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/has_or_had_embargo_end_date - ./DarkArchiveRecordSetTypes - ../slots/hold_or_held_record_set_type - ./CollectionType - ../slots/has_or_had_scope - ./Scope - ../slots/has_or_had_type - ../slots/preservation_purpose - ../slots/refers_to_access_policy - ../slots/specificity_annotation - ../slots/has_or_had_score - ../slots/has_or_had_identifier - ./WikiDataIdentifier - ./SpecificityAnnotation - ./TemplateSpecificityScore - ./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_type - has_or_had_embargo_end_date - hold_or_held_record_set_type - preservation_purpose - refers_to_access_policy - specificity_annotation - has_or_had_score - has_or_had_identifier 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: has_or_had_identifier: null has_or_had_access_trigger_event: range: string multivalued: true examples: - value: - embargo_expiration - rights_clearance - disaster_recovery has_or_had_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_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: has_or_had_identifier: https://nde.nl/ontology/hc/type/archive/Q112796578 has_or_had_type_code: ARCHIVE has_or_had_identifier: Q112796578 has_or_had_label: - Dark Archive@en - Dark Archive@de has_or_had_description: Collection preserved for future use with no current access 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: has_or_had_identifier: https://nde.nl/ontology/hc/type/archive/Q112796578-embargo has_or_had_type_code: ARCHIVE has_or_had_identifier: Q112796578 has_or_had_label: - Embargoed Dark Archive@en has_or_had_description: Materials under embargo with future access date preservation_purpose: donor_restriction has_or_had_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 annotations: specificity_score: 0.1 specificity_rationale: Generic utility class/slot created during migration custodian_types: "['*']" custodian_types_rationale: Universal utility concept