{
    "model": {
        "rank": 3194,
        "code": "thing-q49005",
        "model_id": "vr.tr.curtain",
        "name": "curtain",
        "purpose": "Enable an agent to recognise a curtain, assess its coverage and condition, and determine suitable operation, care and replacement.",
        "family": "Thing Registry",
        "category": "Physical world and living systems",
        "status": "research-draft",
        "kind": "thing",
        "plane": "PHY",
        "domain": "PHY.OBJ",
        "industry": "",
        "version": "",
        "url": "/models/thing/q49005/",
        "tier": 2,
        "score": 89,
        "payload": {
            "layer": "wikidata",
            "aliases": [
                "false facade",
                "maku",
                "net curtain",
                "curtain fall",
                "hospital curtain",
                "noren",
                "train curtains",
                "safety curtain",
                "kabeshiro",
                "portière",
                "kichō",
                "parochet",
                "velum quadragesimale",
                "window valance",
                "jinmaku",
                "Roman shade",
                "shower curtain",
                "stage curtain",
                "bed curtain",
                "zejō",
                "hikimaku"
            ],
            "aliasCount": 21,
            "merged": 21,
            "knownIn": 89,
            "facets": null,
            "markers": [],
            "lexicalClass": "",
            "senseRank": null,
            "alsoRegisteredAs": "vr.tr.curtain",
            "source": {
                "dataset": "wikidata",
                "item": "Q49005",
                "url": "https://www.wikidata.org/wiki/Q49005",
                "license": "CC0 1.0"
            }
        },
        "research": {
            "vercy": "1.0-draft",
            "publication": {
                "status": "research-draft",
                "adjudicationStatus": "unreviewed",
                "publishableCanonical": false,
                "generatedAt": "2026-09-07T14:06:31Z",
                "providers": [
                    "Codex"
                ],
                "breadth": "recalled by Codex without web access - no source was read",
                "missingProviders": [],
                "pass": 2,
                "cost": {
                    "grok": {
                        "seconds": 30.2,
                        "error": "Reading additional input from stdin...\nOpenAI Codex v0.153.3\n--------\nworkdir: R:\\02_PROJECTS\\02_Meta_Models_Platforms\\Ver.cy\\current\\thing-registry-backlog\nmodel: gpt-6-astra\nprovider: openai\napproval: never\nsandbox: read-only\nreasoning effort: none\nreasoning summaries: none\nsession id: 01a07c2f-d807-7282-a54a-d24588e09e7b\n--------\nuser\nDescribe what is already known about one registered thing. Answer as JSON only, no prose around it.\n\nThing: curtain\nSense to describe: (none recorded)\nDomain code: PHY.OBJ\nAlso known as: (none)\n\n\nContext for this batch of 546 things:\n# Batch 003: 1001 register",
                        "usd": 0,
                        "recall": true
                    },
                    "codex": {
                        "seconds": 86.6,
                        "error": "Reading additional input from stdin...\nOpenAI Codex v0.153.3\n--------\nworkdir: R:\\02_PROJECTS\\02_Meta_Models_Platforms\\Ver.cy\\current\\thing-registry-backlog\nmodel: gpt-6-astra\nprovider: openai\napproval: never\nsandbox: read-only\nreasoning effort: none\nreasoning summaries: none\nsession id: 01a07c2f-d80e-7ec2-bf40-08315c095f98\n--------\nuser\nYou are drafting a Vercy meta-model for one registered thing. Answer as JSON only, no prose around it.\n\nThing: curtain\nRegistry id: vr.tr.curtain\nPlane / domain: PHY / PHY.OBJ\nRegistry definition: (none recorded)\nNames folded into this entry: (none)\n\n\nContext "
                    }
                }
            },
            "metaModel": {
                "id": "THING-Q49005",
                "registryId": "vr.tr.curtain",
                "name": "curtain",
                "version": "0.1.0-research.1",
                "entryKind": "thing",
                "family": "Thing Registry",
                "domain": [
                    "PHY.OBJ"
                ],
                "status": "research-draft"
            },
            "canonicalUrl": "https://ver.cy/models/thing/q49005/",
            "model": {
                "registry_id": "vr.tr.curtain",
                "name": "curtain",
                "purpose": "Enable an agent to recognise a curtain, assess its coverage and condition, and determine suitable operation, care and replacement.",
                "definition": "A curtain is a hanging, flexible panel, usually of textile, arranged to cover an opening, screen a space, or control light, visibility, or sound.",
