{
  "vercy": "1.0-draft",
  "publication": {
    "status": "research-draft",
    "adjudicationStatus": "unreviewed",
    "publishableCanonical": false,
    "generatedAt": "2026-09-11T09:06:37Z",
    "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": "2026-10-05T13:20:29+00:00",
      "fields": [
        "agent_conduct",
        "ethics",
        "owners"
      ]
    },
    "gate": {
      "passed": true,
      "version": "1.0",
      "at": "2026-10-08T19:09:51+00:00",
      "evidence": [
        "completeness 1.00",
        "sense: Wikidata description",
        "2 live sources",
        "review by codex: pass"
      ]
    }
  },
  "metaModel": {
    "id": "THING-Q20650761",
    "registryId": "vr.tr.tender-locomotive",
    "name": "tender locomotive",
    "version": "0.2.0-wave.1",
    "entryKind": "thing",
    "family": "Thing Registry",
    "domain": [
      "PHY.OBJ"
    ],
    "status": "research-draft"
  },
  "canonicalUrl": "https://ver.cy/models/thing/q20650761/",
  "model": {
    "registry_id": "vr.tr.tender-locomotive",
    "name": "tender locomotive",
    "purpose": "Let an agent handle tender locomotives by class, railway, wheel arrangement, preservation and history.",
    "definition": "A steam locomotive that hauls a separate vehicle, the tender, carrying its fuel and water, as opposed to a tank locomotive that carries them on its own frame; many historical classes worldwide.",
    "what_it_is_for": "Long-distance steam haulage; today heritage operation.",
    "affordances": [
      "identify classes and wheel arrangements",
      "find preserved examples",
      "research railway history",
      "ride heritage trains"
    ],
    "distinguishing_features": [
      "Separate fuel and water tender",
      "Longer range than tank engines",
      "Many national classes",
      "Largely heritage today"
    ],
    "appearance": "A steam engine coupled to a separate tender carrying coal or oil and water.",
    "visual_identification": [
      "Separate tender behind the cab",
      "Whyte notation such as 4-6-2",
      "Tank locomotives carry fuel on board"
    ],
    "physical_properties": [
      {
        "quantity": "Operating mass",
        "unit": "t",
        "typical_range": "",
        "note": "Mass is measured or taken from technical records with tender inclusion and fuel and water loading explicitly stated."
      },
      {
        "quantity": "Overall length",
        "unit": "m",
        "typical_range": "",
        "note": "Length is measured between specified end reference points with the locomotive and tender coupled."
      },
      {
        "quantity": "Track gauge",
        "unit": "mm",
        "typical_range": "",
        "note": "Compatible track gauge is specified as the distance between the inner rail faces at the prescribed measurement level."
      },
      {
        "quantity": "Boiler working pressure",
        "unit": "MPa",
        "typical_range": "",
        "note": "Working pressure is obtained from boiler documentation with gauge or absolute pressure explicitly identified."
      },
      {
        "quantity": "Tender water capacity",
        "unit": "m3",
        "typical_range": "",
        "note": "Water capacity is obtained from tender specifications or measured volume with usable and total capacity distinguished."
      }
    ],
    "families_and_kinds": [
      "express passenger tender locomotives",
      "freight tender locomotives",
      "articulated tender locomotives",
      "preserved heritage locomotives"
    ],
    "related_models": [
      {
        "relation": "is a kind of",
        "target": "steam locomotive",
        "why": "category"
      },
      {
        "relation": "is contrasted with",
        "target": "tank locomotive",
        "why": "type"
      },
      {
        "relation": "runs on",
        "target": "railway line",
        "why": "infrastructure"
      },
      {
        "relation": "is preserved by",
        "target": "heritage railways",
        "why": "organisations"
      }
    ],
    "identifiers": [
      {
        "scheme": "class and running number",
        "value_or_pattern": "railway-specific",
        "note": "locomotives"
      },
      {
        "scheme": "Whyte notation",
        "value_or_pattern": "wheel arrangement",
        "note": "classification"
      }
    ],
    "standards_and_regulation": [
      "Heritage railway safety rules",
      "Boiler inspection regulations"
    ],
    "failure_modes_and_hazards": [
      "Boiler failures",
      "Lineside fires from sparks",
      "Burns and scalds in operation"
    ],
    "in_scope": [],
    "out_of_scope": [],
    "characteristics": [],
    "agent_conduct": {
      "may": [
        "Describe tender locomotive classes and history from railway archives.",
        "Report the condition of a preserved locomotive to its operator."
      ],
      "must_not": [
        "Operate, fire or move a steam locomotive without being authorized and qualified.",
        "Tamper with a locomotive's boiler, brakes or safety valves.",
        "Allow people near a live steam locomotive without the operator's supervision.",
        "Remove parts or fittings from a preserved locomotive."
      ],
      "requires_human": [
        "Steaming, moving or coupling a locomotive.",
        "Disposing of or altering a historic locomotive."
