{
  "vercy": "1.0-draft",
  "publication": {
    "status": "research-draft",
    "adjudicationStatus": "unreviewed",
    "publishableCanonical": false,
    "generatedAt": "2026-10-21T21:31:16Z",
    "providers": [
      "Claude"
    ],
    "breadth": "researched by Claude against the sources listed below",
    "pass": 2,
    "wave": 5,
    "engine": "claude",
    "gate": {
      "passed": true,
      "version": "1.0",
      "at": "2026-10-22T10:59:06+00:00",
      "evidence": [
        "completeness 1.00",
        "sense: Wikidata description",
        "3 live sources",
        "review by codex: pass"
      ]
    }
  },
  "metaModel": {
    "id": "THING-Q2451773",
    "registryId": "vr.tr.stair-towers",
    "name": "stair towers",
    "version": "0.2.0-wave.5",
    "entryKind": "thing",
    "family": "Thing Registry",
    "domain": [
      "PHY.BLT"
    ],
    "status": "research-draft"
  },
  "canonicalUrl": "https://ver.cy/models/thing/q2451773/",
  "model": {
    "registry_id": "vr.tr.stair-towers",
    "name": "stair towers",
    "purpose": "Let an agent describe stair towers by period, form and function, and point to heritage and fire safety sources.",
    "definition": "A tower-like wing or projection of a building that contains a staircase, often as a distinct architectural element on the facade, as in Renaissance castles and town houses; also a modern fire-escape stair core.",
    "what_it_is_for": "Providing vertical circulation, often with architectural prominence.",
    "affordances": [
      "describe form and period",
      "describe notable examples",
      "explain fire safety roles of modern stair towers",
      "describe heritage status"
    ],
    "distinguishing_features": [
      "Projects from the main building as its own volume.",
      "Spiral staircases are typical in historic examples.",
      "Modern stair towers may be enclosed protected escape routes."
    ],
    "appearance": "A projecting tower, often polygonal or round, containing a spiral or straight staircase.",
    "visual_identification": [
      "Tower projecting from a facade with staircase windows following the stair"
    ],
    "physical_properties": [],
    "families_and_kinds": [
      "Renaissance stair tower (Treppenturm)",
      "spiral stair turret",
      "modern escape stair tower"
    ],
    "related_models": [
      {
        "relation": "is part of",
        "target": "building",
        "why": "architecture"
      },
      {
        "relation": "contains",
        "target": "staircase",
        "why": "element"
      },
      {
        "relation": "is related to",
        "target": "turret",
        "why": "smaller tower"
      },
      {
        "relation": "may be",
        "target": "listed building",
        "why": "heritage"
      }
    ],
    "identifiers": [
      {
        "scheme": "heritage list entry",
        "value_or_pattern": "register-specific",
        "note": ""
      }
    ],
    "standards_and_regulation": [
      "Building and fire safety codes for escape stairs",
      "Heritage protection law"
    ],
    "failure_modes_and_hazards": [
      "Falls on steep spiral stairs",
      "Smoke spread without protection"
    ],
    "agent_conduct": {
      "may": [
        "describe architecture and examples"
      ],
      "must_not": [
        "assess fire safety compliance"
      ],
      "requires_human": [
        "fire safety assessments by qualified professionals"
      ]
    },
    "ethics": {
      "considerations": [
        "heritage",
        "safety"
      ],
      "affected_parties": [
        "occupants",
        "visitors"
      ]
    },
    "owners": {
      "steward": "the owner of each building",
      "master_systems": [
        "heritage registers"
      ]
    },
    "facets_not_applicable": {
      "properties": "Stair towers vary; dimensions belong to each building."