                "scope_statement": "This model owns curtain as a kind of suspended, flexible panel or panel assembly used to cover an opening, screen a space or moderate light, visibility, splash or sound, including its attachment and movement interfaces.",
                "in_scope": [
                    "Window curtains and drapes, including sheer, lined and layered configurations",
                    "Curtains used to screen, divide or enclose interior spaces",
                    "Shower and stage curtains, with application-specific requirements recorded",
                    "Panel construction, suspension interfaces and opening mechanisms",
                    "Coverage, operating state, condition and suitability for the installed setting"
                ],
                "out_of_scope": [
                    "Blinds, shutters and rigid sliding partitions",
                    "Windows, doorways, shower enclosures and building structure",
                    "Standalone rails, poles, motors and building automation systems beyond their curtain interfaces",
                    "Textile manufacture and fabric as a material kind",
                    "Air curtains, curtain walls and metaphorical uses of curtain"
                ],
                "distinguishing_features": [
                    "The screening surface is a suspended flexible panel or assembly, rather than rigid shutters or separately adjustable slats.",
                    "Coverage is established by the hanging panel; drawing, lifting or gathering it may change that coverage.",
                    "The panel is installed to cover an opening or screen a space, distinguishing it from clothing, bedding and loose decorative fabric.",
                    "A textile curtain that lifts into folds may resemble a fabric blind; its operating construction and registry boundary require explicit classification."
                ],
                "characteristics": [
                    {
                        "name": "Application",
                        "kind": "category",
                        "unit_or_values": "window covering | doorway screen | room divider | shower screen | stage curtain | other specified",
                        "why_it_matters": "Determines which performance, operating and care questions apply."
                    },
                    {
                        "name": "Panel dimensions",
                        "kind": "measurement",
                        "unit_or_values": "finished width and hanging drop per panel, mm",
                        "why_it_matters": "Supports fit assessment and distinguishes fabric dimensions from installed coverage."
                    },
                    {
                        "name": "Installed coverage and gaps",
                        "kind": "measurement",
                        "unit_or_values": "covered width, centre overlap, side gaps and lower clearance, mm",
                        "why_it_matters": "Edge gaps can defeat privacy, light exclusion or splash containment."
                    },
                    {
                        "name": "Fullness ratio",
                        "kind": "measurement",
                        "unit_or_values": "dimensionless ratio of total flat panel width to intended covered span",
                        "why_it_matters": "Describes gathering and affects folds, appearance and the space occupied when open."
                    },
                    {
                        "name": "Panel construction",
                        "kind": "category",
                        "unit_or_values": "material composition; weave or sheet construction; lining; coating; seams; heading; weighted hem",
                        "why_it_matters": "Explains drape, attachment compatibility and care constraints."
                    },
                    {
                        "name": "Suspension interface",
                        "kind": "relation",
                        "unit_or_values": "panel heading connected to specified hooks, rings, eyelets, loops, pocket or carriers",
                        "why_it_matters": "Determines whether the panel can be supported and moved by the installed hardware."
                    },
                    {
                        "name": "Panel mass",
                        "kind": "measurement",
                        "unit_or_values": "kg per panel, with dry or wet condition stated",
                        "why_it_matters": "Informs support compatibility and handling."
                    },
                    {
                        "name": "Movement configuration",
                        "kind": "category",
                        "unit_or_values": "fixed | single-side draw | centre draw | vertical lift | other specified; manual or powered",
                        "why_it_matters": "Determines reachable coverage states and the required movement envelope."
