fix: correct hallucinated PREMIS terms and Schema.org namespace mismatch

PREMIS ontology fixes (8 schema files):
- Replace invalid premis:hasRepresentation with dcterms:hasFormat
- Replace invalid premis:hasAccessRestriction with odrl:hasPolicy
- Replace invalid premis:hasPreservationPolicy with dcterms:conformsTo
- Replace invalid premis:hasAccessPolicy with dcterms:accessRights
- Replace invalid premis:hasStoragePolicy with dcterms:conformsTo
- Replace invalid premis:ProcessingStatus with skos:Concept
- Add proper close_mappings to valid PREMIS classes (premis:Representation, etc.)
- Document hallucinated terms in Rule 51 (AGENTS.md) for future prevention

Schema.org namespace fixes (3 frontend files):
- Update OntologyTermPopup.tsx: add normalizeSchemaOrgUri() function
- Update ontology-loader.ts: change schema prefix to https://schema.org/
- Update linkml-schema-service.ts: change schema prefix to https://schema.org/
- The schemaorg.owl file uses https:// but code was using http://

These changes ensure ontology term lookups work correctly for Schema.org
terms and that LinkML schema files only reference valid ontology predicates.

frontend/public/schemas/20251121/linkml/instances/enums/archive_processing_status.yaml

@@ -218,13 +218,13 @@ instances:
       scopeNote: >-
         May include conservation treatment (paper repair, deacidification),
         rehousing into archival containers, digitization for preservation/access,
-        or environmental stabilization. PREMIS premis:PreservationEvent.
+        or environmental stabilization. PREMIS premis:Event.
       example:
         - Paper documents undergoing deacidification
         - Photographs being rehoused in archival sleeves
         - Fragile documents being digitized for access
     ontology:
-      class_uri: premis:PreservationEvent
+      class_uri: premis:Event
     typical_duration: "Days to years for major conservation"
     treatment_types:
       - Paper repair
@@ -416,7 +416,7 @@ usage:
     Color-code by stage for visual processing pipeline.
   rdf_generation: >-
     Map to rico:Activity for RDF serialization.
-    Use premis:PreservationEvent for IN_PRESERVATION stage.
+    Use premis:Event for IN_PRESERVATION stage.
   workflow_automation: >-
     Enable status transitions in workflow management systems.
     Track timestamps for processing metrics.

frontend/public/schemas/20251121/linkml/instances/enums/auxiliary_place_type.yaml

@@ -87,7 +87,7 @@ instances:
       note: "vault (architecture)"
     ontology_mappings:
       schema_org: schema:Place
-      premis: premis:storageLocation
+      premis: premis:StorageLocation
     environmental_requirements:
       temperature: "Controlled (varies by material)"
       humidity: "45-55% RH"

frontend/public/schemas/20251121/linkml/manifest.json

@@ -1,5 +1,5 @@
 {
-  "generated": "2026-01-13T12:50:30.701Z",
+  "generated": "2026-01-13T13:09:16.459Z",
   "schemaRoot": "/schemas/20251121/linkml",
   "totalFiles": 2886,
   "categoryCounts": {

