{
  "registry_version": "2.0.0",
  "status": "canonical-approved",
  "approved_on": "2026-10-11",
  "purpose": "Canonical ordered keyword grammar for the DIO/ODI corpus. It stabilizes lexical identity, preserves conceptual structure, and provides deterministic keyword projections for Zenodo and other metadata surfaces.",
  "principles": [
    "Keywords are an ordered metadata grammar, not an unordered bag of tags.",
    "Chunk order is invariant across the corpus.",
    "The identity invariant is always first.",
    "The reconstruction-environment block is always second.",
    "Within master chunks, selected terms retain the same relative order across works.",
    "K6 is exported as a complete ordered block or not exported at all.",
    "Work-specific positioning terms occupy C2 and may vary by work.",
    "Aliases support recognition but are not exported by default.",
    "Keyword assignment must not retroactively project concepts into a work that the work does not substantively carry."
  ],
  "export_policy": {
    "approved": true,
    "chunk_order": [
      "C0_identity_invariant",
      "C1_reconstruction_environments",
      "C2_work_positioning",
      "C3_reconstruction_mechanics",
      "C4_k6",
      "C5_failures_robustness",
      "C6_machine_readable_representation"
    ],
    "flattening_rule": "Concatenate active chunks in chunk_order; preserve term order inside each chunk; omit inactive terms; deduplicate case-insensitively without reordering.",
    "aliases_are_for_reconstruction_not_export": true
  },
  "chunks": {
    "C0_identity_invariant": {
      "order": 0,
      "label": "Identity invariant",
      "scope": "global",
      "terms": [
        "Digital Identity Optimization",
        "DIO",
        "Ontology of Digital Identity",
        "ODI",
        "digital identity",
        "identity reconstruction"
      ]
    },
    "C1_reconstruction_environments": {
      "order": 1,
      "label": "Reconstruction environments",
      "scope": "global",
      "terms": [
        "artificial intelligence",
        "search engines",
        "knowledge graphs",
        "human observers"
      ]
    },
    "C2_work_positioning": {
      "order": 2,
      "label": "Work positioning",
      "scope": "work-specific",
      "terms": []
    },
    "C3_reconstruction_mechanics": {
      "order": 3,
      "label": "Reconstruction mechanics",
      "scope": "selective-master-order",
      "terms": [
        "semantic field",
        "distributed representational state",
        "observation domain",
        "observer",
        "reconstruction mechanism",
        "identity-preserving constraints",
        "identity-preserving variation",
        "referential continuity",
        "semantic coherence"
      ]
    },
    "C4_k6": {
      "order": 4,
      "label": "K6 Semantic Connectome",
      "scope": "all-or-nothing",
      "terms": [
        "K6 Semantic Connectome",
        "Entity",
        "Representation",
        "Interpretation",
        "Trust",
        "Relationship",
        "Reconstruction"
      ]
    },
    "C5_failures_robustness": {
      "order": 5,
      "label": "Reconstruction failures and robustness",
      "scope": "selective-master-order",
      "terms": [
        "entity resolution",
        "Reconstruction Failure Modes",
        "Referential Reconstruction Failures",
        "Entity Substitution",
        "Merge Failure",
        "Split Failure",
        "Entity Omission",
        "Semantic Coherence Failures",
        "Semantic Fragmentation",
        "Temporal Reconstruction Failures",
        "Temporal Discontinuity",
        "Temporal Misalignment",
        "Contextual Adequacy Failures",
        "Contextual Displacement",
        "Identity Collapse",
        "Semantic Vulnerability",
        "Semantic Robustness",
        "Reconstruction Capture"
      ]
    },
    "C6_machine_readable_representation": {
      "order": 6,
      "label": "Machine-readable and formal representation",
      "scope": "selective-master-order",
      "terms": [
        "SKOS",
        "RDF",
        "JSON-LD",
        "semantic web",
        "linked data",
        "knowledge representation",
        "semantic interoperability",
        "provenance",
        "stable concept URIs"
      ]
    }
  },
  "aliases": [
    {
      "canonical": "Digital Identity Optimization",
      "values": [
        "digital identity optimization",
        "Digital Identity Optimisation"
      ],
      "export": false
    },
    {
      "canonical": "Ontology of Digital Identity",
      "values": [
        "ontology of digital identity"
      ],
      "export": false
    },
    {
      "canonical": "identity reconstruction",
      "values": [
        "Identity Reconstruction"
      ],
      "export": false
    }
  ],
  "work_profiles": {
    "manifest-v1": {
      "chunks": {
        "C0_identity_invariant": "all",
        "C1_reconstruction_environments": "all",
        "C2_work_positioning": [],
        "C3_reconstruction_mechanics": [
          "semantic coherence"
        ],
        "C4_k6": "none",
        "C5_failures_robustness": [],
        "C6_machine_readable_representation": []
      },
      "resolved_keywords": [
        "Digital Identity Optimization",
        "DIO",
        "Ontology of Digital Identity",
        "ODI",
        "digital identity",
        "identity reconstruction",
        "artificial intelligence",
        "search engines",
        "knowledge graphs",
        "human observers",
        "semantic coherence"
      ]
    },
    "manifest-v2-web": {
      "chunks": {