                    },
                    {
                        "name": "Coverage state",
                        "kind": "state",
                        "unit_or_values": "open | partly covering | fully covering | detached; obstruction or jam recorded separately",
                        "why_it_matters": "Separates intended position from whether the curtain can move correctly."
                    },
                    {
                        "name": "Light and privacy performance",
                        "kind": "category",
                        "unit_or_values": "declared or measured light transmission and visibility screening, with lighting conditions and evidence",
                        "why_it_matters": "Privacy and room darkening cannot be inferred reliably from colour or fabric labels alone."
                    },
                    {
                        "name": "Application-specific performance evidence",
                        "kind": "relation",
                        "unit_or_values": "linked claim or test for splash resistance, acoustic behaviour, thermal behaviour or fire behaviour, including tested assembly and conditions",
                        "why_it_matters": "Keeps specialised suitability claims tied to the curtain construction and installation actually evaluated."
                    },
                    {
                        "name": "Condition",
                        "kind": "state",
                        "unit_or_values": "tears, seam failure, attachment damage, soiling, dampness, visible mould, fading or coating deterioration",
                        "why_it_matters": "Identifies loss of function and grounds decisions about cleaning, repair or replacement."
                    }
                ],
                "affordances": [
                    "Assess whether panel dimensions and suspension interfaces suit a specified opening.",
                    "Draw, gather or lift the curtain within its supported movement range.",
                    "Adjust overlap and hanging position to improve coverage and clearance.",
                    "Detach and rehang panels using the intended attachment method.",
                    "Choose cleaning, drying or repair actions from construction and care evidence.",
                    "Compare replacement panels against the required screening function and existing support system."
                ]
            },
            "sources": [],
            "structure": {
                "bundles": [
                    {
                        "id": "curtain-identity-and-application",
                        "name": "Curtain identity and application",
                        "description": "Establishes which physical curtain sense is represented and what it screens.",
                        "rationale": "A window drape, shower curtain and stage curtain share a hanging-panel form but serve different purposes.",
                        "layers": [
                            {
                                "id": "hanging-panel-boundary",
                                "name": "Hanging panel boundary",
                                "description": "Distinguishes curtains from neighbouring covering and partition kinds.",
                                "findings": [
                                    {
                                        "id": "screening-panel-form",
                                        "name": "Screening panel form",
                                        "description": "Record the flexible hanging surface and how its construction supports identification as a curtain.",
                                        "questions": [
                                            {
                                                "text": "What suspended flexible panel or panel assembly provides the screening surface?",
                                                "kind": "definition",
                                                "id": "screening-panel-form-q01"
                                            },
                                            {
                                                "text": "Which construction features distinguish this kind from a blind, shutter, door or loose fabric hanging?",
                                                "kind": "boundary",
                                                "id": "screening-panel-form-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "screened-opening-and-purpose",
                                "name": "Screened opening and purpose",
                                "description": "Connects the curtain to the opening or space and the effect sought.",
                                "findings": [
                                    {
                                        "id": "application-and-primary-function",
                                        "name": "Application and primary function",
                                        "description": "Record what the curtain covers and whether its principal purpose is privacy, light control, splash containment, spatial separation or staging.",
                                        "questions": [
                                            {
                                                "text": "Which opening, enclosure or spatial boundary is the curtain intended to screen?",
                                                "kind": "boundary",
                                                "id": "application-and-primary-function-q01"
                                            },
                                            {
                                                "text": "Which screening functions are required, and which are merely decorative or optional?",
                                                "kind": "definition",
                                                "id": "application-and-primary-function-q02"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "panel-construction-and-fit",
                        "name": "Panel construction and fit",
                        "description": "Describes panel makeup, dimensions, folds and installed coverage.",
                        "rationale": "Flat fabric width alone does not determine whether a hanging curtain covers its intended span.",
                        "layers": [
                            {
                                "id": "fabric-lining-and-edges",
                                "name": "Fabric, lining and edges",
                                "description": "Captures the curtain components that determine drape and service requirements.",
                                "findings": [
                                    {
                                        "id": "panel-build",
                                        "name": "Panel build",
                                        "description": "Record face material, lining, coatings, seams, heading and hem features without inferring performance from appearance.",
                                        "questions": [
                                            {
                                                "text": "What materials and construction details make up the panel, lining, heading and lower edge?",
                                                "kind": "definition",
