{
  "vercy": "1.0-draft",
  "publication": {
    "status": "research-draft",
    "adjudicationStatus": "unreviewed",
    "publishableCanonical": false,
    "generatedAt": "2026-10-21T21:05:06Z",
    "providers": [
      "Claude"
    ],
    "breadth": "researched by Claude against the sources listed below",
    "pass": 2,
    "wave": 5,
    "engine": "claude",
    "gate": {
      "passed": true,
      "version": "1.0",
      "at": "2026-10-22T10:17:00+00:00",
      "evidence": [
        "completeness 1.00",
        "sense: Wikidata description",
        "6 live sources",
        "review by codex: pass"
      ]
    }
  },
  "metaModel": {
    "id": "THING-Q5017834",
    "registryId": "vr.tr.caisson-q5017834",
    "name": "caisson",
    "version": "0.2.0-wave.5",
    "entryKind": "thing",
    "family": "Thing Registry",
    "domain": [
      "PHY.BLT"
    ],
    "status": "research-draft"
  },
  "canonicalUrl": "https://ver.cy/models/thing/q5017834/",
  "model": {
    "registry_id": "vr.tr.caisson-q5017834",
    "name": "caisson",
    "purpose": "Let an agent describe caisson ceilings, their construction, symbolism and notable examples, and tell them from Western coffered ceilings.",
    "definition": "A caisson ceiling (zaojing), also called a spider web ceiling, in traditional East Asian, especially Chinese, architecture: an elaborate recessed, often domed ceiling feature, usually above an important seat or image, built of nested square, octagonal or circular tiers; timber examples use bracket construction, and Buddhist caves reproduce the form in paint or modelling.",
    "what_it_is_for": "Decorating and marking the most important space of a hall, such as above a throne or altar.",
    "affordances": [
      "describe construction and forms",
      "describe symbolism and placement",
      "give notable examples",
      "tell from coffered ceilings"
    ],
    "distinguishing_features": [
      "An elaborate recessed feature; a hall may have several, unlike Western coffered ceilings with repeated uniform panels.",
      "Timber examples commonly use dougong bracket sets; cave examples are painted or modelled.",
      "Some forms are read as round heaven over square earth, according to specific sources."
    ],
    "appearance": "A sunken, layered ceiling with brackets, carving and painting, often with a dragon or lotus at the centre.",
    "visual_identification": [
      "Concentric tiers of brackets forming a recessed dome",
      "Radiating, web-like patterns in some examples"
    ],
    "physical_properties": [],
    "families_and_kinds": [
      "square and octagonal tiered caissons",
      "circular caissons",
      "spider-web (radiating) caissons"
    ],
    "related_models": [
      {
        "relation": "is part of",
        "target": "ceiling",
        "why": "architectural element"
      },
      {
        "relation": "is confused with",
        "target": "coffered ceiling",
        "why": "Western form"
      },
      {
        "relation": "uses",
        "target": "dougong",
        "why": "bracket system"
      },
      {
        "relation": "is found in",
        "target": "Chinese palace and temple architecture",
        "why": "context"
      }
    ],
    "identifiers": [],
    "standards_and_regulation": [
      "Heritage protection of historic buildings, such as China's Cultural Relics Protection Law"
    ],
    "failure_modes_and_hazards": [
      "Decay and fire in timber buildings"
    ],
    "agent_conduct": {
      "may": [
        "describe forms, symbolism and examples"
      ],
      "must_not": [
        "present uncertain attributions as fact"
      ],
      "requires_human": []
    },
    "ethics": {
      "considerations": [
        "heritage conservation"
      ],
      "affected_parties": [
        "communities",
        "visitors"
      ]
    },
    "owners": {
      "steward": "the owner of each building, with heritage authorities for protected ones",
      "master_systems": [
        "heritage registers"
      ]
    },
    "facets_not_applicable": {
      "properties": "Caissons vary; dimensions belong to each ceiling."
