{
  "vercy": "1.0-draft",
  "publication": {
    "status": "research-draft",
    "adjudicationStatus": "unreviewed",
    "publishableCanonical": false,
    "generatedAt": "2026-09-12T05:47:46Z",
    "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": 2,
    "engine": "claude",
    "enrichment": {
      "pass": 3,
      "engine": "claude",
      "producedAt": "2026-10-05T23:50:00Z",
      "ingestedAt": "2026-10-05T20:54:12+00:00",
      "fields": [
        "agent_conduct",
        "ethics",
        "owners"
      ]
    },
    "gate": {
      "passed": true,
      "version": "1.0",
      "at": "2026-10-07T12:16:27+00:00",
      "evidence": [
        "completeness 1.00",
        "sense: WordNet gloss",
        "2 live sources",
        "review by codex: pass"
      ]
    }
  },
  "metaModel": {
    "id": "THING-CHAIN-QUANTITY",
    "registryId": "vr.tr.chain-quantity",
    "name": "chain",
    "version": "0.2.0-wave.2",
    "entryKind": "thing",
    "family": "Thing Registry",
    "domain": [
      "XCT.QTY"
    ],
    "status": "research-draft"
  },
  "canonicalUrl": "https://ver.cy/models/thing/chain-quantity/",
  "model": {
    "registry_id": "vr.tr.chain-quantity",
    "name": "chain",
    "purpose": "Let an agent explain the chain as a unit of length and its variants, support conversions to feet, metres and related units, describe its role in surveying and land records, and support historical measurement questions.",
    "definition": "A unit of length used historically in land surveying, the surveyor or Gunter chain of sixty-six feet divided into one hundred links, of which eighty make a mile and ten square chains make an acre, together with variants such as the engineer or Ramsden chain of one hundred feet and the nautical chain of fifteen feet; the chain shaped land division and railway measurement in English-speaking countries and survives in property records, railway mileposts and sports fields.",
    "what_it_is_for": "Surveying unit of length.",
    "affordances": [
      "explain the unit and variants",
      "support conversions",
      "describe surveying role",
      "support historical questions"
    ],
    "distinguishing_features": [
      "Decimal links",
      "Acre relation",
      "Surveying origin",
      "Variants by field"
    ],
    "appearance": "Not physical as a unit; historically a physical measuring chain.",
    "visual_identification": [
      "Sixty-six feet, one hundred links",
      "Surveyor, engineer and nautical chains",
      "The rod is a quarter chain; the furlong is ten chains; the mile is eighty chains"
    ],
    "physical_properties": [],
    "families_and_kinds": [
      "surveyor or Gunter chain",
      "engineer or Ramsden chain",
      "nautical chain",
      "chain as a physical instrument",
      "chains in railway and sports measurement"
    ],
    "related_models": [
      {
        "relation": "is a kind of",
        "target": "unit of length",
        "why": "category"
      },
      {
        "relation": "is related to",
        "target": "hundredweight",
        "why": "another traditional unit entry"
      },
      {
        "relation": "is related to",
        "target": "boundary",
        "why": "boundaries measured in chains"
      },
      {
        "relation": "is related to",
        "target": "arable land",
        "why": "land measured in acres derived from chains"
      }
    ],
    "identifiers": [],
    "standards_and_regulation": [
      "Historical weights and measures legislation",
      "Land survey conventions",
      "Metrication policies"
    ],
    "failure_modes_and_hazards": [
      "Confusing chain variants",
      "Conversion errors",
      "Confusing the unit with the physical chain or other senses"
    ],
    "in_scope": [],
    "out_of_scope": [],
    "characteristics": [],
    "agent_conduct": {
      "may": [
        "Explain the surveyor's chain and its variants.",
        "Convert chains to feet, metres, links and acres, stating which chain is meant.",
        "Interpret historic survey records that use chains."
      ],
      "must_not": [
        "Convert without saying which chain variant was assumed.",
        "Confuse the unit with a physical chain or other senses of the word.",
        "Present a converted historic boundary as a legal survey.",
        "Round conversions in a way that changes a property area."
      ],
      "requires_human": [
        "Using a converted historic measurement to settle a boundary or land dispute."
      ]
    },
    "ethics": {
      "considerations": [
        "Old land records in chains still define boundaries; errors affect property rights.",
        "Cricket pitches and railways still use the chain; clarity avoids confusion."
