Rembrandt van Rijn
-        date_created: '1642'
+        is_or_was_created_through:  # was: date_created - migrated per Rule 53 (2026-01-23)
+          display_date: "1642"
+          temporal_extent:
+            begin_of_the_begin: '1642-01-01'
+            end_of_the_end: '1642-12-31'
        medium: Oil on canvas
        dimensions: 363 × 437 cm
        inscription:
@ -558,7 +581,8 @@ classes:
        object_id: https://nde.nl/ontology/hc/object/british-museum-rosetta-stone
        object_name: Rosetta Stone
        object_type: ARCHAEOLOGICAL_ARTIFACT
-        date_created: 196 BCE
+        is_or_was_created_through:  # was: date_created - migrated per Rule 53 (2026-01-23)
+          display_date: "196 BCE"
        medium: Granodiorite
        dimensions: 114.4 × 72.3 × 27.9 cm, 762 kg
        current_keeper: https://nde.nl/ontology/hc/custodian/uk/british-museum
--- a/schemas/20251121/linkml/modules/classes/FindingAid.yaml
+++ b/schemas/20251121/linkml/modules/classes/FindingAid.yaml
@ -71,10 +71,13 @@ imports:
  - ../slots/is_or_was_access_restricted
  - ../slots/has_or_had_comprehensive_overview
  # REMOVED 2026-01-22: card_description, card_description_en → has_or_had_description + Description (with language tag) per slot_fixes.yaml
-  - ../slots/card_image_url
-  - ../slots/card_title
-  - ../slots/card_title_en
-  - ../slots/card_url
+  # MIGRATED 2026-01-22: card_image_url → has_or_had_image + Image per slot_fixes.yaml
+  - ../slots/has_or_had_image
+  - ./Image
+  # MIGRATED 2026-01-22: card_title, card_title_en → has_or_had_label + Label (multivalued with language) per slot_fixes.yaml
+  # NOTE: has_or_had_label already imported elsewhere in this file
+  # MIGRATED 2026-01-22: card_url → has_or_had_url + URL per slot_fixes.yaml
+  # NOTE: has_or_had_url already imported elsewhere in this file
  - ../slots/has_or_had_quantity  # was: claims_count - migrated per Rule 53 (2026-01-19)
  # REMOVED 2026-01-22: ../slots/colonial - migrated to includes_or_included + GeoSpatialPlace + is_or_was_categorized_as + ColonialStatus (Rule 53)
  - ../slots/includes_or_included
@ -1038,10 +1041,12 @@ classes:
    slots:
    # MIGRATED 2026-01-22: card_description, card_description_en → has_or_had_description + Description (multivalued with language tag)
    - has_or_had_description
-    - card_image_url
-    - card_title
-    - card_title_en
-    - card_url
+    # MIGRATED 2026-01-22: card_image_url → has_or_had_image + Image
+    - has_or_had_image
+    # MIGRATED 2026-01-22: card_title, card_title_en → has_or_had_label + Label (multivalued with language tag)
+    - has_or_had_label
+    # MIGRATED 2026-01-22: card_url → has_or_had_url + URL
+    - has_or_had_url
    - specificity_annotation
    - has_or_had_score  # was: template_specificity - migrated per Rule 53 (2026-01-17)
    - has_or_had_provenance_path  # was: xpath - migrated per Rule 53 (2026-01-15)
@ -1065,12 +1070,47 @@ classes:
              description_type: card
              language: en
            description: English card description
-      card_title:
+      has_or_had_image:
+        range: Image
+        multivalued: true
+        inlined: true
+        description: |
+          Card thumbnail/preview image(s).
+          MIGRATED 2026-01-22: Replaces card_image_url with structured Image class.
+        examples:
+          - value:
+              has_or_had_url:
+                has_or_had_value: "https://archive.org/images/card.jpg"
+              image_format: JPEG
+            description: Card thumbnail image
+      has_or_had_label:
+        range: Label
+        multivalued: true
+        inlined: true
        required: true
-      card_url:
-        range: uri
-      card_image_url:
-        range: uri
+        description: |
+          Card title(s) with language tagging.
+          MIGRATED 2026-01-22: Replaces card_title and card_title_en.
+          Use Label.language to distinguish Dutch/English titles.
+        examples:
+          - value:
+              has_or_had_text: "Kaart titel"
+              language: nl
+            description: Dutch card title
+          - value:
+              has_or_had_text: "Card title"
+              language: en
+            description: English card title
+      has_or_had_url:
+        range: URL
+        inlined: true
+        description: |
+          URL the card links to.
+          MIGRATED 2026-01-22: Replaces card_url with structured URL class.
+        examples:
+          - value:
+              has_or_had_value: "https://archive.org/page"
+            description: Card destination URL
      has_or_had_provenance_path:
        range: XPath
        inlined: true
--- a/schemas/20251121/linkml/modules/classes/IdentificationEvent.yaml
+++ b/schemas/20251121/linkml/modules/classes/IdentificationEvent.yaml
@ -0,0 +1,133 @@
+# IdentificationEvent - Event representing taxonomic/specimen identification
+#
+# Created per slot_fixes.yaml migration for: date_identified
+# Creation date: 2026-01-23
+# Rule compliance: 39 (RiC-O naming), 50 (ontology mapping), 53 (generic slot reuse)
+
+id: https://nde.nl/ontology/hc/class/IdentificationEvent
+name: identification_event
+title: Identification Event
+
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+  dwc: http://rs.tdwg.org/dwc/terms/
+  prov: http://www.w3.org/ns/prov#
+
+default_prefix: hc
+
+imports:
+  - linkml:types
+  - ./TimeSpan
+  - ./Agent
+  - ../slots/temporal_extent
+  - ../slots/has_or_had_description
+
+classes:
+  IdentificationEvent:
+    class_uri: hc:IdentificationEvent
+    description: |
+      Event representing the taxonomic or specimen identification.