                                                "id": "panel-build-q01"
                                            },
                                            {
                                                "text": "Which label, product record or inspection establishes that construction?",
                                                "kind": "provenance",
                                                "id": "panel-build-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "coverage-geometry",
                                "name": "Coverage geometry",
                                "description": "Relates finished panel dimensions to the opening and surrounding surfaces.",
                                "findings": [
                                    {
                                        "id": "span-fullness-and-clearance",
                                        "name": "Span, fullness and clearance",
                                        "description": "Record panel width and drop separately from covered span, overlaps and edge clearances.",
                                        "questions": [
                                            {
                                                "text": "What are the finished panel dimensions and intended covered span, and what fullness ratio follows?",
                                                "kind": "measurement",
                                                "id": "span-fullness-and-clearance-q01"
                                            },
                                            {
                                                "text": "What centre overlap, side gaps and lower clearance remain when the curtain is fully covering the opening?",
                                                "kind": "measurement",
                                                "id": "span-fullness-and-clearance-q02"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "suspension-and-movement",
                        "name": "Suspension and movement",
                        "description": "Connects the hanging panel to its support and describes how coverage changes.",
                        "rationale": "Heading compatibility, gathered bulk and movement clearance determine whether a curtain can operate as intended.",
                        "layers": [
                            {
                                "id": "heading-and-support-interface",
                                "name": "Heading and support interface",
                                "description": "Describes the attachment chain between curtain and support hardware.",
                                "findings": [
                                    {
                                        "id": "attachment-compatibility",
                                        "name": "Attachment compatibility",
                                        "description": "Record heading type, attachment distribution and supported panel mass.",
                                        "questions": [
                                            {
                                                "text": "How does the heading attach to rings, hooks, carriers or the pole itself?",
                                                "kind": "definition",
                                                "id": "attachment-compatibility-q01"
                                            },
                                            {
                                                "text": "What evidence shows that the attachment and support arrangement accommodates the panel mass and operating loads?",
                                                "kind": "provenance",
                                                "id": "attachment-compatibility-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "draw-path-and-position",
                                "name": "Draw path and position",
                                "description": "Captures travel direction, gathering space, actuation and actual coverage state.",
                                "findings": [
                                    {
                                        "id": "reachable-coverage-states",
                                        "name": "Reachable coverage states",
                                        "description": "Record how the curtain opens and closes, where gathered panels sit and what prevents travel.",
                                        "questions": [
                                            {
                                                "text": "How is the curtain moved, and where do its panels gather when open?",
                                                "kind": "definition",
                                                "id": "reachable-coverage-states-q01"
                                            },
                                            {
                                                "text": "How much travel and gathered-panel space are available before the curtain meets an obstruction?",
                                                "kind": "measurement",
                                                "id": "reachable-coverage-states-q02"
                                            },
                                            {
                                                "text": "Can the curtain reach the requested position without snagging, detaching or interfering with adjacent equipment?",
                                                "kind": "action",
                                                "id": "reachable-coverage-states-q03"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "screening-performance",
                        "name": "Screening performance",
                        "description": "Evaluates the effects of the panel and its installed gaps under relevant conditions.",
                        "rationale": "Curtain function depends on the complete hanging arrangement as well as the material.",
                        "layers": [
                            {
                                "id": "light-and-sightlines",
                                "name": "Light and sightlines",
                                "description": "Separates light transmission from visibility screening.",
                                "findings": [
                                    {
                                        "id": "installed-light-and-privacy-effect",
                                        "name": "Installed light and privacy effect",
                                        "description": "Record light exclusion and privacy with viewing direction, illumination and edge leakage stated.",
                                        "questions": [
                                            {
                                                "text": "Under which interior and exterior lighting conditions does the curtain prevent the required sightlines?",
                                                "kind": "measurement",
                                                "id": "installed-light-and-privacy-effect-q01"
                                            },
                                            {