      ],
      "affected_parties": [
        "Landowners",
        "Surveyors",
        "Historians"
      ]
    },
    "owners": {
      "steward": "Nobody: a unit held in common; national measurement bodies define legal units.",
      "master_systems": []
    }
  },
  "sources": [
    {
      "id": "oewn",
      "title": "Open English WordNet 2024, synset oewn-13674612-n",
      "url": "https://en-word.net/id/oewn-13674612-n",
      "what_it_supports": "sense and gloss of the concept",
      "url_status": "live",
      "checked_by": "http 200"
    },
    {
      "id": "wiktionary-en",
      "title": "Wiktionary: chain",
      "url": "https://en.wiktionary.org/wiki/chain",
      "what_it_supports": "word senses and usage",
      "url_status": "live",
      "checked_by": "http 200"
    }
  ],
  "structure": {
    "bundles": [
      {
        "id": "understand",
        "name": "Understand",
        "description": "What the chain is.",
        "rationale": "Metrology.",
        "layers": [
          {
            "id": "concept",
            "name": "Concept",
            "description": "Definition and variants.",
            "findings": [
              {
                "id": "concept-finding",
                "name": "Concept",
                "description": "Concept.",
                "questions": [
                  {
                    "text": "What is the chain as a unit, and how do surveyor, engineer and nautical chains differ?",
                    "kind": "definition"
                  },
                  {
                    "text": "Which variant or sense is meant?",
                    "kind": "boundary"
                  }
                ]
              }
            ]
          },
          {
            "id": "relations",
            "name": "Relations",
            "description": "Relations to other units.",
            "findings": [
              {
                "id": "relations-finding",
                "name": "Relations",
                "description": "Relations.",
                "questions": [
                  {
                    "text": "How does the chain relate to links, rods, furlongs, miles, acres and metres?",
                    "kind": "definition"
                  },
                  {
                    "text": "Which entry fits the imperial system?",
                    "kind": "action"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "convert",
        "name": "Convert",
        "description": "Conversion and use.",
        "rationale": "Practice.",
        "layers": [
          {
            "id": "convert",
            "name": "Convert",
            "description": "Converting.",
            "findings": [
              {
                "id": "convert-finding",
                "name": "Convert",
                "description": "Conversion.",
                "questions": [
                  {
                    "text": "How can this length be converted between chains, feet and metres?",
                    "kind": "action"
                  },
                  {
                    "text": "Which units apply?",
                    "kind": "measurement"
                  }
                ]
              }
            ]
          },
          {
            "id": "records",
            "name": "Records",
            "description": "Reading records.",
            "findings": [
              {
                "id": "records-finding",
                "name": "Records",
                "description": "Records.",
                "questions": [
                  {
                    "text": "How should chains and links in old survey plans and deeds be interpreted?",
                    "kind": "action"
                  },
                  {
                    "text": "Which entry fits land surveying?",
                    "kind": "action"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "history",
        "name": "History",
        "description": "History and legacy.",
        "rationale": "Scholarship.",
        "layers": [
          {
            "id": "surveying",
            "name": "Surveying",
            "description": "Surveying history.",
            "findings": [
              {
                "id": "surveying-finding",
                "name": "Surveying",
                "description": "Surveying.",
                "questions": [
                  {
                    "text": "How did Gunter chain shape land division and surveying in English-speaking countries?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which entry fits the history of surveying?",
                    "kind": "action"
                  }
                ]
              }
            ]
          },
          {
            "id": "legacy",
            "name": "Legacy",
            "description": "Modern legacy.",
            "findings": [
              {
                "id": "legacy-finding",
                "name": "Legacy",
                "description": "Legacy.",
                "questions": [
                  {
                    "text": "Where does the chain survive today, in railways, sports fields and property records?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which references are standard?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "learn",
        "name": "Learn",
        "description": "Teaching.",
        "rationale": "Education.",
        "layers": [
          {
            "id": "teach",
            "name": "Teach",
            "description": "Teaching.",
            "findings": [
              {
                "id": "teach-finding",
                "name": "Teach",
                "description": "Teaching.",
                "questions": [
                  {
                    "text": "How can historical units like the chain be taught?",
                    "kind": "action"
                  },
                  {
                    "text": "Which misconceptions arise?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          },
          {
            "id": "instrument",
            "name": "Instrument",
            "description": "The physical chain.",
            "findings": [
              {
                "id": "instrument-finding",
                "name": "Instrument",
                "description": "Instrument.",
                "questions": [
                  {
                    "text": "How was the physical measuring chain made and used in the field?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which entry fits surveying instruments?",
                    "kind": "action"
                  }
                ]
              }
            ]
          }
        ]
      }
    ]
  },
  "openQuestions": [
    "Should the Gunter chain be a separate entry?",
    "How should survey records be linked?",
    "How should historical metrology resources be linked?"
  ],
  "statistics": {
    "bundles": 4,
    "layers": 8,
    "findings": 8,
    "questions": 16
  }
}