{
  "vercy": "1.0-draft",
  "publication": {
    "status": "research-draft",
    "adjudicationStatus": "unreviewed",
    "publishableCanonical": false,
    "generatedAt": "2026-09-11T06:37:34Z",
    "providers": [
      "Claude"
    ],
    "breadth": "written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify",
    "pass": 2,
    "wave": 1,
    "engine": "claude",
    "enrichment": {
      "pass": 3,
      "engine": "claude",
      "producedAt": "2026-10-05T16:30:00Z",
      "ingestedAt": "2026-10-05T13:21:37+00:00",
      "fields": [
        "agent_conduct",
        "ethics",
        "owners"
      ]
    },
    "gate": {
      "passed": true,
      "version": "1.0",
      "at": "2026-10-06T19:52:00+00:00",
      "evidence": [
        "completeness 1.00",
        "sense: Wikidata description",
        "2 live sources",
        "review by codex: pass"
      ]
    }
  },
  "metaModel": {
    "id": "THING-Q47574",
    "registryId": "vr.tr.unit-of-measurement",
    "name": "unit of measurement",
    "version": "0.2.0-wave.1",
    "entryKind": "thing",
    "family": "Thing Registry",
    "domain": [
      "XCT.QLT"
    ],
    "status": "research-draft"
  },
  "canonicalUrl": "https://ver.cy/models/thing/q47574/",
  "model": {
    "registry_id": "vr.tr.unit-of-measurement",
    "name": "unit of measurement",
    "purpose": "Let an agent handle units by quantity, system, definition and conversion, and never report a number without a unit.",
    "definition": "A definite magnitude of a quantity, defined and adopted by convention, used as a standard for measurement, such as the metre, kilogram, second or pharmacopoeia units.",
    "what_it_is_for": "Making measurements comparable.",
    "affordances": [
      "convert between units",
      "check dimensional consistency",
      "choose appropriate units",
      "trace units to definitions"
    ],
    "distinguishing_features": [
      "Standard magnitude of a quantity",
      "Organised in systems",
      "SI is the international system",
      "Some units are domain-specific"
    ],
    "appearance": "Symbols such as m, kg, s, and names on instruments and labels.",
    "visual_identification": [
      "Unit symbols and names",
      "Systems: SI, imperial, US customary",
      "Special units such as USP units"
    ],
    "physical_properties": [],
    "families_and_kinds": [
      "SI base and derived units",
      "non-SI units accepted with SI",
      "imperial and US customary units",
      "domain units such as pharmacopoeia units"
    ],
    "related_models": [
      {
        "relation": "measures",
        "target": "physical quantity",
        "why": "quantity"
      },
      {
        "relation": "has kind",
        "target": "hand, cup, cable",
        "why": "units"
      },
      {
        "relation": "is defined by",
        "target": "SI",
        "why": "system"
      },
      {
        "relation": "is used in",
        "target": "measurement",
        "why": "practice"
      }
    ],
    "identifiers": [
      {
        "scheme": "UCUM code",
        "value_or_pattern": "code strings",
        "note": "machine-readable units"
      },
      {
        "scheme": "QUDT unit IRI",
        "value_or_pattern": "URI",
        "note": "semantic units"
      }
    ],
    "standards_and_regulation": [
      "SI Brochure",
      "ISO 80000",
      "Legal metrology law"
    ],
    "failure_modes_and_hazards": [
      "Unit conversion errors",
      "Missing units",
      "Confusing similar units"
    ],
    "in_scope": [],
    "out_of_scope": [],
    "characteristics": [],
    "agent_conduct": {
      "may": [
        "Convert between units using defined factors and state the units used.",
        "Check that values carry the correct units."
      ],
      "must_not": [
        "Mix units in calculations without converting them.",
        "Present an obsolete or local unit as standard.",
        "Round or convert doses or loads in a way that changes their safety."
      ],
      "requires_human": [
        "Changing the units used in medical, engineering or legal measurements."
      ]
    },
    "ethics": {
      "considerations": [
        "Unit errors have caused medication overdoses, structural failures and lost spacecraft.",
        "Fair trade depends on honest measures."