                                                "text": "What evidence distinguishes light passing through the panel from light entering around its edges?",
                                                "kind": "provenance",
                                                "id": "installed-light-and-privacy-effect-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "specialised-screening-effects",
                                "name": "Specialised screening effects",
                                "description": "Handles splash, acoustic and thermal functions where the application requires them.",
                                "findings": [
                                    {
                                        "id": "application-specific-effectiveness",
                                        "name": "Application-specific effectiveness",
                                        "description": "Record each specialised claim with its mechanism, assessed assembly and limitations.",
                                        "questions": [
                                            {
                                                "text": "Does this application require splash containment, sound absorption, sound isolation or a thermal effect, and how is the required outcome defined?",
                                                "kind": "definition",
                                                "id": "application-specific-effectiveness-q01"
                                            },
                                            {
                                                "text": "What test or observation supports that outcome for the specified panel, gaps and installation?",
                                                "kind": "provenance",
                                                "id": "application-specific-effectiveness-q02"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "curtain-care-and-use-constraints",
                        "name": "Curtain care and use constraints",
                        "description": "Connects curtain deterioration and placement to permissible operation and care.",
                        "rationale": "Hanging textiles and sheets can lose fit or function through cleaning, dampness, damaged attachments or unsuitable placement.",
                        "layers": [
                            {
                                "id": "deterioration-and-care",
                                "name": "Deterioration and care",
                                "description": "Assesses panel damage and the compatibility of maintenance with its construction.",
                                "findings": [
                                    {
                                        "id": "clean-repair-or-replace",
                                        "name": "Clean, repair or replace",
                                        "description": "Record defects and care evidence before selecting an intervention.",
                                        "questions": [
                                            {
                                                "text": "Where are tears, failed seams, damaged headings, dampness or coating deterioration affecting coverage or suspension?",
                                                "kind": "measurement",
                                                "id": "clean-repair-or-replace-q01"
                                            },
                                            {
                                                "text": "Which cleaning, drying or repair actions are supported by the care instructions, including any effect on dimensions or treatments?",
                                                "kind": "action",
                                                "id": "clean-repair-or-replace-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "placement-and-safety-requirements",
                                "name": "Placement and safety requirements",
                                "description": "Identifies constraints arising from trailing fabric, operating cords, nearby heat and specialised uses.",
                                "findings": [
                                    {
                                        "id": "safe-installed-use",
                                        "name": "Safe installed use",
                                        "description": "Record actual exposure and applicable requirements without assuming every curtain needs the same certification.",
                                        "questions": [
                                            {
                                                "text": "Does the panel, hem or operating mechanism interfere with an exit, walking route, heat source or accessible cord arrangement?",
                                                "kind": "boundary",
                                                "id": "safe-installed-use-q01"
                                            },
                                            {
                                                "text": "Which documented fire-behaviour or operating-safety requirements apply to this location and curtain application?",
                                                "kind": "provenance",
                                                "id": "safe-installed-use-q02"
                                            },
                                            {
                                                "text": "What adjustment, repair or withdrawal from use is required by the observed condition and applicable instructions?",
                                                "kind": "action",
                                                "id": "safe-installed-use-q03"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "evidence-and-external-alignment",
                        "name": "Evidence and external alignment",
                        "description": "What the world already says about this thing, gathered so the model can be checked against it.",
                        "rationale": "A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.",
                        "layers": [
                            {
                                "id": "reported-evidence",
                                "name": "Reported evidence",
                                "description": "Findings from the breadth pass, kept separate from the structural claims.",
                                "findings": [
                                    {
                                        "id": "evidence-confidence-notes",
                                        "name": "Check these first",
                                        "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                                        "evidence": [
                                            "The selected sense is the flexible hanging furnishing or screen; no registry sense was supplied.",
                                            "Dimensions and fullness ratios are approximate domestic conventions, not requirements or limits for the category.",
                                            "Verify standard editions, local applicability, and the performance of the finished curtain assembly; blackout, thermal, acoustic, and fire-performance claims require separate evidence."
