{
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  "acronym": "DDC",
  "name": "Dewey Decimal Classification",
  "category": "society",
  "kind": "vocabulary",
  "description": "The Dewey Decimal Classification (DDC) system, devised by library pioneer Melvil Dewey in the 1870s and owned by OCLC since 1988, provides a dynamic structure for the organization of library collections. Now in its 23rd edition, and available in print and Web versions, the DDC is the world's most widely used library classification system.",
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  "license": "http://rightsstatements.org/vocab/InC/1.0",
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  "usedBy": [],
  "tags": [],
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        "state": "ok",
        "resolvedUrl": "https://www.oclc.org/en/dewey.html",
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        "checkedAt": "2026-10-26T02:50:06.984Z"
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      "download": null
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    "ols": null,
    "obo": null,
    "bioportal": null,
    "citations": [],
    "git": null,
    "tib": null,
    "dashboard": null,
    "quality": null,
    "oops": null,
    "releases": {
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      "from": null
    },
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        "bartoc": "241",
        "wikidata.entity": "Q48460"
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      "appearsIn": [],
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      "deprecated": false,
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    "gross": 11,
    "earned": 9,
    "possible": 80,
    "qualityApplies": false,
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      "score": -5,
      "reason": "no commits, releases or dated files found",
      "steps": [
        {
          "label": "No activity evidence",
          "pts": -5,
          "detail": "no commits, releases or dated files found"
        },
        {
          "label": "Inactive status",
          "pts": 0,
          "detail": "not archived, legacy or inactive"
        }
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    "consistent": null,
    "grade": "E",
    "fair": 9,
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        "max": 12,
        "steps": [
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            "label": "Persistent identifier (F1)",
            "pts": 0,
            "max": 4,
            "detail": "no PURL / w3id / DOI for the artefact"
          },
          {
            "label": "Indexed in services (F4)",
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            "max": 5,
            "detail": "1: Bioregistry"
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          {
            "label": "Citable reference (F2)",
            "pts": 0,
            "max": 3,
            "detail": "no reference publication listed"
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          "Indexed in services (F4): 1: Bioregistry",
          "Citable reference (F2): no reference publication listed"
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        "score": 6,
        "max": 12,
        "steps": [
          {
            "label": "Homepage reachable",
            "pts": 3,
            "max": 3,
            "detail": "HTTP 200"
          },
          {
            "label": "Artefact retrievable over HTTP(S) (A1)",
            "pts": 0,
            "max": 6,
            "detail": "no download or repository listed"
          },
          {
            "label": "Metadata persists in a registry (A2)",
            "pts": 3,
            "max": 3,
            "detail": "Bioregistry"
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        "notes": [
          "Artefact retrievable over HTTP(S) (A1): no download or repository listed"
        ]
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      "interoperable": {
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        "max": 12,
        "steps": [
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            "label": "Formal machine-readable format (I1)",
            "pts": 0,
            "max": 5,
            "detail": "none of: —"
          },
          {
            "label": "Semantic-web IRIs (I2)",
            "pts": 0,
            "max": 3,
            "detail": "no RDF/OWL/JSON-LD representation"
          },
          {
            "label": "References other vocabularies (I3)",
            "pts": 0,
            "max": 4,
            "detail": "no imported vocabularies found"
          }
        ],
        "notes": [
          "Formal machine-readable format (I1): none of: —",
          "Semantic-web IRIs (I2): no RDF/OWL/JSON-LD representation",
          "References other vocabularies (I3): no imported vocabularies found"
        ]
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            "label": "Clear license (R1.1)",
            "pts": 2,
            "max": 5,
            "detail": "http://rightsstatements.org/vocab/InC/1.0 (not a recognised open license)"
          },
          {
            "label": "Release provenance (R1.2)",
            "pts": 0,
            "max": 4,
            "detail": "no version in artefact, registry or release tags"
          },
          {
            "label": "Community standards (R1.3)",
            "pts": 0,
            "max": 3,
            "detail": "no independent compliance report (not on the OBO Dashboard)"
          }
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        "notes": [
          "Clear license (R1.1): http://rightsstatements.org/vocab/InC/1.0 (not a recognised open license)",
          "Release provenance (R1.2): no version in artefact, registry or release tags",
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        ]
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        "steps": [
          {
            "label": "Not applicable",
            "pts": 0,
            "max": 0,
            "detail": "vocabulary without an OWL/OBO/RDF artefact; total scaled from 80 to 100"
          }
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        "applicable": false
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        "steps": [
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            "label": "Recency",
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            "max": 10,
            "detail": "no activity evidence"
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            "label": "Release cadence (12 months)",
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            "detail": "0 releases"
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          "Release cadence (12 months): 0 releases"
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        "steps": [
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            "label": "Documented adopting projects",
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            "max": 7,
            "detail": "0 projects"
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            "label": "Reused by other ontologies",
            "pts": 0,
            "max": 4,
            "detail": "0"
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            "label": "Community signal",
            "pts": 0,
            "max": 5,
            "detail": "max(stars 0 → 0, citations 0 → 0)"
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          "Reused by other ontologies: 0",
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    "adopterCount": 0,
    "reuseCount": 0,
    "importCount": 0,
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    "runId": "2026-10-26T02-37-38Z",
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      "links": {
        "homepage": "ok"
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    "retrievedAt": "2026-10-25T21:49:00Z",
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      "name": "Bioregistry",
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