{
  "vercy": "1.0-draft",
  "publication": {
    "status": "research-draft",
    "adjudicationStatus": "unreviewed",
    "publishableCanonical": false,
    "generatedAt": "2026-09-13T13:48:29Z",
    "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": 4,
    "engine": "claude",
    "enrichment": {
      "pass": 3,
      "engine": "claude",
      "producedAt": "2026-10-06T10:00:00Z",
      "ingestedAt": "2026-10-06T07:35:32+00:00",
      "fields": [
        "agent_conduct",
        "ethics",
        "owners"
      ]
    },
    "gate": {
      "passed": true,
      "version": "1.0",
      "at": "2026-10-06T19:51:57+00:00",
      "evidence": [
        "completeness 1.00",
        "sense: Wikidata description",
        "2 live sources",
        "review by codex: pass"
      ]
    }
  },
  "metaModel": {
    "id": "THING-Q24045957",
    "registryId": "vr.tr.railway-node",
    "name": "railway node",
    "version": "0.2.0-wave.4",
    "entryKind": "thing",
    "family": "Thing Registry",
    "domain": [
      "PHY.BLT"
    ],
    "status": "research-draft"
  },
  "canonicalUrl": "https://ver.cy/models/thing/q24045957/",
  "model": {
    "registry_id": "vr.tr.railway-node",
    "name": "railway node",
    "purpose": "Let an agent explain railway nodes as network elements, relay their kinds and roles from railway engineering and network analysis sources, describe major hubs, and distinguish nodes from stations in general, from junctions as track layouts and from network links.",
    "definition": "A point in a railway network where lines meet, diverge or cross, including junctions, stations with multiple routes, marshalling yards and interchange points, forming the nodes of the network graph used in planning, timetabling and analysis; railway nodes range from simple junctions to major hubs handling many lines and services.",
    "what_it_is_for": "Connecting lines in a railway network.",
    "affordances": [
      "explain the concept",
      "relay kinds and roles",
      "describe hubs",
      "distinguish related concepts"
    ],
    "distinguishing_features": [
      "Network element",
      "Convergence of lines",
      "Hub function",
      "Planning unit"
    ],
    "appearance": "A junction, hub station or yard where lines converge.",
    "visual_identification": [
      "Meeting point of railway lines",
      "Junctions, hub stations, marshalling yards, interchanges",
      "A station may be on one line; a junction is the track layout; links are the lines between nodes"
    ],
    "physical_properties": [
      {
        "quantity": "largest hubs",
        "typical_range": "dozens of platforms",
        "unit": "note",
        "note": "e.g. Grand Central"
      },
      {
        "quantity": "network analysis",
        "typical_range": "nodes and edges",
        "unit": "note",
        "note": "graph theory"
      }
    ],
    "families_and_kinds": [
      "simple junctions",
      "hub and interchange stations",
      "marshalling and freight yards",
      "border and gauge-change nodes",
      "nodes in network models"
    ],
    "related_models": [
      {
        "relation": "is a kind of",
        "target": "rail infrastructure",
        "why": "in registry terms"
      },
      {
        "relation": "is a kind of",
        "target": "junction",
        "why": "in registry terms"
      },
      {
        "relation": "is analysed in",
        "target": "network theory",
        "why": "as a node"
      },
      {
        "relation": "is contrasted with",
        "target": "railway line",
        "why": "the link between nodes"
      }
    ],
    "identifiers": [],
    "standards_and_regulation": [
      "Railway infrastructure and signalling standards",
      "EU TEN-T network designations of nodes"
    ],
    "failure_modes_and_hazards": [
      "Congestion and delays at hubs",
      "Confusing nodes with stations or junction layouts",
      "Inconsistent definitions across data sources"
    ],
    "in_scope": [],
    "out_of_scope": [],
    "characteristics": [],
    "agent_conduct": {
      "may": [
        "Model railway nodes in network graphs for planning and timetabling analysis.",
        "Report congestion and delays at nodes from operator data."
      ],
      "must_not": [
        "Change signalling, routing or points at a real node without authority from the infrastructure manager.",
        "Confuse a node in a network model with a station or a physical junction layout.",
        "Publish security-sensitive details of critical rail infrastructure beyond what operators make public.",
        "Merge node data from sources with different definitions without noting it."
      ],
      "requires_human": [
        "Any operational change to train movements at a node."
      ]
    },
    "ethics": {
      "considerations": [
        "Bottlenecks at hubs spread delays across whole networks and affect many passengers.",
        "Railway infrastructure is critical and must be protected from interference."