+      
+      **DEFINITION**:
+      IdentificationEvent models when and by whom a biological specimen,
+      object, or artifact was identified or classified.
+      
+      **ONTOLOGY ALIGNMENT**:
+      - **Primary** (`class_uri`): `hc:IdentificationEvent` - Heritage Custodian class
+      - **Close**: `dwc:Identification` - Darwin Core identification
+      - **Close**: `prov:Activity` - PROV-O activity
+      
+      **USAGE**:
+      Replaces simple `date_identified` dates with structured event data:
+      - When the identification was made (temporal_extent)
+      - Who made the identification (identified_by)
+      - Methodology used
+      - Confidence level
+      - References consulted
+      
+      **Example**:
+      ```yaml
+      is_or_was_identified_through:
+        temporal_extent:
+          begin_of_the_begin: "2023-05-15"
+        identified_by:
+          - agent_name: "Dr. Jane Smith"
+            agent_role: "taxonomist"
+        identification_method: "Morphological analysis"
+        identification_confidence: "high"
+      ```
+      
+    close_mappings:
+      - dwc:Identification
+      - prov:Activity
+    
+    slots:
+      - temporal_extent
+      - has_or_had_description
+      - identified_by
+      - identification_method
+      - identification_confidence
+      - identification_references
+    
+    slot_usage:
+      temporal_extent:
+        range: TimeSpan
+        inlined: true
+        description: When the identification was made.
+        examples:
+          - value:
+              begin_of_the_begin: "2023-05-15"
+            description: Date of identification
+      identified_by:
+        range: Agent
+        multivalued: true
+        inlined_as_list: true
+        description: Person(s) who performed the identification.
+        examples:
+          - value:
+              - agent_name: "Dr. J. Smith"
+            description: Taxonomist
+      identification_method:
+        range: string
+        description: Method used for identification.
+        examples:
+          - value: "Morphological analysis"
+          - value: "DNA barcoding"
+          - value: "Comparison with type specimen"
+      identification_confidence:
+        range: string
+        description: Confidence level of the identification.
+        examples:
+          - value: "high"
+          - value: "medium"
+          - value: "tentative"
+      identification_references:
+        range: string
+        multivalued: true
+        description: References consulted for identification.
+        examples:
+          - value: "Flora of North America, Vol. 3"
+    
+    attributes:
+      identified_by:
+        range: Agent
+        multivalued: true
+        inlined_as_list: true
+        description: Person(s) who performed the identification.
+      identification_method:
+        range: string
+        description: Method used for identification.
+      identification_confidence:
+        range: string
+        description: Confidence level.
+      identification_references:
+        range: string
+        multivalued: true
+        description: References consulted.
+    
+    annotations:
+      custodian_types: '["M", "R", "B"]'
+      custodian_types_rationale: "Identification events primarily for natural history museums, research centers, botanical gardens."
+      specificity_score: 0.75
+      specificity_rationale: "Specific to biological/natural history collection contexts."
--- a/schemas/20251121/linkml/modules/classes/Image.yaml
+++ b/schemas/20251121/linkml/modules/classes/Image.yaml
@ -0,0 +1,98 @@
+id: https://nde.nl/ontology/hc/class/Image
+name: image_class
+title: Image Class
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+  schema: http://schema.org/
+  foaf: http://xmlns.com/foaf/0.1/
+  dcterms: http://purl.org/dc/terms/
+imports:
+  - linkml:types
+  - ../slots/has_or_had_url
+  - ./URL
+  - ../slots/has_or_had_label
+  - ./Label
+default_prefix: hc
+
+classes:
+  Image:
+    class_uri: schema:ImageObject
+    description: >-
+      Represents a visual image with URL and metadata.
+      
+      **PURPOSE**:
+      
+      Image provides structured representation for visual content including:
+      - Thumbnail images for cards/previews
+      - Collection representative images
+      - Institutional logos and branding
+      - Digital object reproductions
+      
+      **ONTOLOGY ALIGNMENT**:
+      
+      | Ontology | Mapping | Rationale |
+      |----------|---------|-----------|
+      | Schema.org | schema:ImageObject | Primary class for images |
+      | FOAF | foaf:Image | Alternative image class |
+      
+      **USE CASES**:
+      - Card preview thumbnails (card_image_url migration)
+      - Collection highlight images
+      - Object photographs
+      
+      MIGRATED 2026-01-22: Created per slot_fixes.yaml revision for card_image_url.
+    exact_mappings:
+      - schema:ImageObject
+      - foaf:Image
+    slots:
+      - has_or_had_url
+      - has_or_had_label
+    slot_usage:
+      has_or_had_url:
+        range: URL
+        required: true
+        inlined: true
+        description: >-
+          URL where the image can be accessed.
+          URL.has_or_had_value contains the actual URI.
+      has_or_had_label:
+        range: Label
+        required: false
+        inlined: true
+        description: >-
+          Alt text or caption for the image.
+          Label.has_or_had_text contains the description.
+    attributes:
+      image_format:
+        range: string
+        required: false
+        description: >-
+          Image format (e.g., "JPEG", "PNG", "WEBP", "SVG").
+      width:
+        range: integer
+        required: false
+        description: Width in pixels.
+      height:
+        range: integer
+        required: false
+        description: Height in pixels.