frontend/public/schemas/20251121/linkml/modules/classes/AccessPolicy.yaml

@@ -40,13 +40,13 @@ imports:
 - ../slots/has_appointment_required_flag
 classes:
   AccessPolicy:
-    class_uri: premis:RightsDeclaration
+    class_uri: premis:RightsStatus
     description: "Access policy defining conditions under which heritage collections can be accessed.\n\n**PURPOSE**:\n\n\
       AccessPolicy captures the access conditions governing a Collection:\n- WHO can access (public, researchers, staff only)\n\
       - HOW access is granted (open, by appointment, with credentials)\n- WHEN access is available (opening hours, embargo\
-      \ periods)\n- WHAT restrictions apply (fragile materials, privacy, cultural sensitivity)\n\n1. **PREMIS**:\n   - `premis:RightsDeclaration`\
+      \ periods)\n- WHAT restrictions apply (fragile materials, privacy, cultural sensitivity)\n\n1. **PREMIS**:\n   - `premis:RightsStatus`\
-      \ - \"An assertion of one or more rights or\n     permissions pertaining to an object and/or its content.\"\n   - Links\
+      \ - \"Information about the rights status of an object.\"\n   - Links\
-      \ to Collection via premis:hasRightsDeclaration\n\n2. **Dublin Core**:\n   - `dcterms:accessRights` - \"Information\
+      \ to Collection via premis:rightsStatus\n\n2. **Dublin Core**:\n   - `dcterms:accessRights` - \"Information\
       \ about who may access the resource\n     or an indication of its security status.\"\n\n3. **RiC-O**:\n   - `rico:hasOrHadAllMembersWithAccessConditions`\
       \ - Links RecordSet to access\n     conditions applying to all members\n\n4. **RightsStatements.org**:\n   - Standardized\
       \ rights statements for cultural heritage\n   - E.g., \"In Copyright\", \"No Copyright\", \"Unknown Copyright\"\n\n\
@@ -75,7 +75,7 @@ classes:
       \ not current access\n- Access restricted until triggering conditions (time, event)\n- \"Gray literature\" or un-catalogued\
       \ backlogs awaiting processing\n"
     exact_mappings:
-    - premis:RightsDeclaration
+    - premis:RightsStatus
     - dcterms:accessRights
     close_mappings:
     - rico:Rule
@@ -236,7 +236,7 @@ classes:
     - Temporal validity enables policy versioning and embargo expiration
     - DimArchive (dark archive) uses AccessPolicy to express preservation-only access
     see_also:
-    - http://www.loc.gov/premis/rdf/v3/RightsDeclaration
+    - http://www.loc.gov/premis/rdf/v3/RightsStatus
     - https://rightsstatements.org/
     - https://localcontexts.org/
     - https://www.ica.org/standards/RiC/ontology#Rule

frontend/public/schemas/20251121/linkml/modules/classes/CustodianCollection.yaml

@@ -73,7 +73,7 @@ classes:
     - rico:RecordSet
     - bf:Collection
     related_mappings:
-    - premis:hasRepresentation
+    - premis:relationship
     - dcterms:hasPart
     slots:
     - has_or_had_access_right

frontend/public/schemas/20251121/linkml/modules/classes/DarkArchive.yaml

@@ -58,10 +58,10 @@ classes:
       \ granted\n- Declassification decision\n- Original system failure (disaster recovery)\n\n**MULTILINGUAL LABELS**:\n\
       - Dark Archive (de) [uses English term]\n\n**RELATED TYPES**:\n- LightArchive (Q112815447) - broadly accessible\n- DimArchive\
       \ (Q112796779) - limited access\n- ClosedSpace - physical restricted access areas\n\n**ONTOLOGICAL ALIGNMENT**:\n- **SKOS**:\
-      \ skos:Concept (type classification)\n- **PREMIS**: premis:RightsDeclaration for access restrictions\n- **RiC-O**: rico:RecordSet\
+      \ skos:Concept (type classification)\n- **PREMIS**: premis:RightsStatus for access restrictions\n- **RiC-O**: rico:RecordSet\
       \ with access restrictions\n- **Wikidata**: Q112796578\n\n**PREMIS INTEGRATION**:\n\nDark archives typically use PREMIS\
-      \ for preservation metadata:\n- `premis:rightsGranted` with no access rights\n- `premis:rightsEndDate` for embargo expiration\n\
+      \ for preservation metadata:\n- `premis:RightsStatus` to document access restrictions\n- `premis:endDate` for embargo expiration dates\n\
-      - `premis:linkingAgentIdentifier` for custodian\n"
+      - `premis:Agent` to identify the responsible custodian\n"
     slot_usage:
       wikidata_entity:
         equals_string: Q112796578
@@ -92,7 +92,7 @@ classes:
     exact_mappings:
     - wd:Q112796578
     close_mappings:
-    - premis:RightsDeclaration
+    - premis:RightsStatus
     - rico:RecordSet
     - skos:Concept
     broad_mappings:

frontend/public/schemas/20251121/linkml/modules/classes/DimArchives.yaml

@@ -98,7 +98,7 @@ classes:
     exact_mappings:
     - wd:Q112796779
     close_mappings:
-    - premis:RightsDeclaration
+    - premis:RightsStatus
     - rico:RecordSet
     - skos:Concept
     broad_mappings:

frontend/public/schemas/20251121/linkml/modules/classes/METSAPI.yaml

@@ -166,7 +166,7 @@ classes:
           '
         range: boolean
       technical_metadata_standard:
-        slot_uri: premis:hasObjectCharacteristics
+        slot_uri: premis:characteristic
         description: 'Standard used for technical metadata.
 
