{
  "vercy": "1.0-draft",
  "publication": {
    "status": "research-draft",
    "adjudicationStatus": "unreviewed",
    "publishableCanonical": false,
    "generatedAt": "2026-09-11T23:44:46Z",
    "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": "2026-10-05T23:45:00Z",
      "ingestedAt": "2026-10-05T20:46:46+00:00",
      "fields": [
        "agent_conduct",
        "ethics",
        "owners"
      ]
    },
    "gate": {
      "passed": true,
      "version": "1.0",
      "at": "2026-10-07T10:10:30+00:00",
      "evidence": [
        "completeness 1.00",
        "sense: Wikidata description",
        "2 live sources",
        "review by codex: pass"
      ]
    }
  },
  "metaModel": {
    "id": "THING-Q3407658",
    "registryId": "vr.tr.tram",
    "name": "tram",
    "version": "0.2.0-wave.2",
    "entryKind": "thing",
    "family": "Thing Registry",
    "domain": [
      "PHY.OBJ"
    ],
    "status": "research-draft"
  },
  "canonicalUrl": "https://ver.cy/models/thing/q3407658/",
  "model": {
    "registry_id": "vr.tr.tram",
    "name": "tram",
    "purpose": "Let an agent explain trams and their kinds, support using tram networks, describe tram technology and history, and relate trams to urban transport planning.",
    "definition": "A rail vehicle that runs on tracks along urban streets or reserved lanes, powered mostly by electricity from overhead wires or batteries, carrying passengers in single or articulated units, also called streetcar or trolley, with variants from historic trams to modern low-floor light rail vehicles, restaurant trams and cable-hauled cars; trams are operated by transit agencies under rail and road rules.",
    "what_it_is_for": "Street-running passenger rail vehicles.",
    "affordances": [
      "explain kinds of tram",
      "support using tram networks",
      "describe technology and history",
      "relate to transport planning"
    ],
    "distinguishing_features": [
      "Street running",
      "Electric traction",
      "Passenger service",
      "Articulated forms"
    ],
    "appearance": "A long rail vehicle on street tracks, often with a pantograph.",
    "visual_identification": [
      "Runs on street rails",
      "Electric, often overhead wires",
      "A bus has no rails; a metro runs on segregated track"
    ],
    "physical_properties": [
      {
        "quantity": "Overall vehicle length",
        "unit": "m",
        "typical_range": "",
        "note": "Measure between the outermost ends of the vehicle and specify whether couplers are included."
      },
      {
        "quantity": "Vehicle mass",
        "unit": "kg",
        "typical_range": "",
        "note": "Obtain mass from weighing or vehicle specifications and distinguish empty condition from passenger loading."
      },
      {
        "quantity": "Track gauge compatibility",
        "unit": "mm",
        "typical_range": "",
        "note": "Record the specified distance between the inner rail faces for the track on which the vehicle is designed to run."
      },
      {
        "quantity": "Boarding floor height",
        "unit": "mm",
        "typical_range": "",
        "note": "Measure the entrance floor height above the top of the rail under a stated loading condition."
      }
    ],
    "families_and_kinds": [
      "historic and heritage trams",
      "modern low-floor trams",
      "articulated and multi-section trams",
      "tram-trains and light rail vehicles",
      "special trams such as restaurant and cable trams"
    ],
    "related_models": [
      {
        "relation": "is a kind of",
        "target": "rolling stock",
        "why": "category"
      },
      {
        "relation": "is a kind of",
        "target": "light rail vehicle",
        "why": "category"
      },
      {
        "relation": "is related to",
        "target": "bus",
        "why": "other urban transit"
      },
      {
        "relation": "is related to",
        "target": "railway",
        "why": "rail transport"
      }
    ],
    "identifiers": [],
    "standards_and_regulation": [
      "Tramway safety regulations",
      "Vehicle accessibility standards",
      "Road traffic rules for trams"
    ],
    "failure_modes_and_hazards": [
      "Collisions with road users",
      "Derailments",
      "Overhead line hazards"
    ],
    "in_scope": [],
    "out_of_scope": [],
    "characteristics": [],
    "agent_conduct": {
      "may": [
        "Report tram routes, times and service changes from the operator.",
        "Drive or dispatch a tram only where it is authorized by the operator and safety system."
      ],
      "must_not": [
        "Operate a tram without authorization or with failed brakes or doors.",
        "Encourage people to walk, cycle or park on tram tracks or near overhead wires.",
        "Interfere with tram signals, points or power supply.",
        "Hide a collision or near miss from the operator."
      ],
      "requires_human": [
        "Restarting service after a collision or derailment.",
        "Diverting or suspending a tram line."
      ]
    },
    "ethics": {
      "considerations": [
        "Trams share streets with pedestrians and cyclists, so collisions can be deadly.",
        "Trams give access to cities for people who cannot drive."