+    examples:
+      - value:
+          has_or_had_url:
+            has_or_had_value: "https://example.org/images/card_thumb.jpg"
+          has_or_had_label:
+            has_or_had_text: "Collection preview thumbnail"
+          image_format: JPEG
+          width: 300
+          height: 200
+        description: Card thumbnail image with metadata
+      - value:
+          has_or_had_url:
+            has_or_had_value: "https://museum.nl/logo.svg"
+          image_format: SVG
+        description: Institutional logo
+    annotations:
+      specificity_score: 0.35
+      specificity_rationale: >-
+        Images are broadly useful across heritage contexts for visual representation.
--- a/schemas/20251121/linkml/modules/classes/InformationCarrier.yaml
+++ b/schemas/20251121/linkml/modules/classes/InformationCarrier.yaml
@ -33,8 +33,16 @@ imports:
  # REMOVED 2026-01-17: call_number - migrated to has_or_had_identifier per Rule 53
  - ../slots/has_or_had_identifier  # includes call_number migration (2026-01-17)
  - ./Identifier  # for has_or_had_identifier range
-  - ../slots/carrier_type
-  - ../slots/carries_information
+  # REMOVED 2026-01-23: carrier_type - migrated to has_or_had_carrier per Rule 53/F24
+  - ../slots/has_or_had_carrier
+  - ./Carrier
+  - ./CarrierType
+  - ./CarrierTypes
+  # REMOVED 2026-01-23: carries_information - migrated to has_or_had_content per Rule 53/F25
+  - ../slots/has_or_had_content
+  - ./Content
+  - ./ContentType
+  - ./ContentTypes
  - ../slots/content_language
  - ../slots/content_summary
  - ../slots/copy_note
@ -126,8 +134,10 @@ classes:
    - includes_or_included
    # REMOVED 2026-01-17: call_number - migrated to has_or_had_identifier (Rule 53)
    - has_or_had_identifier
-    - carrier_type
-    - carries_information
+    # REMOVED 2026-01-23: carrier_type - migrated to has_or_had_carrier (Rule 53/F24)
+    - has_or_had_carrier
+    # REMOVED 2026-01-23: carries_information - migrated to has_or_had_content (Rule 53/F25)
+    - has_or_had_content
    - content_language
    - content_summary
    - copy_note
@ -164,13 +174,31 @@ classes:
    - has_or_had_label  # was: uniform_title
    - has_or_had_writing_system
    slot_usage:
-      carrier_type:
+      # REMOVED 2026-01-23: carrier_type - migrated to has_or_had_carrier (Rule 53/F24)
+      has_or_had_carrier:
        required: true
-        range: CarrierTypeEnum
+        range: Carrier
+        inlined: true
+        description: >-
+          The physical carrier type and characteristics.
+          MIGRATED from carrier_type (2026-01-23) per Rule 53/F24.
+          Uses Carrier class with CarrierType taxonomy per Rule 0b.
        examples:
-        - value: CODEX
-        - value: SCROLL
-        - value: VINYL_DISC
+        - value:
+            has_or_had_type:
+              has_or_had_code: CODEX
+              has_or_had_label: Codex
+          description: Bound volume (codex form)
+        - value:
+            has_or_had_type:
+              has_or_had_code: SCROLL
+              has_or_had_label: Scroll
+          description: Rolled manuscript
+        - value:
+            has_or_had_type:
+              has_or_had_code: VINYL_DISC
+              has_or_had_label: Vinyl Disc
+          description: Audio recording
      material_composition:
        required: false
        range: string
@ -485,12 +513,28 @@ classes:
        examples:
        - value: ITEM
        - value: FILE
-      carries_information:
+      # REMOVED 2026-01-23: carries_information - migrated to has_or_had_content (Rule 53/F25)
+      has_or_had_content:
        required: false
-        range: string
+        range: Content
+        inlined: true
+        description: >-
+          The intellectual content carried by this information carrier.
+          MIGRATED from carries_information (2026-01-23) per Rule 53/F25.
+          Uses Content class with ContentType taxonomy per Rule 0b.
        examples:
-        - value: Vulgate Latin Bible
-        - value: Hamlet by William Shakespeare
+        - value:
+            has_or_had_label: Vulgate Latin Bible
+            has_or_had_type:
+              has_or_had_code: RELIGIOUS
+              has_or_had_label: Religious Content
+          description: Religious text content
+        - value:
+            has_or_had_label: Hamlet by William Shakespeare
+            has_or_had_type:
+              has_or_had_code: LITERARY
+              has_or_had_label: Literary Content
+          description: Literary work
      has_or_had_label:  # was: title_proper and uniform_title (merged 2026-01-15)
        required: false
        range: string
@ -538,7 +582,11 @@ classes:
        object_name: Gutenberg Bible (KB copy)
        object_description: "One of fewer than 50 surviving copies of the Gutenberg Bible, \nthe first substantial book printed\
          \ with movable metal type.\nThis paper copy was acquired by the Koninklijke Bibliotheek in 1807.\n"
-        carrier_type: CODEX
+        # MIGRATED 2026-01-23: carrier_type → has_or_had_carrier (Rule 53/F24)
+        has_or_had_carrier:
+          has_or_had_type:
+            has_or_had_code: CODEX
+            has_or_had_label: Codex
        material_composition:
        - Paper (handmade, watermarked)
        folio_count: 641
@ -561,7 +609,12 @@ classes:
          script_name: "Latin"
        content_language:
        - lat
-        carries_information: Bible. Latin. Vulgate
+        # MIGRATED 2026-01-23: carries_information → has_or_had_content (Rule 53/F25)
