{
  "vercy": "1.0-draft",
  "publication": {
    "status": "research-draft",
    "adjudicationStatus": "unreviewed",
    "publishableCanonical": false,
    "generatedAt": "2026-09-12T03:55:22Z",
    "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": "2026-10-06T00:30:00Z",
      "ingestedAt": "2026-10-05T20:56:35+00:00",
      "fields": [
        "agent_conduct",
        "ethics",
        "owners"
      ]
    },
    "revisions": [
      {
        "at": "2026-10-06T22:49:45+00:00",
        "engine": "codex",
        "fields": [
          "agent_conduct",
          "definition",
          "purpose",
          "visual_identification"
        ],
        "answering_review": "9b0978393378d224d6ea0fa4052af17f64f7c7b9e35f3225ac44db25186963d3"
      }
    ],
    "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-Q34132",
    "registryId": "vr.tr.cylinder",
    "name": "cylinder",
    "version": "0.2.0-wave.2",
    "entryKind": "thing",
    "family": "Thing Registry",
    "domain": [
      "XCT.QLT"
    ],
    "status": "research-draft"
  },
  "canonicalUrl": "https://ver.cy/models/thing/q34132/",
  "model": {
    "registry_id": "vr.tr.cylinder",
    "name": "cylinder",
    "purpose": "Let an agent explain the fixed-distance cylindrical surface, describe its geometric properties and bounded portions, and distinguish it from solid cylinders, broader geometric generalisations and mechanical uses of the name.",
    "definition": "A cylindrical surface consisting of all points in three-dimensional Euclidean space at a fixed positive distance from a given straight line called its axis; in this sense it is an unbounded right circular cylindrical surface, not a solid or the broader class of oblique and arbitrary-base cylinders.",
    "what_it_is_for": "Solid or surface of points at fixed distance from an axis.",
    "affordances": [
      "explain the geometric cylinder",
      "support calculations",
      "describe variants",
      "separate other senses"
    ],
    "distinguishing_features": [
      "Axis of symmetry",
      "Circular cross-section",
      "Simple formulas",
      "Many senses"
    ],
    "appearance": "A tube or can shape with circular ends.",
    "visual_identification": [
      "Every point on the surface is at the same fixed distance from its straight axis.",
      "Cross-sections perpendicular to the axis are circles.",
      "The surface extends indefinitely along its axis and has no end caps or filled interior.",
      "A cone tapers, a prism has polygonal bases, and an engine cylinder is a machine part."
    ],
    "physical_properties": [],
    "families_and_kinds": [
      "right circular cylinders",
      "oblique cylinders",
      "semicylinders and cylindrical segments",
      "open and closed cylindrical surfaces",
      "generalised cylinders over other curves"
    ],
    "related_models": [
      {
        "relation": "is a kind of",
        "target": "geometric primitive",
        "why": "category"
      },
      {
        "relation": "is a kind of",
        "target": "analytic manifold",
        "why": "category"
      },
      {
        "relation": "is related to",
        "target": "base",
        "why": "the bases of a cylinder"
      },
      {
        "relation": "is related to",
        "target": "plane",
        "why": "cross-sections of cylinders"
      }
    ],
    "identifiers": [],
    "standards_and_regulation": [
      "Mathematical conventions",
      "Engineering standards for cylindrical parts",
      "No regulation of the concept"
    ],
    "failure_modes_and_hazards": [
      "Confusing senses of cylinder",
      "Formula errors for oblique or open cylinders",
      "Confusing surface and solid"
    ],
    "in_scope": [],
    "out_of_scope": [],
    "characteristics": [],
    "agent_conduct": {
      "may": [
        "Explain the fixed-distance definition and the properties of the resulting cylindrical surface.",
        "Discuss the area of a bounded portion when its boundaries are specified.",
        "Distinguish this surface from solid cylinders and geometric generalisations."
      ],
      "must_not": [
        "Confuse the geometric cylindrical surface with engine or gas cylinders.",
        "Treat oblique or arbitrary-base cylinders as satisfying this fixed-distance definition in general.",
        "Assign a finite total surface area or enclosed capacity to the unbounded surface.",
        "Present computed capacities for tanks without stating assumptions."
      ],
      "requires_human": [
        "Using calculated capacities for pressure vessels or storage decisions requires human review."
      ]
    },
    "ethics": {
      "considerations": [
        "Calculation errors propagate into wrong capacities and costs.",
        "Clear teaching supports learners."
