glam/schemas/20251121/linkml/modules/classes/DarkArchive.yaml

id: https://nde.nl/ontology/hc/class/DarkArchive
name: dark_archive_class
title: Dark Archive Type
prefixes:
  linkml: https://w3id.org/linkml/
  schema: http://schema.org/
  hc: https://nde.nl/ontology/hc/
  skos: http://www.w3.org/2004/02/skos/core#
  wd: http://www.wikidata.org/entity/
  premis: http://www.loc.gov/premis/rdf/v3/
  rico: https://www.ica.org/standards/RiC/ontology#
default_prefix: hc
imports:
  - linkml:types
  - ./ArchiveOrganizationType
  - ./AccessPolicy
  - ../slots/embargo_end_date
  - ./DarkArchiveRecordSetTypes
  - ../slots/hold_or_held_record_set_type
  - ./CollectionType
  - ../slots/has_or_had_scope  # was: type_scope - migrated per Rule 53 (2026-01-15)
  - ./Scope  # for has_or_had_scope range (2026-01-15)
  - ../slots/has_or_had_custodian_type
  - ../slots/preservation_purpose
  - ../slots/refers_to_access_policy
  - ../slots/specificity_annotation
  - ../slots/has_or_had_score  # was: template_specificity - migrated per Rule 53 (2026-01-17)
  - ../slots/has_or_had_identifier  # was: wikidata_entity - migrated per Rule 53 (2026-01-15)
  - ./WikiDataIdentifier  # for has_or_had_identifier range
  - ./SpecificityAnnotation
  - ./TemplateSpecificityScore  # was: TemplateSpecificityScores - migrated per Rule 53 (2026-01-17)

  - ./TemplateSpecificityType

  - ./TemplateSpecificityTypes
  - ../slots/has_or_had_access_trigger_event
  - ./DarkArchiveRecordSetType
classes:
  DarkArchive:
    is_a: ArchiveOrganizationType
    class_uri: schema:ArchiveOrganization
    slots:
    - has_or_had_access_trigger_event
    - has_or_had_custodian_type
    - embargo_end_date
    - hold_or_held_record_set_type
    - preservation_purpose
    - refers_to_access_policy
    - specificity_annotation
    - has_or_had_score  # was: template_specificity - migrated per Rule 53 (2026-01-17)
    - has_or_had_identifier  # was: wikidata_entity - migrated per Rule 53 (2026-01-15)
    description: "Archive preserving materials for future use but with NO CURRENT ACCESS.\n\n**Wikidata**: Q112796578 (Dark\
      \ Archive)\n\n**DEFINITION**:\n\nDark Archive is a preservation repository where materials are stored with \nNO ACCESS\
      \ provided to users. The primary purpose is long-term preservation\nrather than current use. Access may be triggered\
      \ by specific future events.\n\n**ACCESS SPECTRUM** (Light/Dim/Dark classification):\n\n| Type | Access Level | Purpose\
      \ |\n|------|--------------|---------|\n| Light Archive (Q112815447) | Broadly accessible | Discovery & use |\n| Dim\
      \ Archive (Q112796779) | Limited access | Selective access |\n| **Dark Archive** | No current access | Preservation\
      \ only |\n\n**COMMON USE CASES**:\n\n1. **Digital Preservation**\n   - Trusted Digital Repositories (TDR)\n   - Backup/disaster\
      \ recovery copies\n   - Integrity verification archives\n\n2. **Rights-Restricted Content**\n   - Orphan works awaiting\
      \ rights clearance\n   - Embargoed materials\n   - Donor restrictions (sealed for X years)\n\n3. **Sensitive Materials**\n\
      \   - Security-classified records\n   - Privacy-protected personal data\n   - Legally sealed court records\n\n4. **Format\
      \ Migration**\n   - Source materials preserved after migration\n   - Original files kept for verification\n\n**TRIGGER\
      \ EVENTS** (when dark becomes accessible):\n- Expiration of embargo period\n- Rights clearance obtained\n- Donor permission\
      \ 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: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:RightsStatus` to document access restrictions\n- `premis:endDate` for embargo expiration dates\n\
      - `premis:Agent` to identify the responsible custodian\n"
    slot_usage:
      has_or_had_identifier:  # was: wikidata_entity - migrated per Rule 53 (2026-01-15)
        # equals_string removed: Q112796578 (incompatible with uriorcurie range)
      has_or_had_access_trigger_event:
        range: string
        multivalued: true
        examples:
        - value:
          - embargo_expiration
          - rights_clearance
          - disaster_recovery
      embargo_end_date:
        range: date
        examples:
        - value: '2050-01-01'
          description: 50-year embargo ending
      preservation_purpose:
        range: string
        examples:
        - value: disaster_recovery
        - value: rights_pending
        - value: donor_restriction
      refers_to_access_policy:
        range: AccessPolicy
        required: true
      has_or_had_custodian_type:
        equals_expression: '["hc:ArchiveOrganizationType"]'
    exact_mappings:
    - wd:Q112796578
    close_mappings:
    - premis:RightsStatus
    - rico:RecordSet
    - skos:Concept
    broad_mappings:
    - wd:Q166118
    related_mappings:
    - wikidata:Q112815447
    - wikidata:Q112796779
    comments:
    - Dark archives preserve materials with NO current access
    - Access may be triggered by future events (embargo end, rights clearance)
    - Common for digital preservation, disaster recovery, rights-pending content
    - Part of Light/Dim/Dark access spectrum classification
    - PREMIS metadata used for preservation and rights documentation
    see_also:
    - https://www.wikidata.org/wiki/Q112796578
    - http://www.loc.gov/premis/
    examples:
    - value:
        type_id: https://nde.nl/ontology/hc/type/archive/Q112796578
        glamorcubesfixphdnt_code: ARCHIVE
        has_or_had_identifier: Q112796578  # was: wikidata_entity - migrated per Rule 53 (2026-01-16)
        type_label:
        - Dark Archive@en
        - Dark Archive@de
        has_or_had_description: Collection preserved for future use with no current access  # was: type_description - migrated per Rule 53/56 (2026-01-16)
        preservation_purpose: disaster_recovery
        has_or_had_access_trigger_event:
        - primary_system_failure
        - disaster_declaration
        refers_to_access_policy:
          policy_id: https://nde.nl/ontology/hc/policy/dark-archive-dr
          access_level: CLOSED
          restriction_reason: Disaster recovery copy - access on system failure only
      description: Disaster recovery dark archive
    - value:
        type_id: https://nde.nl/ontology/hc/type/archive/Q112796578-embargo
        glamorcubesfixphdnt_code: ARCHIVE
        has_or_had_identifier: Q112796578  # was: wikidata_entity - migrated per Rule 53 (2026-01-16)
        type_label:
        - Embargoed Dark Archive@en
        has_or_had_description: Materials under embargo with future access date  # was: type_description - migrated per Rule 53/56 (2026-01-16)
        preservation_purpose: donor_restriction
        embargo_end_date: '2050-01-01'
        has_or_had_access_trigger_event:
        - embargo_expiration
        refers_to_access_policy:
          policy_id: https://nde.nl/ontology/hc/policy/embargo-50yr
          access_level: CLOSED
          restriction_reason: Donor restriction - 50 year embargo
      description: Embargoed materials dark archive