    },
    "in_scope": [],
    "out_of_scope": [],
    "characteristics": []
  },
  "sources": [
    {
      "id": "SRC-001",
      "title": "Q5017834",
      "publisher": "Wikidata",
      "url": "https://www.wikidata.org/wiki/Q5017834",
      "what_it_supports": "identity of the registry item, labels and sitelinks",
      "url_status": "live"
    },
    {
      "id": "SRC-002",
      "title": "Zaojing",
      "publisher": "The Palace Museum",
      "url": "https://www.dpm.org.cn/lemmas/241427.html",
      "what_it_supports": "Domed decoration, nested square, octagonal and circular forms, dragon motifs and important halls.",
      "url_status": "live"
    },
    {
      "id": "SRC-003",
      "title": "Ceiling Decorations",
      "publisher": "Hong Kong Palace Museum",
      "url": "https://www.hkpm.org.hk/en/the-ways-in-patterns-4",
      "what_it_supports": "Palace examples, placement and round-heaven and square-earth symbolism.",
      "url_status": "live"
    },
    {
      "id": "SRC-004",
      "title": "Mogao Cave 79",
      "publisher": "Dunhuang Academy",
      "url": "https://www.dha.ac.cn/info/1425/3618.htm",
      "what_it_supports": "Painted cave caissons and lotus decoration.",
      "url_status": "live"
    },
    {
      "id": "SRC-005",
      "title": "The Tianhua and Zaojing Ceilings of the Yongle Taoist Temple in Ruicheng, Shanxi Province",
      "publisher": "Journal of Built Heritage",
      "url": "https://www.jgcm.ac.cn/article/doi/10.12329/20969368.2021.03006",
      "what_it_supports": "Survey-based documentation of caisson forms and construction at Yongle Temple.",
      "url_status": "live"
    },
    {
      "id": "SRC-006",
      "title": "Caisson (Asian architecture)",
      "publisher": "Wikipedia",
      "url": "https://en.wikipedia.org/wiki/Caisson_(Asian_architecture)",
      "what_it_supports": "'Spider web ceiling' synonym, multiple caissons in a hall and distinction from ordinary coffering.",
      "url_status": "live"
    },
    {
      "id": "SRC-007",
      "title": "Law of the People's Republic of China on Cultural Relics Protection",
      "publisher": "National People's Congress of China",
      "url": "https://en.npc.gov.cn.cdurl.cn/2024-11/08/c_1115996.htm",
      "what_it_supports": "Heritage protection framework for qualifying historic buildings.",
      "url_status": "unverified"
    }
  ],
  "structure": {
    "bundles": [
      {
        "id": "form",
        "name": "Form",
        "description": "What it looks like.",
        "rationale": "Forms vary.",
        "layers": [
          {
            "id": "geometry",
            "name": "Geometry",
            "description": "Tiers and shapes.",
            "findings": [
              {
                "id": "geometry",
                "name": "Geometry",
                "description": "Shape and tiers.",
                "questions": [
                  {
                    "text": "What shape and how many tiers?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Is it radiating like a web?",
                    "kind": "boundary"
                  }
                ]
              }
            ]
          },
          {
            "id": "decoration",
            "name": "Decoration",
            "description": "Carving and painting.",
            "findings": [
              {
                "id": "decoration",
                "name": "Decoration",
                "description": "Motifs.",
                "questions": [
                  {
                    "text": "Which motifs decorate it?",
                    "kind": "provenance"
                  },
                  {
                    "text": "What is at the centre?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "construction",
        "name": "Construction",
        "description": "How it is built.",
        "rationale": "Timber framing defines it.",
        "layers": [
          {
            "id": "structure",
            "name": "Structure",
            "description": "Brackets and beams.",
            "findings": [
              {
                "id": "structure",
                "name": "Structure",
                "description": "Elements.",
                "questions": [
                  {
                    "text": "Which structural elements form it?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Is it load-bearing or decorative?",
                    "kind": "boundary"
                  }
                ]
              }
            ]
          },
          {
            "id": "materials",
            "name": "Materials",
            "description": "Timber and paint.",
            "findings": [
              {
                "id": "materials",
                "name": "Materials",
                "description": "Materials.",
                "questions": [
                  {
                    "text": "Which materials are used?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Have they been restored?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "meaning",
        "name": "Meaning",
        "description": "Symbolism and placement.",
        "rationale": "Placement signals status.",
        "layers": [
          {
            "id": "placement",
            "name": "Placement",
            "description": "Above throne or altar.",
            "findings": [
              {
                "id": "placement",
                "name": "Placement",
                "description": "Location in the building.",
                "questions": [
                  {
                    "text": "Where in the building is it?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Why there?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          },
          {
            "id": "symbolism",
            "name": "Symbolism",
            "description": "Meanings.",
            "findings": [
              {
                "id": "symbolism",
                "name": "Symbolism",
                "description": "Meaning and source.",
                "questions": [
                  {
                    "text": "What does it symbolise?",
                    "kind": "provenance"
                  },
                  {
                    "text": "According to which source?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "examples",
        "name": "Examples",
        "description": "Notable caissons.",
        "rationale": "Examples need records.",
        "layers": [
          {
            "id": "buildings",
            "name": "Buildings",
            "description": "Locations.",
            "findings": [
              {
                "id": "example",
                "name": "Example",
                "description": "Building and date.",
                "questions": [
                  {
                    "text": "Which buildings have notable caissons?",
                    "kind": "provenance"
                  },
                  {
                    "text": "From when?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          },
          {
            "id": "protection",
            "name": "Protection",
            "description": "Heritage status.",
            "findings": [
              {
                "id": "heritage-status",
                "name": "Heritage status",
                "description": "Listing.",
                "questions": [
                  {
                    "text": "Is the building protected?",
                    "kind": "provenance"
                  },
                  {
                    "text": "At what level?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          }
        ]
      }
    ]
  },
  "openQuestions": [
    "Should the entry be named zaojing or caisson ceiling?"
  ],
  "statistics": {
    "bundles": 4,
    "layers": 8,
    "findings": 8,
    "questions": 16
  }
}