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:
  - ../classes/AgentType
  - linkml:types
  - ../slots/20260202_matang/embargo
  - ../slots/20260202_matang/identified_by
  - ../slots/20260202_matang/has_scope
  - ../slots/20260202_matang/has_score
  - ../slots/20260202_matang/has_type
  - ../slots/20260202_matang/new/hold_or_held_record_set_type
  - ../slots/20260202_matang/new/preservation_purpose
  - ../slots/20260202_matang/new/refers_to_access_policy
classes:
  DarkArchive:
    is_a: CustodianType
    class_uri: schema:ArchiveOrganization
    slots:
    - has_type
    - has_embargo_end_date
    - hold_or_held_record_set_type
    - preservation_purpose
    - refers_to_access_policy
    - has_score
    - identified_by
    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\n\
      Dark 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:
      identified_by: null
      has_embargo_end_date:
        range: date
        examples:
        - value: '2050-01-01'
      preservation_purpose:
#         range: string
        examples:
        - value: disaster_recovery
        - value: rights_pending
        - value: donor_restriction
      refers_to_access_policy:
        range: AccessPolicy
        required: true
      has_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:
        identified_by: https://nde.nl/ontology/hc/type/archive/Q112796578
        has_type_code: ARCHIVE
        has_label:
        - Dark Archive@en
        - Dark Archive@de
        has_description: Collection preserved for future use with no current access
        preservation_purpose: disaster_recovery
        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
    - value:
        identified_by: https://nde.nl/ontology/hc/type/archive/Q112796578-embargo
        has_type_code: ARCHIVE
        has_label:
        - Embargoed Dark Archive@en
        has_description: Materials under embargo with future access date
        preservation_purpose: donor_restriction
        has_embargo_end_date: '2050-01-01'
        refers_to_access_policy:
          policy_id: https://nde.nl/ontology/hc/policy/embargo-50yr
          access_level: CLOSED
          restriction_reason: Donor restriction - 50 year embargo
    annotations:
      specificity_score: 0.1
      specificity_rationale: Generic utility class/slot created during migration
      custodian_types: "['*']"