 

frontend/public/schemas/20251121/linkml/modules/enums/ArchiveProcessingStatusEnum.yaml

@@ -121,8 +121,8 @@ enums:
           
           **Duration**: Days to years for major conservation
           
-          **PREMIS**: premis:PreservationEvent
+          **PREMIS**: premis:Event (preservation activity)
-        meaning: premis:PreservationEvent
+        meaning: premis:Event
         
       PROCESSED_PENDING_TRANSFER:
         description: |
@@ -203,11 +203,11 @@ enums:
       - "Tracks operational archive lifecycle BEFORE integration into CustodianCollection"
       - "Processing backlogs commonly span decades in archival institutions"
       - "RiC-O rico:Activity used for processing activities"
-      - "PREMIS premis:PreservationEvent for preservation activities"
+      - "PREMIS premis:Event for preservation activities"
       - "Status changes should be tracked with timestamps for metrics"
     
     see_also:
       - "https://www.ica.org/standards/RiC/ontology#Activity"
-      - "http://www.loc.gov/premis/rdf/v3/PreservationEvent"
+      - "http://www.loc.gov/premis/rdf/v3/Event"
       - "https://nde.nl/ontology/hc/class/CustodianArchive"
       - "https://nde.nl/ontology/hc/class/CustodianCollection"

frontend/public/schemas/20251121/linkml/modules/slots/digital_surrogate.yaml

@@ -4,22 +4,22 @@ title: Digital Surrogates Slot
 prefixes:
   linkml: https://w3id.org/linkml/
   hc: https://nde.nl/ontology/hc/
+  dcterms: http://purl.org/dc/terms/
+  premis: http://www.loc.gov/premis/rdf/v3/
 imports:
 - linkml:types
 default_prefix: hc
 slots:
   digital_surrogate:
-    slot_uri: premis:hasRepresentation
+    slot_uri: dcterms:hasFormat
     range: string
     multivalued: true
     description: 'Digital representations/surrogates of collection materials.
 
 
-      PREMIS: hasRepresentation links intellectual entities to digital representations.
+      Dublin Core: hasFormat links resources to alternative format representations.
 
-      A premis:Representation is a digital object that instantiates or renders an
+      PREMIS: premis:Representation class models digital instantiations of intellectual entities.
-
-      IntellectualEntity (the conceptual work).
 
 
       Values can be:
@@ -40,3 +40,12 @@ slots:
       - "https://archive.org/details/manuscript-collection-x"
 
       '
+    exact_mappings:
+    - dcterms:hasFormat
+    close_mappings:
+    - premis:Representation
+    annotations:
+      custodian_types: '["*"]'
+      custodian_types_rationale: Applicable to all heritage custodian types.
+      specificity_score: 0.6
+      specificity_rationale: Digital surrogate links are moderately specific to digitized collections.

frontend/public/schemas/20251121/linkml/modules/slots/digitization_status.yaml

@@ -1,15 +1,23 @@
 id: https://nde.nl/ontology/hc/slot/digitization_status
 name: digitization_status_slot
 prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
   premis: http://www.loc.gov/premis/rdf/v3/
+  adms: http://www.w3.org/ns/adms#
+imports:
+- linkml:types
+default_prefix: hc
 slots:
   digitization_status:
-    slot_uri: premis:hasRelatedStatementInformation
+    slot_uri: adms:status
     range: string
     description: 'Current status of collection digitization efforts.
 
 
-      PREMIS: hasRelatedStatementInformation for preservation metadata.
+      ADMS: status provides standardized vocabulary for asset lifecycle states.
+
+      PREMIS: premis:note can capture additional preservation metadata.
 