+        has_or_had_content:
+          has_or_had_label: Bible. Latin. Vulgate
+          has_or_had_type:
+            has_or_had_code: RELIGIOUS
+            has_or_had_label: Religious Content
        title_proper: Biblia Latina
        uniform_title: Bible. Latin. Vulgate. 1455
        # MIGRATED 2026-01-17: call_number → has_or_had_identifier (Rule 53)
@ -583,7 +636,11 @@ classes:
        object_name: Codex Sinaiticus (British Library portion)
        object_description: "4th-century manuscript of the Greek Bible, one of the oldest \nand most important Biblical manuscripts.\
          \ The British Library \nholds 347 leaves of this codex.\n"
-        carrier_type: CODEX
+        # MIGRATED 2026-01-23: carrier_type → has_or_had_carrier (Rule 53/F24)
+        has_or_had_carrier:
+          has_or_had_type:
+            has_or_had_code: CODEX
+            has_or_had_label: Codex
        material_composition:
        - Parchment (vellum)
        folio_count: 347
@ -594,7 +651,12 @@ classes:
        content_language:
        - grc
        date_of_publication: 4th century CE
-        carries_information: Septuagint and Greek New Testament
+        # MIGRATED 2026-01-23: carries_information → has_or_had_content (Rule 53/F25)
+        has_or_had_content:
+          has_or_had_label: Septuagint and Greek New Testament
+          has_or_had_type:
+            has_or_had_code: RELIGIOUS
+            has_or_had_label: Religious Content
        uniform_title: Bible. Greek
        shelf_mark: Add. MS 43725
        current_keeper: https://nde.nl/ontology/hc/custodian/uk/british-library
@ -608,7 +670,11 @@ classes:
        object_name: Declaration of Independence (engrossed parchment)
        object_description: "The official engrossed parchment copy of the Declaration of \nIndependence, signed by 56 delegates\
          \ to the Continental Congress.\n"
-        carrier_type: PARCHMENT_LEAF
+        # MIGRATED 2026-01-23: carrier_type → has_or_had_carrier (Rule 53/F24)
+        has_or_had_carrier:
+          has_or_had_type:
+            has_or_had_code: PARCHMENT_LEAF
+            has_or_had_label: Parchment Leaf
        material_composition:
        - Parchment (sheepskin)
        script_type: MANUSCRIPT
--- a/schemas/20251121/linkml/modules/classes/InternetOfThings.yaml
+++ b/schemas/20251121/linkml/modules/classes/InternetOfThings.yaml
@ -17,7 +17,8 @@ imports:
  - ./DataFormat
  - ../slots/has_or_had_output
  # REMOVED 2026-01-22: data_format migrated to has_or_had_output + OutputData (Rule 53)
-  - ../slots/decommission_date
+  - ../slots/is_or_was_decommissioned_at  # was: decommission_date - migrated per Rule 53 (2026-01-23)
+  - ./Timestamp  # Range for is_or_was_decommissioned_at
  - ../slots/device_count
  - ../slots/device_id
  - ../slots/device_manufacturer
@ -104,7 +105,7 @@ classes:
    - connectivity_type
    - coverage_area
    - has_or_had_output  # was: data_format - migrated per Rule 53 (2026-01-22)
-    - decommission_date
+    - is_or_was_decommissioned_at  # was: decommission_date - migrated per Rule 53 (2026-01-23)
    - device_count
    - device_id
    - device_manufacturer
@ -273,11 +274,18 @@ classes:
        examples:
        - value: '2023-06-15'
          description: Installation date
-      decommission_date:
-        range: date
+      is_or_was_decommissioned_at:  # was: decommission_date - migrated per Rule 53 (2026-01-23)
+        range: Timestamp
+        inlined: true
+        description: |
+          Timestamp when the IoT device was or will be decommissioned.
+          NULL if still operational.
+          MIGRATED from decommission_date per slot_fixes.yaml (Rule 53).
        examples:
-        - value: '2028-12-31'
-          description: Planned decommission date
+        - value:
+            has_or_had_timestamp: "2028-12-31"
+            has_or_had_precision: day
+          description: Planned decommission date for device
      temporal_extent:
        range: TimeSpan
        examples:
--- a/schemas/20251121/linkml/modules/classes/PersonObservation.yaml
+++ b/schemas/20251121/linkml/modules/classes/PersonObservation.yaml
@ -26,8 +26,9 @@ imports:
  - ../slots/has_or_had_place_of_birth
  - ./BirthPlace
  - ../slots/death_place
-  - ../slots/date_of_death
-  - ../slots/deceased
+  # REMOVED 2026-01-23: ../slots/date_of_death - migrated to is_deceased.temporal_extent (Rule 53)
+  - ../slots/is_deceased  # was: deceased - migrated per Rule 53/56/57 (2026-01-23)
+  - ./DeceasedStatus
  - ../slots/has_age
  - ../slots/occupation
  - ../slots/religion
@ -119,9 +120,9 @@ classes:
    - has_or_had_place_of_birth
    - contact_email
    - created
-    - date_of_death
+    # REMOVED 2026-01-23: date_of_death - migrated to is_deceased.temporal_extent (Rule 53)
    - death_place
-    - deceased
+    - is_deceased  # was: deceased - migrated per Rule 53/56/57 (2026-01-23)
    - expertise_area
    - extraction_metadata
    - gender_identity
@ -215,12 +216,21 @@ classes:
      death_place:
        range: string
        required: false
-      date_of_death:
-        range: TimeSpan
-        required: false
-      deceased:
-        range: boolean
+      # REMOVED 2026-01-23: date_of_death - migrated to is_deceased.temporal_extent (Rule 53)
+      is_deceased:  # was: deceased - migrated per Rule 53/56/57 (2026-01-23)
+        range: DeceasedStatus
+        inlined: true
        required: false
+        description: >-
+          Structured information about death status.
+          Includes cause of death, date, and narrative description.