      ],
      "affected_parties": [
        "Students",
        "Engineers",
        "People relying on calculations"
      ]
    },
    "owners": {
      "steward": "Nobody: a mathematical concept held in common.",
      "master_systems": []
    }
  },
  "sources": [
    {
      "id": "wikidata",
      "title": "Wikidata item Q34132: cylinder",
      "url": "https://www.wikidata.org/wiki/Q34132",
      "url_status": "live",
      "what_it_supports": "identity and sense of the item",
      "checked_by": "wikidata-api"
    },
    {
      "id": "wikipedia-en",
      "title": "Wikipedia: Cylinder",
      "url": "https://en.wikipedia.org/wiki/Cylinder",
      "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 cylinder is.",
        "rationale": "Geometry.",
        "layers": [
          {
            "id": "definition",
            "name": "Definition",
            "description": "Definition and variants.",
            "findings": [
              {
                "id": "definition-finding",
                "name": "Definition",
                "description": "Definition.",
                "questions": [
                  {
                    "text": "How is a cylinder defined, and how do right, oblique, open, closed and generalised cylinders differ?",
                    "kind": "definition"
                  },
                  {
                    "text": "Is the geometric solid or a mechanical part meant?",
                    "kind": "boundary"
                  }
                ]
              }
            ]
          },
          {
            "id": "properties",
            "name": "Properties",
            "description": "Properties.",
            "findings": [
              {
                "id": "properties-finding",
                "name": "Properties",
                "description": "Properties.",
                "questions": [
                  {
                    "text": "What symmetry, cross-section and developable surface properties does a cylinder have?",
                    "kind": "definition"
                  },
                  {
                    "text": "Which entry fits surfaces?",
                    "kind": "action"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "compute",
        "name": "Compute",
        "description": "Calculations.",
        "rationale": "Practice.",
        "layers": [
          {
            "id": "volume",
            "name": "Volume",
            "description": "Volume and area.",
            "findings": [
              {
                "id": "volume-finding",
                "name": "Volume",
                "description": "Volume.",
                "questions": [
                  {
                    "text": "What are the volume and surface area of this cylinder or semicylinder?",
                    "kind": "action"
                  },
                  {
                    "text": "Which entry fits volume?",
                    "kind": "action"
                  }
                ]
              }
            ]
          },
          {
            "id": "coordinates",
            "name": "Coordinates",
            "description": "Equations and coordinates.",
            "findings": [
              {
                "id": "coordinates-finding",
                "name": "Coordinates",
                "description": "Coordinates.",
                "questions": [
                  {
                    "text": "How are cylinders described by equations and cylindrical coordinates?",
                    "kind": "definition"
                  },
                  {
                    "text": "Which entry fits coordinate systems?",
                    "kind": "action"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "apply",
        "name": "Apply",
        "description": "Applications.",
        "rationale": "Engineering.",
        "layers": [
          {
            "id": "engineering",
            "name": "Engineering",
            "description": "Cylindrical objects.",
            "findings": [
              {
                "id": "engineering-finding",
                "name": "Engineering",
                "description": "Engineering.",
                "questions": [
                  {
                    "text": "How do cylindrical shapes appear in pipes, tanks, rollers and structures, and how are they engineered?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which entry fits pressure vessels?",
                    "kind": "action"
                  }
                ]
              }
            ]
          },
          {
            "id": "mechanical",
            "name": "Mechanical",
            "description": "Mechanical senses.",
            "findings": [
              {
                "id": "mechanical-finding",
                "name": "Mechanical",
                "description": "Mechanical.",
                "questions": [
                  {
                    "text": "What are engine cylinders, hydraulic cylinders and related parts?",
                    "kind": "definition"
                  },
                  {
                    "text": "Which entry fits engine cylinders?",
                    "kind": "action"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "learn",
        "name": "Learn",
        "description": "History and teaching.",
        "rationale": "Education.",
        "layers": [
          {
            "id": "history",
            "name": "History",
            "description": "History.",
            "findings": [
              {
                "id": "history-finding",
                "name": "History",
                "description": "History.",
                "questions": [
                  {
                    "text": "How did Archimedes and later mathematicians study the cylinder?",
                    "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 cylinders be taught with nets and models?",
                    "kind": "action"
                  },
                  {
                    "text": "Which misconceptions arise?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          }
        ]
      }
    ]
  },
  "openQuestions": [
    "Should mechanical cylinders be a separate entry?",
    "How should geometry resources be linked?",
    "How should engineering standards be linked?"
  ],
  "statistics": {
    "bundles": 4,
    "layers": 8,
    "findings": 8,
    "questions": 16
  }
}