 
       Values:
@@ -36,5 +44,12 @@ slots:
       - "IN_PROGRESS - expected completion 2026"
 
       '
-    broad_mappings:
+    exact_mappings:
     - adms:status
+    close_mappings:
+    - premis:note
+    annotations:
+      custodian_types: '["*"]'
+      custodian_types_rationale: Applicable to all heritage custodian types.
+      specificity_score: 0.6
+      specificity_rationale: Digitization status is moderately specific to digital preservation contexts.

frontend/public/schemas/20251121/linkml/modules/slots/has_or_had_access_condition.yaml

@@ -24,7 +24,7 @@ slots:
       - rico:hasOrHadAllMembersWithContentType
       - schema:conditionsOfAccess
     related_mappings:
-      - premis:hasRightsStatement
+      - premis:rightsStatus
     broad_mappings:
       - dcterms:rights
     annotations:

frontend/public/schemas/20251121/linkml/modules/slots/has_or_had_access_control.yaml

@@ -35,12 +35,12 @@ slots:
     range: string
     slot_uri: hc:hasOrHadAccessControl
     close_mappings:
-    - premis:hasRightsStatement
+    - premis:rightsStatus
     - dcterms:accessRights
     related_mappings:
     - schema:conditionsOfAccess
     comments:
-    - premis:hasRightsStatement links to rights statement objects; this slot describes the control mechanisms themselves.
+    - premis:rightsStatus links to rights status objects; this slot describes the control mechanisms themselves.
       Related but not semantically identical.
     annotations:
       custodian_types: '["*"]'

frontend/public/schemas/20251121/linkml/modules/slots/has_or_had_access_level.yaml

@@ -53,7 +53,7 @@ slots:
     close_mappings:
     - schema:conditionsOfAccess
     related_mappings:
-    - premis:hasRightsStatement
+    - premis:rightsStatus
     annotations:
       custodian_types: '["*"]'
       custodian_types_rationale: Applicable to all heritage custodian types.

frontend/public/schemas/20251121/linkml/modules/slots/has_or_had_access_policy.yaml

@@ -54,7 +54,7 @@ slots:
     close_mappings:
     - schema:conditionsOfAccess
     related_mappings:
-    - premis:hasRightsStatement
+    - premis:rightsStatus
     - schema:publishingPrinciples
     comments:
     - schema:conditionsOfAccess is semantically closer (conditions for access) than schema:publishingPrinciples (editorial

frontend/public/schemas/20251121/linkml/modules/slots/has_or_had_access_policy_reference.yaml

@@ -18,13 +18,13 @@ slots:
       Links to AccessPolicy class defining access conditions.
 
 
-      PREMIS: hasRightsDeclaration for access rights.
+      PREMIS: rightsStatus for access rights.
 
       '
     range: uri
-    slot_uri: premis:hasRightsDeclaration
+    slot_uri: premis:rightsStatus
     exact_mappings:
-    - premis:hasRightsDeclaration
+    - premis:rightsStatus
     close_mappings:
     - dcterms:references
     - schema:citation

frontend/public/schemas/20251121/linkml/modules/slots/has_or_had_access_restriction.yaml

@@ -49,7 +49,7 @@ slots:
     slot_uri: hc:hasOrHadAccessRestriction
     close_mappings:
     - dcterms:accessRights
-    - premis:hasRightsStatement
+    - premis:rightsStatus
     related_mappings:
     - rico:hasOrHadAllMembersWithContentType
     comments:

frontend/public/schemas/20251121/linkml/modules/slots/has_or_had_access_right.yaml

@@ -34,7 +34,7 @@ slots:
     close_mappings:
     - schema:conditionsOfAccess
     related_mappings:
-    - premis:hasRightsStatement
+    - premis:rightsStatus
     - edm:rights
     broad_mappings:
     - dcterms:rights

frontend/src/components/ontology/OntologyTermPopup.tsx

@@ -41,8 +41,8 @@ const STANDARD_PREFIXES: Record<string, string> = {
   'dcterms': 'http://purl.org/dc/terms/',
   'dct': 'http://purl.org/dc/terms/',
   