    },
    "in_scope": [],
    "out_of_scope": [],
    "characteristics": []
  },
  "sources": [
    {
      "id": "SRC-001",
      "title": "Q2451773",
      "publisher": "Wikidata",
      "url": "https://www.wikidata.org/wiki/Q2451773",
      "what_it_supports": "identity of the registry item, labels and sitelinks",
      "url_status": "live"
    },
    {
      "id": "SRC-002",
      "title": "Listed Building: Lendal Tower",
      "publisher": "City of York Council",
      "url": "https://her.york.gov.uk/Designation/DYO641",
      "what_it_supports": "Projecting circular stair tower, spiral staircase, windows and heritage designation.",
      "url_status": "unverified"
    },
    {
      "id": "SRC-003",
      "title": "Scotstarvit Tower: History and stories",
      "publisher": "Historic Environment Scotland",
      "url": "https://www.historicenvironment.scot/visit/all/scotstarvit-tower/history-and-stories/",
      "what_it_supports": "Historic tower architecture with a spiral staircase occupying a smaller building wing.",
      "url_status": "live"
    },
    {
      "id": "SRC-004",
      "title": "Fire safety: Approved Document B",
      "publisher": "UK Government",
      "url": "https://www.gov.uk/government/publications/fire-safety-approved-document-b?trk=public_post_comment-text",
      "what_it_supports": "Protected escape stairs, enclosure and fire safety requirements in England.",
      "url_status": "live"
    }
  ],
  "structure": {
    "bundles": [
      {
        "id": "tower",
        "name": "Tower",
        "description": "Which stair tower.",
        "rationale": "Identity first.",
        "layers": [
          {
            "id": "building",
            "name": "Building",
            "description": "Location.",
            "findings": [
              {
                "id": "building",
                "name": "Building",
                "description": "Name and place.",
                "questions": [
                  {
                    "text": "Which building is it part of?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Where?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          },
          {
            "id": "period",
            "name": "Period",
            "description": "Date and style.",
            "findings": [
              {
                "id": "period",
                "name": "Period",
                "description": "Date and style.",
                "questions": [
                  {
                    "text": "When was it built?",
                    "kind": "provenance"
                  },
                  {
                    "text": "In which style?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "form",
        "name": "Form",
        "description": "Architecture.",
        "rationale": "Form defines the type.",
        "layers": [
          {
            "id": "shape",
            "name": "Shape",
            "description": "Plan and height.",
            "findings": [
              {
                "id": "shape",
                "name": "Shape",
                "description": "Plan and storeys.",
                "questions": [
                  {
                    "text": "What plan shape?",
                    "kind": "provenance"
                  },
                  {
                    "text": "How many storeys?",
                    "kind": "measurement"
                  }
                ]
              }
            ]
          },
          {
            "id": "stair",
            "name": "Stair",
            "description": "Stair type.",
            "findings": [
              {
                "id": "stair",
                "name": "Stair",
                "description": "Type.",
                "questions": [
                  {
                    "text": "What kind of staircase?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which direction does it turn?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "function",
        "name": "Function",
        "description": "Use.",
        "rationale": "Function varies.",
        "layers": [
          {
            "id": "circulation",
            "name": "Circulation",
            "description": "Access.",
            "findings": [
              {
                "id": "circulation",
                "name": "Circulation",
                "description": "Floors served.",
                "questions": [
                  {
                    "text": "Which floors does it serve?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Is it the main stair?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          },
          {
            "id": "escape",
            "name": "Escape",
            "description": "Fire role.",
            "findings": [
              {
                "id": "escape-role",
                "name": "Escape role",
                "description": "Rule.",
                "questions": [
                  {
                    "text": "Is it a protected escape route?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Under which code?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "heritage",
        "name": "Heritage",
        "description": "Protection.",
        "rationale": "Many are historic.",
        "layers": [
          {
            "id": "listing",
            "name": "Listing",
            "description": "Status.",
            "findings": [
              {
                "id": "listing",
                "name": "Listing",
                "description": "Status.",
                "questions": [
                  {
                    "text": "Is it protected?",
                    "kind": "provenance"
                  },
                  {
                    "text": "By whom?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          },
          {
            "id": "conservation",
            "name": "Conservation",
            "description": "Works.",
            "findings": [
              {
                "id": "conservation",
                "name": "Conservation",
                "description": "Works.",
                "questions": [
                  {
                    "text": "Which works were done?",
                    "kind": "provenance"
                  },
                  {
                    "text": "When?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          }
        ]
      }
    ]
  },
  "openQuestions": [],
  "statistics": {
    "bundles": 4,
    "layers": 8,
    "findings": 8,
    "questions": 16
  }
}