        "C0_identity_invariant": "all",
        "C1_reconstruction_environments": "all",
        "C2_work_positioning": [],
        "C3_reconstruction_mechanics": [
          "semantic field",
          "semantic coherence"
        ],
        "C4_k6": "all",
        "C5_failures_robustness": [
          "Semantic Vulnerability",
          "Semantic Robustness"
        ],
        "C6_machine_readable_representation": []
      },
      "resolved_keywords": [
        "Digital Identity Optimization",
        "DIO",
        "Ontology of Digital Identity",
        "ODI",
        "digital identity",
        "identity reconstruction",
        "artificial intelligence",
        "search engines",
        "knowledge graphs",
        "human observers",
        "semantic field",
        "semantic coherence",
        "K6 Semantic Connectome",
        "Entity",
        "Representation",
        "Interpretation",
        "Trust",
        "Relationship",
        "Reconstruction",
        "Semantic Vulnerability",
        "Semantic Robustness"
      ]
    },
    "dio-conceptual-framework": {
      "chunks": {
        "C0_identity_invariant": "all",
        "C1_reconstruction_environments": "all",
        "C2_work_positioning": [
          "entity-based visibility",
          "AI-mediated search"
        ],
        "C3_reconstruction_mechanics": [
          "semantic coherence"
        ],
        "C4_k6": "none",
        "C5_failures_robustness": [
          "entity resolution"
        ],
        "C6_machine_readable_representation": []
      },
      "resolved_keywords": [
        "Digital Identity Optimization",
        "DIO",
        "Ontology of Digital Identity",
        "ODI",
        "digital identity",
        "identity reconstruction",
        "artificial intelligence",
        "search engines",
        "knowledge graphs",
        "human observers",
        "entity-based visibility",
        "AI-mediated search",
        "semantic coherence",
        "entity resolution"
      ]
    },
    "crisis-entity-resolution": {
      "chunks": {
        "C0_identity_invariant": "all",
        "C1_reconstruction_environments": "all",
        "C2_work_positioning": [
          "heterogeneous AI environments",
          "data heterogeneity",
          "semantic heterogeneity"
        ],
        "C3_reconstruction_mechanics": [
          "semantic coherence"
        ],
        "C4_k6": "none",
        "C5_failures_robustness": [
          "entity resolution",
          "Semantic Fragmentation",
          "Temporal Discontinuity",
          "Identity Collapse",
          "Semantic Vulnerability"
        ],
        "C6_machine_readable_representation": []
      },
      "resolved_keywords": [
        "Digital Identity Optimization",
        "DIO",
        "Ontology of Digital Identity",
        "ODI",
        "digital identity",
        "identity reconstruction",
        "artificial intelligence",
        "search engines",
        "knowledge graphs",
        "human observers",
        "heterogeneous AI environments",
        "data heterogeneity",
        "semantic heterogeneity",
        "semantic coherence",
        "entity resolution",
        "Semantic Fragmentation",
        "Temporal Discontinuity",
        "Identity Collapse",
        "Semantic Vulnerability"
      ]
    },
    "mvdio": {
      "chunks": {
        "C0_identity_invariant": "all",
        "C1_reconstruction_environments": "all",
        "C2_work_positioning": [
          "Minimum Viable DIO",
          "adversarial reduction",
          "semantic field dynamics"
        ],
        "C3_reconstruction_mechanics": "all",
        "C4_k6": "all",
        "C5_failures_robustness": [
          "entity resolution",
          "Merge Failure",
          "Split Failure",
          "Semantic Fragmentation",
          "Temporal Discontinuity",
          "Temporal Misalignment",
          "Contextual Displacement",
          "Identity Collapse",
          "Semantic Vulnerability",
          "Semantic Robustness",
          "Reconstruction Capture"
        ],
        "C6_machine_readable_representation": []
      },
      "resolved_keywords": [
        "Digital Identity Optimization",
        "DIO",
        "Ontology of Digital Identity",
        "ODI",
        "digital identity",
        "identity reconstruction",
        "artificial intelligence",
        "search engines",
        "knowledge graphs",
        "human observers",
        "Minimum Viable DIO",
        "adversarial reduction",
        "semantic field dynamics",
        "semantic field",
        "distributed representational state",
        "observation domain",
        "observer",
        "reconstruction mechanism",
        "identity-preserving constraints",
        "identity-preserving variation",
        "referential continuity",
        "semantic coherence",
        "K6 Semantic Connectome",
        "Entity",
        "Representation",
        "Interpretation",
        "Trust",
        "Relationship",
        "Reconstruction",
        "entity resolution",
        "Merge Failure",
        "Split Failure",
        "Semantic Fragmentation",
        "Temporal Discontinuity",
        "Temporal Misalignment",
        "Contextual Displacement",
        "Identity Collapse",
        "Semantic Vulnerability",
        "Semantic Robustness",
        "Reconstruction Capture"
      ]
    },
    "taxonomic-note": {
      "chunks": {
        "C0_identity_invariant": "all",
        "C1_reconstruction_environments": "all",
        "C2_work_positioning": [
          "entity resolution anomalies"
        ],