+        examples:
+          - value:
+              is_or_was_caused_by:
+                cause_type: NATURAL
+              temporal_extent:
+                begin_of_the_begin: "2020-03-15"
+            description: Natural death with known date
      has_age:
        range: string
        required: false
--- a/schemas/20251121/linkml/modules/classes/StaffRole.yaml
+++ b/schemas/20251121/linkml/modules/classes/StaffRole.yaml
@ -14,8 +14,8 @@ imports:
  - ../metadata
  - ../slots/description
  - ../slots/martyred
-  - ../slots/deceased
-  - ../slots/date_of_death
+  # REMOVED 2026-01-23: ../slots/deceased - migrated to is_deceased with DeceasedStatus (Rule 53)
+  # REMOVED 2026-01-23: ../slots/date_of_death - migrated to is_deceased.temporal_extent (Rule 53)
  # REMOVED 2026-01-19: ../slots/circumstances_of_death - migrated to is_deceased with DeceasedStatus
  - ../slots/is_deceased
  - ./DeceasedStatus
@ -171,8 +171,8 @@ classes:
    # REMOVED 2026-01-22: common_variant - migrated to has_or_had_type + VariantType + VariantTypes (Rule 53)
    - has_or_had_type
    - includes_or_included
-    - date_of_death
-    - deceased
+    # REMOVED 2026-01-23: date_of_death - migrated to is_deceased.temporal_extent (Rule 53)
+    # REMOVED 2026-01-23: deceased - migrated to is_deceased with DeceasedStatus (Rule 53)
    - description
    - martyred
    - requires_qualification
@ -196,12 +196,10 @@ classes:
        required: false
      role_category:
        required: false
-      deceased:
-        required: false
+      # REMOVED 2026-01-23: deceased - migrated to is_deceased with DeceasedStatus (Rule 53)
      martyred:
        required: false
-      date_of_death:
-        required: false
+      # REMOVED 2026-01-23: date_of_death - migrated to is_deceased.temporal_extent (Rule 53)
      # REMOVED 2026-01-19: circumstances_of_death - migrated to is_deceased
      is_deceased:
        required: false
@ -268,9 +266,9 @@ classes:
    - A person may hold multiple roles simultaneously
    - Each role observation has independent temporal extent
    - Links to PersonObservation via role_type slot
-    - deceased/martyred slots track vital status of staff member holding this role
+    - is_deceased with DeceasedStatus tracks vital status of staff member holding this role
    - martyred flag specifically for information workers killed due to conflict or persecution
-    - date_of_death uses TimeSpan for fuzzy temporal bounds when exact date unknown
+    - DeceasedStatus.temporal_extent uses TimeSpan for fuzzy temporal bounds when exact date unknown
    see_also:
    - https://www.w3.org/TR/vocab-org/#class-role
    - https://schema.org/Role
--- a/schemas/20251121/linkml/modules/classes/TaxDeductibility.yaml
+++ b/schemas/20251121/linkml/modules/classes/TaxDeductibility.yaml
@ -12,7 +12,8 @@ imports:
  - ../slots/has_or_had_label
  - ../slots/has_or_had_description
  - ../slots/deductibility_status       # Centralized per Rule 48 (2026-01-17)
-  - ../slots/deductibility_conditions   # Centralized per Rule 48 (2026-01-17)
+  - ../slots/has_or_had_condition  # was: deductibility_conditions - migrated per Rule 53 (2026-01-23)
+  - ./Condition  # Range for has_or_had_condition
  - ../slots/minimum_donation           # Centralized per Rule 48 (2026-01-17)
  - ../slots/jurisdiction
  - ../slots/deductible_percentage
@ -51,7 +52,7 @@ classes:
          │
          ├── jurisdiction ──→ Jurisdiction class
          │
-          ├── deductibility_conditions ──→ "Donation must exceed €25"
+          ├── has_or_had_condition ──→ Condition (structured conditions)
          │
          └── effective_from / effective_until ──→ dates
      ```
@ -80,7 +81,7 @@ classes:
    slots:
      - deductibility_status
      - jurisdiction
-      - deductibility_conditions
+      - has_or_had_condition  # was: deductibility_conditions - migrated per Rule 53 (2026-01-23)
      - deductible_percentage
      - minimum_donation
      - effective_from
@ -105,17 +106,27 @@ classes:
              jurisdiction_code: UK
              jurisdiction_name: United Kingdom
            description: United Kingdom
-      deductibility_conditions:
-        range: string
+      has_or_had_condition:  # was: deductibility_conditions - migrated per Rule 53 (2026-01-23)
+        range: Condition
+        inlined: true
+        multivalued: true
        description: |
          Conditions that must be met for tax deductibility.
+          MIGRATED from deductibility_conditions per slot_fixes.yaml (Rule 53).
+          Uses Condition class for structured condition representation.