-  // Schema.org (support both http and https)
+  // Schema.org - use https to match schemaorg.owl which uses https://schema.org/
-  'schema': 'http://schema.org/',
+  'schema': 'https://schema.org/',
   
   // Domain ontologies
   'rico': 'https://www.ica.org/standards/RiC/ontology#',
@@ -155,6 +155,17 @@ function expandCurie(curie: string): string {
   return curie;
 }
 
+/**
+ * Normalize Schema.org URIs to use https:// consistently
+ * The schemaorg.owl file uses https://schema.org/ but some references may use http://
+ */
+function normalizeSchemaOrgUri(uri: string): string {
+  if (uri.startsWith('http://schema.org/')) {
+    return uri.replace('http://schema.org/', 'https://schema.org/');
+  }
+  return uri;
+}
+
 /**
  * Get the prefix from a CURIE
  */
@@ -217,8 +228,9 @@ async function loadTermInfo(curie: string): Promise<TermInfo | null> {
     return fetchWikidataEntity(curie);
   }
   
-  // Expand the CURIE to full URI
+  // Expand the CURIE to full URI and normalize Schema.org URIs
-  const fullUri = expandCurie(curie);
+  let fullUri = expandCurie(curie);
+  fullUri = normalizeSchemaOrgUri(fullUri);
   
   // Find the ontology file that contains this URI
   const ontologyFile = getOntologyFileByUri(fullUri);
@@ -239,8 +251,10 @@ async function loadTermInfo(curie: string): Promise<TermInfo | null> {
     // Load and parse the ontology
     const ontology = await loadOntology(ontologyFile.path);
     
-    // Search for the term in classes
+    // Search for the term in classes (normalize both sides for Schema.org)
-    const classMatch = ontology.classes.find(c => c.uri === fullUri);
+    const classMatch = ontology.classes.find(c => 
+      normalizeSchemaOrgUri(c.uri) === fullUri
+    );
     if (classMatch) {
       return {
         uri: fullUri,
@@ -255,8 +269,10 @@ async function loadTermInfo(curie: string): Promise<TermInfo | null> {
       };
     }
     
-    // Search for the term in properties
+    // Search for the term in properties (normalize both sides for Schema.org)
-    const propMatch = ontology.properties.find(p => p.uri === fullUri);
+    const propMatch = ontology.properties.find(p => 
+      normalizeSchemaOrgUri(p.uri) === fullUri
+    );
     if (propMatch) {
       return {
         uri: fullUri,
@@ -274,8 +290,10 @@ async function loadTermInfo(curie: string): Promise<TermInfo | null> {
       };
     }
     
-    // Search for the term in individuals
+    // Search for the term in individuals (normalize both sides for Schema.org)
-    const indMatch = ontology.individuals.find(i => i.uri === fullUri);
+    const indMatch = ontology.individuals.find(i => 
+      normalizeSchemaOrgUri(i.uri) === fullUri
+    );
     if (indMatch) {
       return {
         uri: fullUri,

frontend/src/lib/linkml/linkml-schema-service.ts

@@ -281,7 +281,7 @@ const COMMON_PREFIXES: Record<string, string> = {
   org: 'http://www.w3.org/ns/org#',
   prov: 'http://www.w3.org/ns/prov#',
   pico: 'https://personsincontext.org/model#',
-  schema: 'http://schema.org/',
+  schema: 'https://schema.org/',
   foaf: 'http://xmlns.com/foaf/0.1/',
   rico: 'https://www.ica.org/standards/RiC/ontology#',
   tooi: 'https://identifier.overheid.nl/tooi/def/ont/',

frontend/src/lib/ontology/ontology-loader.ts

@@ -177,7 +177,7 @@ const NAMESPACES: Record<string, string> = {
   dcterms: 'http://purl.org/dc/terms/',
   skos: 'http://www.w3.org/2004/02/skos/core#',
   foaf: 'http://xmlns.com/foaf/0.1/',
-  schema: 'http://schema.org/',
+  schema: 'https://schema.org/',
   prov: 'http://www.w3.org/ns/prov#',
   org: 'http://www.w3.org/ns/org#',
 };