      ]
    },
    "ethics": {
      "considerations": [
        "A steam boiler stores great energy and can kill if mishandled.",
        "Preserved locomotives are heritage held for the public."
      ],
      "affected_parties": [
        "Crew and volunteers",
        "Visitors and passengers",
        "Railway heritage"
      ]
    },
    "owners": {
      "steward": "The railway or heritage operator that keeps it; railway safety regulators oversee its operation.",
      "master_systems": [
        "National railway rolling stock and heritage vehicle registers"
      ]
    }
  },
  "sources": [
    {
      "id": "wikidata",
      "title": "Wikidata item Q20650761: tender locomotive",
      "url": "https://www.wikidata.org/wiki/Q20650761",
      "url_status": "live",
      "what_it_supports": "identity and sense of the item",
      "checked_by": "wikidata-api"
    },
    {
      "id": "wikipedia-sv",
      "title": "Wikipedia (sv): Tenderlok",
      "url": "https://sv.wikipedia.org/wiki/Tenderlok",
      "url_status": "live",
      "checked_by": "wikidata-api sitelink",
      "what_it_supports": "general description of the item"
    }
  ],
  "structure": {
    "bundles": [
      {
        "id": "identity",
        "name": "Identity",
        "description": "Which locomotive.",
        "rationale": "Class and number.",
        "layers": [
          {
            "id": "class",
            "name": "Class",
            "description": "Railway class.",
            "findings": [
              {
                "id": "class-finding",
                "name": "Class",
                "description": "Class.",
                "questions": [
                  {
                    "text": "Which class and railway is it?",
                    "kind": "provenance"
                  },
                  {
                    "text": "What is its wheel arrangement?",
                    "kind": "definition"
                  }
                ]
              }
            ]
          },
          {
            "id": "builder",
            "name": "Builder",
            "description": "Manufacturer.",
            "findings": [
              {
                "id": "builder-finding",
                "name": "Builder",
                "description": "Builder.",
                "questions": [
                  {
                    "text": "Who built it and when?",
                    "kind": "provenance"
                  },
                  {
                    "text": "How many were built?",
                    "kind": "measurement"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "technical",
        "name": "Technical",
        "description": "Design.",
        "rationale": "Design determines role.",
        "layers": [
          {
            "id": "specs",
            "name": "Specifications",
            "description": "Performance.",
            "findings": [
              {
                "id": "specs-finding",
                "name": "Specifications",
                "description": "Specifications.",
                "questions": [
                  {
                    "text": "What were its tractive effort and tender capacity?",
                    "kind": "measurement"
                  },
                  {
                    "text": "From which reference?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          },
          {
            "id": "role",
            "name": "Role",
            "description": "Service.",
            "findings": [
              {
                "id": "role-finding",
                "name": "Role",
                "description": "Service role.",
                "questions": [
                  {
                    "text": "Was it used for passenger or freight service?",
                    "kind": "provenance"
                  },
                  {
                    "text": "On which routes?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "heritage",
        "name": "Heritage",
        "description": "Preservation.",
        "rationale": "Many are preserved.",
        "layers": [
          {
            "id": "preserved",
            "name": "Preserved",
            "description": "Examples.",
            "findings": [
              {
                "id": "preserved-finding",
                "name": "Preserved",
                "description": "Preserved examples.",
                "questions": [
                  {
                    "text": "Where are preserved examples, and are any operational?",
                    "kind": "provenance"
                  },
                  {
                    "text": "When do they run?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          },
          {
            "id": "safety",
            "name": "Safety",
            "description": "Boilers and fires.",
            "findings": [
              {
                "id": "safety-finding",
                "name": "Safety",
                "description": "Operational safety.",
                "questions": [
                  {
                    "text": "Is the boiler certificate current?",
                    "kind": "provenance"
                  },
                  {
                    "text": "How is lineside fire risk managed?",
                    "kind": "boundary"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "history",
        "name": "History",
        "description": "Railway history.",
        "rationale": "History needs sources.",
        "layers": [
          {
            "id": "service",
            "name": "Service",
            "description": "Career.",
            "findings": [
              {
                "id": "service-finding",
                "name": "Service",
                "description": "Service history.",
                "questions": [
                  {
                    "text": "What is its documented service history?",
                    "kind": "provenance"
                  },
                  {
                    "text": "When was it withdrawn?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          },
          {
            "id": "models",
            "name": "Models",
            "description": "Scale models.",
            "findings": [
              {
                "id": "models-finding",
                "name": "Models",
                "description": "Scale models.",
                "questions": [
                  {
                    "text": "Which scale models exist?",
                    "kind": "definition"
                  },
                  {
                    "text": "Which references help accuracy?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          }
        ]
      }
    ]
  },
  "openQuestions": [
    "Should classes be separate entries?",
    "How should preserved examples be linked?",
    "How should wheel notations be recorded?"
  ],
  "statistics": {
    "bundles": 4,
    "layers": 8,
    "findings": 8,
    "questions": 16
  }
}