        examples:
-          - value: Donation must exceed €25 minimum
-            description: Dutch minimum threshold
-          - value: Must complete Gift Aid declaration
-            description: UK Gift Aid requirement
-          - value: Benefits received reduce deductible amount
-            description: Fair market value adjustment
+          - value:
+              has_or_had_type: TAX_THRESHOLD
+              has_or_had_description:
+                description_text: "Donation must exceed €25 minimum"
+                description_type: condition
+            description: Dutch minimum threshold condition
+          - value:
+              has_or_had_type: DECLARATION_REQUIRED
+              has_or_had_description:
+                description_text: "Must complete Gift Aid declaration"
+                description_type: condition
+            description: UK Gift Aid requirement condition
      deductible_percentage:
        range: integer
        description: |
@ -141,7 +152,10 @@ classes:
          jurisdiction:
            jurisdiction_code: NL
            jurisdiction_name: Netherlands
-          deductibility_conditions: Donation must exceed €25 minimum
+          has_or_had_condition:
+            - has_or_had_type: TAX_THRESHOLD
+              has_or_had_description:
+                description_text: "Donation must exceed €25 minimum"
          deductible_percentage: 100
        description: Dutch ANBI fully deductible donation
      - value:
@ -149,7 +163,10 @@ classes:
          jurisdiction:
            jurisdiction_code: UK
            jurisdiction_name: United Kingdom
-          deductibility_conditions: Donor must complete Gift Aid declaration
+          has_or_had_condition:
+            - has_or_had_type: DECLARATION_REQUIRED
+              has_or_had_description:
+                description_text: "Donor must complete Gift Aid declaration"
          deductible_percentage: 100
        description: UK Gift Aid conditional deductibility
      - value:
@ -157,7 +174,10 @@ classes:
          jurisdiction:
            jurisdiction_code: US
            jurisdiction_name: United States
-          deductibility_conditions: Fair market value of benefits received is subtracted
+          has_or_had_condition:
+            - has_or_had_type: FAIR_MARKET_VALUE
+              has_or_had_description:
+                description_text: "Fair market value of benefits received is subtracted"
          deductible_percentage: 70
        description: US gala ticket with partial deductibility
      - value:
@ -165,7 +185,10 @@ classes:
          jurisdiction:
            jurisdiction_code: NL
            jurisdiction_name: Netherlands
-          deductibility_conditions: Membership benefits exceed donation value
+          has_or_had_condition:
+            - has_or_had_type: BENEFIT_EXCEEDS_VALUE
+              has_or_had_description:
+                description_text: "Membership benefits exceed donation value"
        description: Museum membership not tax-deductible
    annotations:
      specificity_score: 0.50
--- a/schemas/20251121/linkml/modules/slots/archive/card_image_url_archived_20260123.yaml
+++ b/schemas/20251121/linkml/modules/slots/archive/card_image_url_archived_20260123.yaml
--- a/schemas/20251121/linkml/modules/slots/archive/card_title_archived_20260123.yaml
+++ b/schemas/20251121/linkml/modules/slots/archive/card_title_archived_20260123.yaml
--- a/schemas/20251121/linkml/modules/slots/archive/card_title_en_archived_20260123.yaml
+++ b/schemas/20251121/linkml/modules/slots/archive/card_title_en_archived_20260123.yaml
--- a/schemas/20251121/linkml/modules/slots/archive/card_url_archived_20260123.yaml
+++ b/schemas/20251121/linkml/modules/slots/archive/card_url_archived_20260123.yaml
--- a/schemas/20251121/linkml/modules/slots/archive/carrier_type_archived_20260123.yaml
+++ b/schemas/20251121/linkml/modules/slots/archive/carrier_type_archived_20260123.yaml
--- a/schemas/20251121/linkml/modules/slots/archive/carries_information_archived_20260123.yaml
+++ b/schemas/20251121/linkml/modules/slots/archive/carries_information_archived_20260123.yaml
--- a/schemas/20251121/linkml/modules/slots/archive/date_created_archived_20260123.yaml
+++ b/schemas/20251121/linkml/modules/slots/archive/date_created_archived_20260123.yaml
--- a/schemas/20251121/linkml/modules/slots/archive/date_identified_archived_20260123.yaml
+++ b/schemas/20251121/linkml/modules/slots/archive/date_identified_archived_20260123.yaml
--- a/schemas/20251121/linkml/modules/slots/archive/date_of_death_archived_20260123.yaml
+++ b/schemas/20251121/linkml/modules/slots/archive/date_of_death_archived_20260123.yaml
--- a/schemas/20251121/linkml/modules/slots/archive/date_precision_archived_20260123.yaml
+++ b/schemas/20251121/linkml/modules/slots/archive/date_precision_archived_20260123.yaml
--- a/schemas/20251121/linkml/modules/slots/archive/deceased_archived_20260123.yaml
+++ b/schemas/20251121/linkml/modules/slots/archive/deceased_archived_20260123.yaml
--- a/schemas/20251121/linkml/modules/slots/archive/decommission_date_archived_20260123.yaml
+++ b/schemas/20251121/linkml/modules/slots/archive/decommission_date_archived_20260123.yaml
--- a/schemas/20251121/linkml/modules/slots/degree_of_certainty.yaml
+++ b/schemas/20251121/linkml/modules/slots/degree_of_certainty.yaml
@ -0,0 +1,40 @@
+id: https://nde.nl/ontology/hc/slot/degree_of_certainty
+name: degree_of_certainty_slot
+title: Degree of Certainty Slot
+description: >-
+  The degree of certainty or precision associated with a value.
+  
+  Used to indicate how specific or certain information is, particularly
+  for temporal data (dates) and other values that may have varying
+  levels of precision.
+
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+  crm: http://www.cidoc-crm.org/cidoc-crm/
+
+imports:
+  - linkml:types
+
+default_prefix: hc
+
+slots:
+  degree_of_certainty:
+    description: >-
+      The degree of certainty or precision for a value.
+      
+      Used to qualify values that may have varying levels of specificity,
+      such as dates (day, month, year, decade, century) or confidence
+      levels for inferred data.
+    slot_uri: crm:P91_has_unit
+    range: string
+    close_mappings:
+      - crm:P91_has_unit
+    annotations:
+      specificity_score: 0.30
+      specificity_rationale: >-
+        Certainty/precision levels are broadly applicable across temporal,
+        quantitative, and qualitative contexts.
+      custodian_types: '["*"]'
+      custodian_types_rationale: >-
+        Degree of certainty applies universally to all custodian types.