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-confidence-notes-q01",
                                                "text": "Which of these check these first hold for the sense of curtain this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-kinds",
                                        "name": "Kinds and varieties",
                                        "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                                        "evidence": [
                                            "Sheer curtains",
                                            "Blackout curtains",
                                            "Thermal curtains",
                                            "Shower curtains",
                                            "Stage curtains",
                                            "Acoustic curtains"
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-kinds-q01",
                                                "text": "Which of these kinds and varieties hold for the sense of curtain this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-standards-and-regulation",
                                        "name": "Standards and regulation",
                                        "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                                        "evidence": [
                                            "NFPA 701, issued by the National Fire Protection Association, specifies methods for testing flame propagation of textiles and films, including curtain materials within its scope.",
                                            "EN 13773, issued by the European Committee for Standardization (CEN), provides a classification scheme for the burning behaviour of curtains and drapes."
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-standards-and-regulation-q01",
                                                "text": "Which of these standards and regulation hold for the sense of curtain this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-real-world-use",
                                        "name": "Real-world use",
                                        "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                                        "evidence": [
                                            "Controlling daylight and providing privacy at windows.",
                                            "Reducing radiant heat exchange and draught discomfort near windows.",
                                            "Containing water spray around showers or baths.",
                                            "Concealing stage areas and supporting theatrical scene changes.",
                                            "Dividing spaces and, with suitable construction, absorbing sound."
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-real-world-use-q01",
                                                "text": "Which of these real-world use hold for the sense of curtain this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-measurements",
                                        "name": "Typical measurements",
                                        "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                                        "evidence": [
                                            {
                                                "quantity": "Finished drop of domestic window curtains",
                                                "typical_range": "Approximately 1.2-3.0; installation-dependent",
                                                "unit": "m"
                                            },
                                            {
                                                "quantity": "Fullness ratio: flat fabric width divided by covered track or pole width",
                                                "typical_range": "Approximately 1.5-2.5 for gathered domestic curtains",
                                                "unit": "dimensionless"
                                            }
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-measurements-q01",
                                                "text": "Which of these typical measurements hold for the sense of curtain this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-failure-modes-and-hazards",
                                        "name": "Failure modes and hazards",
                                        "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                                        "evidence": [
                                            "Ignition or flame spread when fabric contacts heaters, candles, or other ignition sources.",
                                            "Entanglement or strangulation involving accessible operating cords, particularly for children.",
                                            "Track, pole, or bracket failure from inadequate fixing or excessive loading.",
                                            "Tearing, seam failure, fading, or embrittlement through use, laundering, and sunlight exposure.",
                                            "Mould growth where curtains remain damp, especially in bathrooms or against condensation-prone windows."
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-failure-modes-and-hazards-q01",
                                                "text": "Which of these failure modes and hazards hold for the sense of curtain this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-regional-variation",
                                        "name": "Regional variation",
                                        "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                                        "evidence": [
                                            "In North American usage, 'drapes' often means heavier or lined window curtains; the distinction is not universal.",
                                            "Fire-performance requirements depend on jurisdiction and occupancy, with public venues often subject to specific requirements."
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-regional-variation-q01",
                                                "text": "Which of these regional variation hold for the sense of curtain this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-neighbours",
                                        "name": "Neighbouring kinds and how to tell them apart",
                                        "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                                        "evidence": [
                                            {
                                                "name": "blind",
                                                "difference": "A blind typically controls coverage through slats or a sheet that rolls or folds, whereas a curtain typically hangs in folds and draws along a support."
                                            },
                                            {
                                                "name": "shutter",
                                                "difference": "A shutter is a rigid panel or framed assembly rather than a flexible hanging panel."