      ],
      "affected_parties": [
        "Passengers",
        "Pedestrians and cyclists",
        "Tram drivers"
      ]
    },
    "owners": {
      "steward": "The tram operator; the transport authority owns the network in many cities.",
      "master_systems": [
        "Railway and tramway vehicle registers"
      ]
    }
  },
  "sources": [
    {
      "id": "wikidata",
      "title": "Wikidata item Q3407658: tram",
      "url": "https://www.wikidata.org/wiki/Q3407658",
      "url_status": "live",
      "what_it_supports": "identity and sense of the item",
      "checked_by": "wikidata-api"
    },
    {
      "id": "wikipedia-en",
      "title": "Wikipedia: Tram",
      "url": "https://en.wikipedia.org/wiki/Tram",
      "url_status": "live",
      "what_it_supports": "general description of the item",
      "checked_by": "wikidata-api sitelink"
    }
  ],
  "structure": {
    "bundles": [
      {
        "id": "understand",
        "name": "Understand",
        "description": "What trams are.",
        "rationale": "Definitions.",
        "layers": [
          {
            "id": "kinds",
            "name": "Kinds",
            "description": "Kinds of tram.",
            "findings": [
              {
                "id": "kinds-finding",
                "name": "Kinds",
                "description": "Kinds.",
                "questions": [
                  {
                    "text": "How do historic, modern low-floor, articulated and tram-train vehicles differ, and how does a tram differ from light rail and metro?",
                    "kind": "definition"
                  },
                  {
                    "text": "Which entry fits a specific tram model?",
                    "kind": "action"
                  }
                ]
              }
            ]
          },
          {
            "id": "technology",
            "name": "Technology",
            "description": "Technology.",
            "findings": [
              {
                "id": "technology-finding",
                "name": "Technology",
                "description": "Technology.",
                "questions": [
                  {
                    "text": "How are trams powered, braked and controlled, and what are catenary-free options?",
                    "kind": "definition"
                  },
                  {
                    "text": "How are trams built for accessibility?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "use",
        "name": "Use",
        "description": "Riding trams.",
        "rationale": "Practice.",
        "layers": [
          {
            "id": "ride",
            "name": "Ride",
            "description": "Using a tram network.",
            "findings": [
              {
                "id": "ride-finding",
                "name": "Ride",
                "description": "Riding.",
                "questions": [
                  {
                    "text": "How can a tram network be used, with tickets, routes and accessibility?",
                    "kind": "action"
                  },
                  {
                    "text": "Which safety rules apply to passengers and road users around trams?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          },
          {
            "id": "specials",
            "name": "Specials",
            "description": "Special trams.",
            "findings": [
              {
                "id": "specials-finding",
                "name": "Specials",
                "description": "Special trams.",
                "questions": [
                  {
                    "text": "What are restaurant trams, heritage trams and cable-hauled cars, and where do they run?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which entry fits a specific heritage line?",
                    "kind": "action"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "plan",
        "name": "Plan",
        "description": "Trams in cities.",
        "rationale": "Planning.",
        "layers": [
          {
            "id": "planning",
            "name": "Planning",
            "description": "Tram planning.",
            "findings": [
              {
                "id": "planning-finding",
                "name": "Planning",
                "description": "Planning.",
                "questions": [
                  {
                    "text": "How are tram lines planned and evaluated against buses and metro, according to transport planners?",
                    "kind": "provenance"
                  },
                  {
                    "text": "What are typical costs and capacities?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          },
          {
            "id": "safety",
            "name": "Safety",
            "description": "Tram safety.",
            "findings": [
              {
                "id": "safety-finding",
                "name": "Safety",
                "description": "Safety.",
                "questions": [
                  {
                    "text": "How are tram collisions and derailments prevented, and which regulations apply?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which entry fits road safety?",
                    "kind": "action"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "learn",
        "name": "Learn",
        "description": "History and teaching.",
        "rationale": "Context.",
        "layers": [
          {
            "id": "history",
            "name": "History",
            "description": "History of trams.",
            "findings": [
              {
                "id": "history-finding",
                "name": "History",
                "description": "History.",
                "questions": [
                  {
                    "text": "How did trams develop from horse trams to electric and modern systems, and why did many cities remove and later restore them?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which references are standard?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          },
          {
            "id": "teach",
            "name": "Teach",
            "description": "Teaching.",
            "findings": [
              {
                "id": "teach-finding",
                "name": "Teach",
                "description": "Teaching.",
                "questions": [
                  {
                    "text": "How can tram technology and urban transport history be taught?",
                    "kind": "action"
                  },
                  {
                    "text": "Which misconceptions arise?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          }
        ]
      }
    ]
  },
  "openQuestions": [
    "Should each tram model be a separate entry?",
    "How should network data be linked?",
    "How should safety statistics be linked?"
  ],
  "statistics": {
    "bundles": 4,
    "layers": 8,
    "findings": 8,
    "questions": 16
  }
}