--- a/schemas/20251121/linkml/modules/slots/has_or_had_carrier.yaml
+++ b/schemas/20251121/linkml/modules/slots/has_or_had_carrier.yaml
@ -0,0 +1,49 @@
+# has_or_had_carrier slot
+# Generic slot for linking physical carriers to information carrier instances
+#
+# Following RiC-O naming convention (Rule 39): "hasOrHad..." pattern
+# for temporal relationships in heritage domain.
+#
+# Created: 2026-01-23 per slot_fixes.yaml F24 (carrier_type migration)
+# Rule compliance: 38, 39, 42, 53
+
+id: https://nde.nl/ontology/hc/slot/has_or_had_carrier
+name: has_or_had_carrier_slot
+title: Has Or Had Carrier Slot
+
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+  bf: http://id.loc.gov/ontologies/bibframe/
+  rda: http://rdaregistry.info/termList/
+  crm: http://www.cidoc-crm.org/cidoc-crm/
+  dcterms: http://purl.org/dc/terms/
+
+default_prefix: hc
+
+imports:
+  - linkml:types
+
+slots:
+  has_or_had_carrier:
+    description: >-
+      The physical carrier on which information is recorded.
+      
+      Links information-bearing objects to their physical carrier characteristics
+      including material type, format, and physical properties.
+      
+      MIGRATED from carrier_type (2026-01-23) per Rule 53.
+      Replaces direct enum reference with structured Carrier class
+      for richer metadata and Type/Types pattern compliance (Rule 0b).
+    slot_uri: bf:carrier
+    range: Carrier
+    multivalued: false
+    inlined: true
+    exact_mappings:
+      - bf:carrier
+      - rda:P60048
+    close_mappings:
+      - crm:P46_is_composed_of
+    annotations:
+      custodian_types: '["L", "A", "R", "M"]'
+      custodian_types_rationale: 'Primarily used by libraries, archives, research centers, and museums with documentary collections'
--- a/schemas/20251121/linkml/modules/slots/has_or_had_image.yaml
+++ b/schemas/20251121/linkml/modules/slots/has_or_had_image.yaml
@ -0,0 +1,38 @@
+id: https://nde.nl/ontology/hc/slot/has_or_had_image
+name: has_or_had_image_slot
+title: Has or Had Image Slot
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+  schema: http://schema.org/
+  foaf: http://xmlns.com/foaf/0.1/
+imports:
+  - linkml:types
+default_range: string
+
+slots:
+  has_or_had_image:
+    slot_uri: schema:image
+    description: >-
+      Links to an Image representing visual content.
+      
+      **USE CASES**:
+      - Card thumbnail images
+      - Collection preview images
+      - Institutional logos
+      - Digital object representations
+      
+      **ONTOLOGY ALIGNMENT**:
+      - slot_uri: schema:image (primary)
+      - Also maps to foaf:depiction
+      
+      MIGRATED 2026-01-22: Created per slot_fixes.yaml revision for card_image_url.
+    range: Image
+    inlined: true
+    multivalued: true
+    exact_mappings:
+      - schema:image
+      - foaf:depiction
+    annotations:
+      custodian_types: '["*"]'
+      custodian_types_rationale: Images are universal across all heritage contexts
--- a/schemas/20251121/linkml/modules/slots/is_or_was_decommissioned_at.yaml
+++ b/schemas/20251121/linkml/modules/slots/is_or_was_decommissioned_at.yaml
@ -0,0 +1,73 @@
+# is_or_was_decommissioned_at slot
+# Timestamp when an entity was or will be decommissioned
+#
+# Generation date: 2026-01-23
+# Rule compliance: 39 (RiC-O temporal naming), 53 (slot_fixes.yaml)
+#
+# Replaces: decommission_date
+# Target class: Timestamp
+
+id: https://nde.nl/ontology/hc/slot/is_or_was_decommissioned_at
+name: is_or_was_decommissioned_at_slot
+title: Is Or Was Decommissioned At Slot
+
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+  prov: http://www.w3.org/ns/prov#
+  dcterms: http://purl.org/dc/terms/
+  schema: http://schema.org/
+
+default_prefix: hc
+
+imports:
+  - linkml:types
+
+slots:
+  is_or_was_decommissioned_at:
+    description: |
+      Timestamp when an entity was or will be decommissioned.
+      
+      **Purpose**:
+      Records the date/time when an IoT device, system, or other entity
+      was taken out of service or is scheduled for decommissioning.
+      NULL if still operational.
+      
+      **Temporal Semantics** (Rule 39 - RiC-O style):
+      The "is_or_was_" prefix indicates this timestamp applies to both:
+      - Past events: device was decommissioned on this date
+      - Future events: device is scheduled to be decommissioned
+      
+      **Use Cases**:
+      - IoT device lifecycle management
+      - Equipment retirement tracking
+      - System sunset planning
+      - Infrastructure decommissioning records
+      
+      **Replaces**: decommission_date (per slot_fixes.yaml)
+      
+    range: Timestamp
+    slot_uri: prov:invalidatedAtTime
+    
+    exact_mappings:
+      - prov:invalidatedAtTime
+    
+    close_mappings:
+      - schema:expires
+      - dcterms:date
+    
+    annotations:
+      custodian_types: '["*"]'
+      custodian_types_rationale: Generic timestamp applicable to any decommissionable entity.
+      specificity_score: 0.45
+      specificity_rationale: Specific to lifecycle management but applicable across entity types.