                                            },
                                            {
                                                "name": "drape",
                                                "difference": "Often a synonym; where distinguished, a drape usually denotes a heavier, more formal, or lined curtain."
                                            },
                                            {
                                                "name": "curtain wall",
                                                "difference": "A curtain wall is a non-load-bearing exterior building enclosure, not a hanging textile furnishing."
                                            },
                                            {
                                                "name": "air curtain",
                                                "difference": "An air curtain uses a directed air stream across an opening rather than a physical hanging panel."
                                            }
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-neighbours-q01",
                                                "text": "Which of these neighbouring kinds and how to tell them apart hold for the sense of curtain this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    }
                ]
            },
            "openQuestions": [
                "Does the registry intend curtain to include flexible strip curtains and vertically lifting textile coverings, or do neighbouring registered kinds own those boundaries?",
                "Are specialised fire or smoke curtains covered by an existing model that should be linked instead of extended here?",
                "Which authoritative definitions and test methods should govern light exclusion, privacy, acoustic and thermal claims for each curtain application?",
                "Which jurisdictional and occupancy-specific requirements apply to curtain fire behaviour and operating mechanisms?",
                "How should performance evidence be carried forward after cleaning, relining, shortening or replacement of treatments?"
            ],
            "statistics": {
                "bundles": 6,
                "layers": 11,
                "findings": 18,
                "questions": 30
            }
        },
        "draft": {
            "generator": "vr.draft.v3",
            "status": "draft-generated",
            "researched": false,
            "archetype": "device, machine or tool",
            "method": "Written from the archetype playbook - what this kind of thing needs beyond identity and provenance - and from the structure that recurred across 6,333 models already researched by two engines. Applied to this entry by rule. No source was read for this thing and no claim here is researched. This entry carries no facets of its own, so they were inferred from its domain - a guess about a whole domain applied to one thing.",
            "facetsInferred": true,
            "nextPass": "A researcher replaces this draft with a sourced specification. Treat every sentence below as a proposal to argue with.",
            "purpose": "Give an agent a durable, checkable way to recognise a curtain, record what state it is in, and decide what may be done with it.",
            "whatItIs": "Enable an agent to recognise a curtain, assess its coverage and condition, and determine suitable operation, care and replacement.",
            "characteristics": {
                "substance": "material",
                "origin": "manufactured",
                "agency": "inert",
                "mobility": "varies"
            },
            "whatYouCanDoWithIt": [
                "observed and measured"
            ],
            "distinguishingFeatures": [
                "Names folded into this entry, which a task may need to split apart again: false facade, maku, net curtain, curtain fall, hospital curtain, noren, train curtains, safety curtain, kabeshiro, portière, kichō, parochet.",
                "21 finer distinctions are held as aliases rather than separate entries, because telling them apart needs a task that asks for it.",
                "Described in 89 Wikipedia languages, which is a measure of how widely the thing is known, not of how important it is."
            ],
            "openQuestionsForResearch": [
                "Which of the bundles below does a real task actually need, and which are ceremony?",
                "What does this thing have that the facets do not capture at all?",
                "Which neighbouring kind is most often confused with a curtain, and on what evidence are they told apart?"
            ],
            "whatItIsMadeOf": "matter you can touch",
            "physicalCharacter": [
                "Mobility varies between examples.",
                "Does nothing on its own; everything it does, something else did to it.",
                "These come from the domain this entry sits in rather than from the entry itself, so treat them as a first guess about the whole domain applied to one thing."
            ],
            "whatCanBeDoneWithIt": [
                "observe it, measure it, record its state"
            ],
            "howItIsRecognised": [
                "Recognised by form, by the arrangement of its controls, and by markings - a plate, a model number, a certification mark. Form alone rarely separates two models that do very different things."