        "C3_reconstruction_mechanics": [
          "identity-preserving constraints",
          "referential continuity",
          "semantic coherence"
        ],
        "C4_k6": "none",
        "C5_failures_robustness": [
          "entity resolution",
          "Reconstruction Failure Modes",
          "Referential Reconstruction Failures",
          "Entity Substitution",
          "Merge Failure",
          "Split Failure",
          "Entity Omission",
          "Semantic Coherence Failures",
          "Semantic Fragmentation",
          "Temporal Reconstruction Failures",
          "Temporal Discontinuity",
          "Temporal Misalignment",
          "Contextual Adequacy Failures",
          "Contextual Displacement",
          "Identity Collapse",
          "Semantic Vulnerability",
          "Semantic Robustness"
        ],
        "C6_machine_readable_representation": []
      },
      "resolved_keywords": [
        "Digital Identity Optimization",
        "DIO",
        "Ontology of Digital Identity",
        "ODI",
        "digital identity",
        "identity reconstruction",
        "artificial intelligence",
        "search engines",
        "knowledge graphs",
        "human observers",
        "entity resolution anomalies",
        "identity-preserving constraints",
        "referential continuity",
        "semantic coherence",
        "entity resolution",
        "Reconstruction Failure Modes",
        "Referential Reconstruction Failures",
        "Entity Substitution",
        "Merge Failure",
        "Split Failure",
        "Entity Omission",
        "Semantic Coherence Failures",
        "Semantic Fragmentation",
        "Temporal Reconstruction Failures",
        "Temporal Discontinuity",
        "Temporal Misalignment",
        "Contextual Adequacy Failures",
        "Contextual Displacement",
        "Identity Collapse",
        "Semantic Vulnerability",
        "Semantic Robustness"
      ]
    },
    "reference-model": {
      "chunks": {
        "C0_identity_invariant": "all",
        "C1_reconstruction_environments": "all",
        "C2_work_positioning": [
          "Reference Vocabulary",
          "Application Mapping",
          "retrieval-augmented generation",
          "RAG",
          "heterogeneous entity matching",
          "HEM"
        ],
        "C3_reconstruction_mechanics": "all",
        "C4_k6": "all",
        "C5_failures_robustness": "all",
        "C6_machine_readable_representation": "all"
      },
      "resolved_keywords": [
        "Digital Identity Optimization",
        "DIO",
        "Ontology of Digital Identity",
        "ODI",
        "digital identity",
        "identity reconstruction",
        "artificial intelligence",
        "search engines",
        "knowledge graphs",
        "human observers",
        "Reference Vocabulary",
        "Application Mapping",
        "retrieval-augmented generation",
        "RAG",
        "heterogeneous entity matching",
        "HEM",
        "semantic field",
        "distributed representational state",
        "observation domain",
        "observer",
        "reconstruction mechanism",
        "identity-preserving constraints",
        "identity-preserving variation",
        "referential continuity",
        "semantic coherence",
        "K6 Semantic Connectome",
        "Entity",
        "Representation",
        "Interpretation",
        "Trust",
        "Relationship",
        "Reconstruction",
        "entity resolution",
        "Reconstruction Failure Modes",
        "Referential Reconstruction Failures",
        "Entity Substitution",
        "Merge Failure",
        "Split Failure",
        "Entity Omission",
        "Semantic Coherence Failures",
        "Semantic Fragmentation",
        "Temporal Reconstruction Failures",
        "Temporal Discontinuity",
        "Temporal Misalignment",
        "Contextual Adequacy Failures",
        "Contextual Displacement",
        "Identity Collapse",
        "Semantic Vulnerability",
        "Semantic Robustness",
        "Reconstruction Capture",
        "SKOS",
        "RDF",
        "JSON-LD",
        "semantic web",
        "linked data",
        "knowledge representation",
        "semantic interoperability",
        "provenance",
        "stable concept URIs"
      ]
    }
  },
  "excluded_terms": [
    {
      "term": "digital entity",
      "reason": "Avoids reifying a separate 'digital entity'; DIO distinguishes the entity from its digital identity and distributed representations."
    },
    {
      "term": "machine-readable identity",
      "reason": "Redundant with the intended DIO sense of digital identity."
    },
    {
      "term": "machine interpretation",
      "reason": "Replaced by explicit reconstruction environments and the canonical Interpretation dimension where relevant."
    },
    {
      "term": "AI systems",
      "reason": "Prefer the stable term 'artificial intelligence' in the environment chunk."
    },
    {
      "term": "ontology engineering",
      "reason": "Would overstate the formal ontological status of the current Reference Model."
    },
    {
      "term": "identity graph",
      "reason": "Would overstate the artifact as a graph formalism rather than describe its actual metadata/reference function."
    },
    {
      "term": "semantic identity",
      "reason": "Avoids introducing a new quasi-canonical term not required by the corpus."
    },
    {
      "term": "entity reconstruction",
      "reason": "Avoids competing with the canonical phrase 'identity reconstruction'."
    }
  ]
}