+    
+    examples:
+      - value:
+          has_or_had_timestamp: "2028-12-31"
+          has_or_had_precision: day
+        description: Planned decommission date for IoT device
+      - value:
+          has_or_had_timestamp: "2024-06-15"
+          has_or_had_precision: day
+        description: Actual decommission date when device was retired
--- a/schemas/20251121/linkml/modules/slots/is_or_was_identified_through.yaml
+++ b/schemas/20251121/linkml/modules/slots/is_or_was_identified_through.yaml
@ -0,0 +1,61 @@
+# is_or_was_identified_through - Identification event slot
+#
+# Created per slot_fixes.yaml migration for: date_identified
+# Creation date: 2026-01-23
+# Rule compliance: 39 (RiC-O naming), 50 (ontology mapping), 53 (generic slot reuse)
+
+id: https://nde.nl/ontology/hc/slot/is_or_was_identified_through
+name: is_or_was_identified_through_slot
+title: Is Or Was Identified Through Slot
+
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+  dwc: http://rs.tdwg.org/dwc/terms/
+  prov: http://www.w3.org/ns/prov#
+
+default_prefix: hc
+
+imports:
+  - linkml:types
+
+slots:
+  is_or_was_identified_through:
+    slot_uri: hc:isOrWasIdentifiedThrough
+    description: |
+      Identification event that determined the identity of a specimen or object.
+      
+      **SEMANTIC PATTERN**:
+      This slot follows the RiC-O temporal predicate pattern (is_or_was_*)
+      to indicate that identification is a historical event that may be
+      superseded by later identifications.
+      
+      **REPLACES**:
+      - `date_identified` - Simple date string for identification
+      
+      **RANGE**: IdentificationEvent
+      Structured event class capturing who, when, where, and how
+      the identification was made.
+      
+      **ONTOLOGY ALIGNMENT**:
+      - **Close**: `dwc:dateIdentified` - Darwin Core identification date
+      - **Close**: `prov:wasGeneratedBy` - PROV-O activity
+      
+    range: IdentificationEvent
+    inlined: true
+    
+    close_mappings:
+      - dwc:dateIdentified
+      - prov:wasGeneratedBy
+    
+    examples:
+      - value:
+          temporal_extent:
+            begin_of_the_begin: "2023-05-15"
+          identified_by:
+            agent_name: "Dr. J. Smith"
+        description: Specimen identification event
+    
+    annotations:
+      custodian_types: '["M", "R", "B"]'
+      custodian_types_rationale: "Identification events primarily relevant to museums, research centers, and botanical/zoological collections."
--- a/schemas/20251121/linkml/modules/slots/is_or_was_published.yaml
+++ b/schemas/20251121/linkml/modules/slots/is_or_was_published.yaml
@ -0,0 +1,29 @@
+id: https://nde.nl/ontology/hc/slot/is_or_was_published
+name: is_or_was_published_slot
+title: Is Or Was Published Slot
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+  schema: http://schema.org/
+  prov: http://www.w3.org/ns/prov#
+imports:
+  - linkml:types
+default_prefix: hc
+slots:
+  is_or_was_published:
+    description: >-
+      Links an information carrier or creative work to its publication event(s).
+      Follows RiC-O temporal naming convention (Rule 39) to indicate the publication
+      may be historical. The Publication class captures date via temporal_extent,
+      publisher, place of publication, and edition information.
+    range: Publication
+    slot_uri: schema:publication
+    multivalued: true
+    inlined: true
+    inlined_as_list: true
+    exact_mappings:
+      - schema:datePublished
+    annotations:
+      replaces: date_of_publication
+      migration_date: '2026-01-23'
+      migration_rule: Rule 53 - No bespoke slots
--- a/schemas/20251121/linkml/modules/slots/manifest.json
+++ b/schemas/20251121/linkml/modules/slots/manifest.json
@ -22,12 +22,8 @@
        "capacity_type.yaml",
        "has_or_had_main_part.yaml",
        "has_or_had_caption.yaml",
-        "card_image_url.yaml",
-        "card_title.yaml",
-        "card_title_en.yaml",
-        "card_url.yaml",
-        "carrier_type.yaml",
-        "carries_information.yaml",
+        "has_or_had_image.yaml",
+        "has_or_had_carrier.yaml",
        "catalog_raisonne_number.yaml",
        "catalog_system.yaml",
        "category_measurement.yaml",
@ -189,13 +185,13 @@
        "date_identified.yaml",
        "date_of_death.yaml",
        "date_of_publication.yaml",
-        "date_precision.yaml",
+        "__ARCHIVED_20260123__date_precision.yaml",
        "__ARCHIVED_20260123__date_retrieved.yaml",
        "__ARCHIVED_20260123__de.yaml",
        "dealer_name.yaml",
        "death_place.yaml",
-        "deceased.yaml",
-        "decommission_date.yaml",
+        "__ARCHIVED_20260123__deceased.yaml",
+        "__ARCHIVED_20260123__decommission_date.yaml",
        "deductibility_conditions.yaml",
        "deductibility_status.yaml",
        "deductible_percentage.yaml",
@ -207,6 +203,7 @@
        "defined_by_standard.yaml",
        "definition.yaml",
        "degree_name.yaml",
+        "degree_of_certainty.yaml",
        "deliverable.yaml",
        "departement_code.yaml",
        "departement_name.yaml",
@ -1066,6 +1063,7 @@
        "is_or_was_collection_of.yaml",
        "is_or_was_created_through.yaml",
        "is_or_was_derived_from.yaml",
+        "is_or_was_decommissioned_at.yaml",
        "is_or_was_encompassed_by.yaml",
        "is_or_was_equivalent_to.yaml",
        "is_or_was_extracted_using.yaml",
--- a/schemas/20251121/linkml/modules/slots/slot_fixes.yaml
+++ b/schemas/20251121/linkml/modules/slots/slot_fixes.yaml