{
  "vercy": "1.0-draft",
  "publication": {
    "status": "research-draft",
    "adjudicationStatus": "unreviewed",
    "publishableCanonical": false,
    "generatedAt": "2026-09-13T00:32:31Z",
    "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": 3,
    "engine": "claude",
    "enrichment": {
      "pass": 3,
      "engine": "claude",
      "producedAt": "2026-10-06T10:00:00Z",
      "ingestedAt": "2026-10-06T07:04:54+00:00",
      "fields": [
        "agent_conduct",
        "ethics",
        "owners"
      ]
    },
    "gate": {
      "passed": true,
      "version": "1.0",
      "at": "2026-10-07T10:10:28+00:00",
      "evidence": [
        "completeness 1.00",
        "sense: Wikidata description",
        "2 live sources",
        "review by codex: pass"
      ]
    }
  },
  "metaModel": {
    "id": "THING-Q23419",
    "registryId": "vr.tr.merlon",
    "name": "merlon",
    "version": "0.2.0-wave.3",
    "entryKind": "thing",
    "family": "Thing Registry",
    "domain": [
      "PHY.BLT"
    ],
    "status": "research-draft"
  },
  "canonicalUrl": "https://ver.cy/models/thing/q23419/",
  "model": {
    "registry_id": "vr.tr.merlon",
    "name": "merlon",
    "purpose": "Let an agent explain merlons and crenellation, describe forms and regional styles, relay their defensive function and later decorative use, and distinguish merlons from crenels, trumeaux and other wall elements.",
    "definition": "The solid upright section of a battlemented parapet on a castle, fortification or city wall, standing between the open gaps called crenels or embrasures, together forming the crenellation that sheltered defenders while they observed and fought through the gaps; merlons vary in shape from plain rectangles to the swallowtail Ghibelline form of Italian fortifications and often carried arrow slits, and the registry parent trumeau is a misclassification.",
    "what_it_is_for": "Not applicable; a defensive architectural element.",
    "affordances": [
      "explain the element and crenellation",
      "describe forms and styles",
      "relay function and history",
      "distinguish from related elements"
    ],
    "distinguishing_features": [
      "Part of crenellation",
      "Shelter for defenders",
      "Regional forms",
      "Later decorative use"
    ],
    "appearance": "A raised block of masonry along the top of a wall, alternating with gaps.",
    "visual_identification": [
      "Solid part of a battlement between gaps",
      "Rectangular, swallowtail and pointed forms",
      "The crenel is the gap; a trumeau is a central pier of a doorway, and the registry parent is wrong"
    ],
    "physical_properties": [
      {
        "quantity": "Merlon height",
        "unit": "m",
        "typical_range": "",
        "note": "Measure vertically from the adjacent crenel sill level to the highest surviving point."
      },
      {
        "quantity": "Merlon width",
        "unit": "m",
        "typical_range": "",
        "note": "Measure horizontally between the adjoining crenels and specify the measurement elevation for shaped examples."
      },
      {
        "quantity": "Merlon thickness",
        "unit": "m",
        "typical_range": "",
        "note": "Measure between the inner and outer faces perpendicular to the parapet alignment."
      }
    ],
    "families_and_kinds": [
      "plain rectangular merlons",
      "Guelph square and Ghibelline swallowtail merlons",
      "merlons with arrow slits",
      "stepped and pointed merlons in Islamic and other traditions",
      "decorative merlons on Gothic Revival buildings"
    ],
    "related_models": [
      {
        "relation": "is a kind of",
        "target": "trumeau",
        "why": "in registry terms, a misclassification"
      },
      {
        "relation": "is part of",
        "target": "battlement",
        "why": "with crenels"
      },
      {
        "relation": "is contrasted with",
        "target": "crenel",
        "why": "the gap"
      },
      {
        "relation": "is found on",
        "target": "castle",
        "why": "and city walls"
      }
    ],
    "identifiers": [],
    "standards_and_regulation": [
      "Heritage protection of fortifications",
      "Historical licences to crenellate in England"
    ],
    "failure_modes_and_hazards": [
      "Confusing merlon with crenel",
      "The registry parent trumeau is wrong",
      "Decorative crenellation mistaken for defensive"
    ],
    "in_scope": [],
    "out_of_scope": [],
    "characteristics": [],
    "agent_conduct": {
      "may": [
        "Document and measure merlons and the parapet they stand in for a heritage survey.",
        "Explain battlement terms and regional forms from architectural sources."
      ],
      "must_not": [
        "Climb on or lean against a merlon or parapet that has not been assessed as stable.",
        "Allow visitors near an open crenel without a safe barrier.",
        "Rebuild, point or cap historic masonry without heritage consent.",
        "Present a modern decorative battlement as medieval fabric."
      ],
      "requires_human": [
        "Any repair, consolidation or change to historic masonry.",
        "Opening a wall walk to visitors."