      ],
      "affected_parties": [
        "Passengers",
        "Rail staff",
        "Freight customers"
      ]
    },
    "owners": {
      "steward": "The infrastructure manager of the railway network the node belongs to.",
      "master_systems": [
        "Railway infrastructure registers"
      ]
    }
  },
  "sources": [
    {
      "id": "wikidata",
      "title": "Wikidata item Q24045957: railway node",
      "url": "https://www.wikidata.org/wiki/Q24045957",
      "url_status": "live",
      "what_it_supports": "identity and sense of the item",
      "checked_by": "wikidata-api"
    },
    {
      "id": "wikipedia-en",
      "title": "Wikipedia: Railway node",
      "url": "https://en.wikipedia.org/wiki/Railway_node",
      "url_status": "live",
      "what_it_supports": "general description of the item",
      "checked_by": "wikidata-api sitelink"
    }
  ],
  "structure": {
    "bundles": [
      {
        "id": "understand",
        "name": "Understand",
        "description": "What a railway node is.",
        "rationale": "Definition.",
        "layers": [
          {
            "id": "definition",
            "name": "Definition",
            "description": "Definition.",
            "findings": [
              {
                "id": "definition-finding",
                "name": "Definition",
                "description": "Definition.",
                "questions": [
                  {
                    "text": "What is a railway node, and how does it differ from a station, a junction layout and a line?",
                    "kind": "definition"
                  },
                  {
                    "text": "Is the question about the network concept, a kind or a specific hub?",
                    "kind": "boundary"
                  }
                ]
              }
            ]
          },
          {
            "id": "kinds",
            "name": "Kinds",
            "description": "Kinds.",
            "findings": [
              {
                "id": "kinds-finding",
                "name": "Kinds",
                "description": "Kinds.",
                "questions": [
                  {
                    "text": "What are junctions, hub stations, yards, border nodes and interchanges?",
                    "kind": "definition"
                  },
                  {
                    "text": "Which entry fits the specific kind?",
                    "kind": "action"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "engineering",
        "name": "Engineering",
        "description": "Engineering.",
        "rationale": "Practice.",
        "layers": [
          {
            "id": "layout",
            "name": "Layout",
            "description": "Track layout and signalling.",
            "findings": [
              {
                "id": "layout-finding",
                "name": "Layout",
                "description": "Layout.",
                "questions": [
                  {
                    "text": "How are nodes laid out and signalled to handle converging traffic?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which references are standard?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          },
          {
            "id": "capacity",
            "name": "Capacity",
            "description": "Capacity.",
            "findings": [
              {
                "id": "capacity-finding",
                "name": "Capacity",
                "description": "Capacity.",
                "questions": [
                  {
                    "text": "How is node capacity analysed and improved?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which sources are cited?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "planning",
        "name": "Planning",
        "description": "Planning and analysis.",
        "rationale": "Science.",
        "layers": [
          {
            "id": "network",
            "name": "Network",
            "description": "Network analysis.",
            "findings": [
              {
                "id": "network-finding",
                "name": "Network",
                "description": "Network.",
                "questions": [
                  {
                    "text": "How are railway networks modelled as graphs, and what do node measures reveal?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which entry fits network theory?",
                    "kind": "action"
                  }
                ]
              }
            ]
          },
          {
            "id": "timetabling",
            "name": "Timetabling",
            "description": "Timetabling.",
            "findings": [
              {
                "id": "timetabling-finding",
                "name": "Timetabling",
                "description": "Timetabling.",
                "questions": [
                  {
                    "text": "How do nodes shape timetables and connections?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which entry fits railway timetable?",
                    "kind": "action"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "context",
        "name": "Context",
        "description": "Hubs and history.",
        "rationale": "Context.",
        "layers": [
          {
            "id": "hubs",
            "name": "Hubs",
            "description": "Major hubs.",
            "findings": [
              {
                "id": "hubs-finding",
                "name": "Hubs",
                "description": "Hubs.",
                "questions": [
                  {
                    "text": "What are the world s major railway hubs?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which entry fits the specific hub?",
                    "kind": "action"
                  }
                ]
              }
            ]
          },
          {
            "id": "history",
            "name": "History",
            "description": "History.",
            "findings": [
              {
                "id": "history-finding",
                "name": "History",
                "description": "History.",
                "questions": [
                  {
                    "text": "How did junctions and hubs develop with railway networks?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which entry fits the history of rail transport?",
                    "kind": "action"
                  }
                ]
              }
            ]
          }
        ]
      }
    ]
  },
  "openQuestions": [
    "Should junction and hub station be the primary linked entries?",
    "How should railway engineering sources be linked?",
    "How should network data models define nodes?"
  ],
  "statistics": {
    "bundles": 4,
    "layers": 8,
    "findings": 8,
    "questions": 16
  }
}