      ],
      "affected_parties": [
        "Patients and users of measured products",
        "Engineers and traders"
      ]
    },
    "owners": {
      "steward": "Nobody: a convention; the international system of units is maintained by the international bureau of weights and measures.",
      "master_systems": [
        "The International System of Units"
      ]
    }
  },
  "sources": [
    {
      "id": "wikidata",
      "title": "Wikidata item Q47574: unit of measurement",
      "url": "https://www.wikidata.org/wiki/Q47574",
      "url_status": "live",
      "what_it_supports": "identity and sense of the item",
      "checked_by": "wikidata-api"
    },
    {
      "id": "wikipedia-en",
      "title": "Wikipedia: Unit of measurement",
      "url": "https://en.wikipedia.org/wiki/Unit_of_measurement",
      "url_status": "live",
      "what_it_supports": "general description of the item",
      "checked_by": "wikidata-api sitelink"
    }
  ],
  "structure": {
    "bundles": [
      {
        "id": "definition",
        "name": "Definition",
        "description": "Which unit.",
        "rationale": "Units need definitions.",
        "layers": [
          {
            "id": "unit",
            "name": "Unit",
            "description": "Name and symbol.",
            "findings": [
              {
                "id": "unit-finding",
                "name": "Unit",
                "description": "Unit identity.",
                "questions": [
                  {
                    "text": "Which unit, with which symbol?",
                    "kind": "definition"
                  },
                  {
                    "text": "What quantity does it measure?",
                    "kind": "definition"
                  }
                ]
              }
            ]
          },
          {
            "id": "system",
            "name": "System",
            "description": "SI or other.",
            "findings": [
              {
                "id": "system-finding",
                "name": "System",
                "description": "Unit system.",
                "questions": [
                  {
                    "text": "Which system does it belong to?",
                    "kind": "definition"
                  },
                  {
                    "text": "How is it defined?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "conversion",
        "name": "Conversion",
        "description": "Between units.",
        "rationale": "Conversions must be exact.",
        "layers": [
          {
            "id": "factor",
            "name": "Factor",
            "description": "Exact factor.",
            "findings": [
              {
                "id": "factor-finding",
                "name": "Factor",
                "description": "Conversion factor.",
                "questions": [
                  {
                    "text": "What is the exact factor to SI?",
                    "kind": "measurement"
                  },
                  {
                    "text": "Is it exact or approximate?",
                    "kind": "boundary"
                  }
                ]
              }
            ]
          },
          {
            "id": "consistency",
            "name": "Consistency",
            "description": "Dimensions.",
            "findings": [
              {
                "id": "consistency-finding",
                "name": "Consistency",
                "description": "Dimensional check.",
                "questions": [
                  {
                    "text": "Are units consistent in the calculation?",
                    "kind": "boundary"
                  },
                  {
                    "text": "What checks catch errors?",
                    "kind": "action"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "use",
        "name": "Use",
        "description": "Choosing units.",
        "rationale": "Choice affects clarity.",
        "layers": [
          {
            "id": "choice",
            "name": "Choice",
            "description": "Appropriate units.",
            "findings": [
              {
                "id": "choice-finding",
                "name": "Choice",
                "description": "Unit choice.",
                "questions": [
                  {
                    "text": "Which unit suits this audience and context?",
                    "kind": "action"
                  },
                  {
                    "text": "Is a legal unit required?",
                    "kind": "boundary"
                  }
                ]
              }
            ]
          },
          {
            "id": "machine",
            "name": "Machine-readable",
            "description": "Codes.",
            "findings": [
              {
                "id": "machine-finding",
                "name": "Machine",
                "description": "Unit codes.",
                "questions": [
                  {
                    "text": "Which UCUM or QUDT code represents it?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Is it used consistently?",
                    "kind": "boundary"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "safety",
        "name": "Safety",
        "description": "Critical errors.",
        "rationale": "Unit errors can be dangerous.",
        "layers": [
          {
            "id": "medicine",
            "name": "Medicine",
            "description": "Dose units.",
            "findings": [
              {
                "id": "medicine-finding",
                "name": "Medicine",
                "description": "Dose units.",
                "questions": [
                  {
                    "text": "Are dose units clear, avoiding error-prone abbreviations?",
                    "kind": "boundary"
                  },
                  {
                    "text": "Which guidance applies?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          },
          {
            "id": "engineering",
            "name": "Engineering",
            "description": "Design errors.",
            "findings": [
              {
                "id": "engineering-finding",
                "name": "Engineering",
                "description": "Engineering checks.",
                "questions": [
                  {
                    "text": "Could a unit error cause a failure here?",
                    "kind": "boundary"
                  },
                  {
                    "text": "How is it prevented?",
                    "kind": "action"
                  }
                ]
              }
            ]
          }
        ]
      }
    ]
  },
  "openQuestions": [
    "Should units be instances with UCUM codes?",
    "How should non-SI units be linked?",
    "The registry entry has merged aliases such as look; should they be removed?"
  ],
  "statistics": {
    "bundles": 4,
    "layers": 8,
    "findings": 8,
    "questions": 16
  }
}