      ]
    },
    "ethics": {
      "considerations": [
        "Loose parapet stone falls on people below, and the openings are a fall hazard.",
        "Over-restoration erases the evidence that gives a fortification its history."
      ],
      "affected_parties": [
        "Visitors on the wall walk",
        "People below the wall",
        "Conservators"
      ]
    },
    "owners": {
      "steward": "The owner or heritage body that keeps the structure, under the monument authority.",
      "master_systems": [
        "National heritage and monument registers"
      ]
    }
  },
  "sources": [
    {
      "id": "wikidata",
      "title": "Wikidata item Q23419: merlon",
      "url": "https://www.wikidata.org/wiki/Q23419",
      "url_status": "live",
      "what_it_supports": "identity and sense of the item",
      "checked_by": "wikidata-api"
    },
    {
      "id": "wikipedia-en",
      "title": "Wikipedia: Merlon",
      "url": "https://en.wikipedia.org/wiki/Merlon",
      "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 merlon is.",
        "rationale": "Definition.",
        "layers": [
          {
            "id": "definition",
            "name": "Definition",
            "description": "Definition.",
            "findings": [
              {
                "id": "definition-finding",
                "name": "Definition",
                "description": "Definition.",
                "questions": [
                  {
                    "text": "What is a merlon, and how does it relate to crenels and crenellation?",
                    "kind": "definition"
                  },
                  {
                    "text": "Is the element a merlon, a crenel or another wall feature?",
                    "kind": "boundary"
                  }
                ]
              }
            ]
          },
          {
            "id": "forms",
            "name": "Forms",
            "description": "Forms.",
            "findings": [
              {
                "id": "forms-finding",
                "name": "Forms",
                "description": "Forms.",
                "questions": [
                  {
                    "text": "What forms do merlons take, including Guelph and Ghibelline shapes?",
                    "kind": "definition"
                  },
                  {
                    "text": "Which entry fits the specific fortification?",
                    "kind": "action"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "function",
        "name": "Function",
        "description": "Defensive function.",
        "rationale": "History.",
        "layers": [
          {
            "id": "defence",
            "name": "Defence",
            "description": "Defence.",
            "findings": [
              {
                "id": "defence-finding",
                "name": "Defence",
                "description": "Defence.",
                "questions": [
                  {
                    "text": "How did merlons shelter defenders, and how did arrow slits and hoardings extend them?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which entry fits medieval fortification?",
                    "kind": "action"
                  }
                ]
              }
            ]
          },
          {
            "id": "evolution",
            "name": "Evolution",
            "description": "Evolution.",
            "findings": [
              {
                "id": "evolution-finding",
                "name": "Evolution",
                "description": "Evolution.",
                "questions": [
                  {
                    "text": "How did crenellation develop and decline with changes in siege warfare, as historians describe?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which references are standard?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "style",
        "name": "Style",
        "description": "Regional and decorative.",
        "rationale": "Context.",
        "layers": [
          {
            "id": "regional",
            "name": "Regional",
            "description": "Regional styles.",
            "findings": [
              {
                "id": "regional-finding",
                "name": "Regional",
                "description": "Regional.",
                "questions": [
                  {
                    "text": "How do merlon forms differ across Europe, the Islamic world and Asia?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which sources are cited?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          },
          {
            "id": "decorative",
            "name": "Decorative",
            "description": "Decorative use.",
            "findings": [
              {
                "id": "decorative-finding",
                "name": "Decorative",
                "description": "Decorative.",
                "questions": [
                  {
                    "text": "How were merlons used decoratively in Gothic Revival and later architecture?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which entry fits Gothic Revival architecture?",
                    "kind": "action"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "context",
        "name": "Context",
        "description": "Law and conservation.",
        "rationale": "Context.",
        "layers": [
          {
            "id": "licence",
            "name": "Licence",
            "description": "Licence to crenellate.",
            "findings": [
              {
                "id": "licence-finding",
                "name": "Licence",
                "description": "Licence.",
                "questions": [
                  {
                    "text": "What was the medieval English licence to crenellate?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which entry fits licence to crenellate?",
                    "kind": "action"
                  }
                ]
              }
            ]
          },
          {
            "id": "conservation",
            "name": "Conservation",
            "description": "Conservation.",
            "findings": [
              {
                "id": "conservation-finding",
                "name": "Conservation",
                "description": "Conservation.",
                "questions": [
                  {
                    "text": "How are battlements conserved and restored?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which entry fits heritage conservation?",
                    "kind": "action"
                  }
                ]
              }
            ]
          }
        ]
      }
    ]
  },
  "openQuestions": [
    "Should the registry parent be corrected to battlement?",
    "How should architectural references be linked?",
    "How should regional forms be recorded?"
  ],
  "statistics": {
    "bundles": 4,
    "layers": 8,
    "findings": 8,
    "questions": 16
  }
}