            ],
            "relatedModels": [
                {
                    "relation": "covers",
                    "note": "Finer kinds folded into this entry because telling them apart needs a task that asks for it. Each is a model waiting to be split out when one does.",
                    "targets": [
                        "false facade",
                        "maku",
                        "net curtain",
                        "curtain fall",
                        "hospital curtain",
                        "noren",
                        "train curtains",
                        "safety curtain",
                        "kabeshiro",
                        "portière",
                        "kichō",
                        "parochet"
                    ]
                }
            ],
            "standing": "Described in 89 Wikipedia languages, which measures how widely it is written about rather than how important or how common it is. 21 finer distinctions are held inside this entry as names rather than as separate models.",
            "structure": {
                "bundles": [
                    {
                        "id": "identity-and-classification",
                        "name": "Identity, naming and classification",
                        "description": "How an agent tells one curtain from another, and a curtain from things that resemble it.",
                        "rationale": "Recognition comes before every other claim. Without stable identity nothing else in the model can be trusted to be about the same thing twice.",
                        "layers": [
                            {
                                "id": "naming-and-identifiers",
                                "name": "Names and identifiers",
                                "description": "The names this thing goes by and the identifiers that survive translation and time.",
                                "findings": [
                                    {
                                        "id": "preferred-name-and-aliases",
                                        "name": "Preferred name, aliases and local names",
                                        "description": "Which name to use, which names mean the same thing, and which merely sound similar.",
                                        "questions": [
                                            {
                                                "id": "preferred-name-and-aliases-q01",
                                                "text": "What identifies and describes the name of a curtain, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "preferred-name-and-aliases-q02",
                                                "text": "Who or what asserted this about the name of a curtain, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "preferred-name-and-aliases-q03",
                                                "text": "What may an agent decide or do once the name of a curtain is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    },
                                    {
                                        "id": "stable-identifiers",
                                        "name": "Stable identifiers and external keys",
                                        "description": "Identifiers that keep pointing at this kind of thing across systems and languages.",
                                        "questions": [
                                            {
                                                "id": "stable-identifiers-q01",
                                                "text": "What identifies and describes an identifier for a curtain, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "stable-identifiers-q02",
                                                "text": "Who or what asserted this about an identifier for a curtain, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "stable-identifiers-q03",
                                                "text": "What may an agent decide or do once an identifier for a curtain is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "classification-and-granularity",
                                "name": "Classification and granularity",
                                "description": "Where a curtain sits among kinds, and how finely a task needs to cut it.",
                                "findings": [
                                    {
                                        "id": "kind-and-parents",
                                        "name": "Kind, parents and neighbouring kinds",
                                        "description": "The classes this thing belongs to and the ones it is next to.",
                                        "questions": [
                                            {
                                                "id": "kind-and-parents-q01",
                                                "text": "What identifies and describes the kind of a curtain, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "kind-and-parents-q02",
                                                "text": "Who or what asserted this about the kind of a curtain, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "kind-and-parents-q03",
                                                "text": "What may an agent decide or do once the kind of a curtain is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    },
                                    {
                                        "id": "distinguishing-features",
                                        "name": "Distinguishing features",
                                        "description": "What separates a curtain from the things most often confused with it.",
                                        "questions": [
                                            {
                                                "id": "distinguishing-features-q01",
                                                "text": "What identifies and describes what distinguishes a curtain, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "distinguishing-features-q02",
                                                "text": "Who or what asserted this about what distinguishes a curtain, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "distinguishing-features-q03",
                                                "text": "What may an agent decide or do once what distinguishes a curtain is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "form-and-composition",
                        "name": "Form, composition and condition",
                        "description": "What a curtain is made of, what shape and size it takes, and what state it is in.",
                        "rationale": "A physical thing can be measured, and a model that cannot record its measurements cannot support any decision that depends on them.",
                        "layers": [
                            {
                                "id": "form-and-dimensions",
                                "name": "Form and dimensions",
                                "description": "Shape, size, mass and the ranges these take across examples.",
                                "findings": [
                                    {
                                        "id": "measurable-dimensions",
                                        "name": "Measurable dimensions and their units",
                                        "description": "The quantities worth recording and the units they are recorded in.",
                                        "questions": [
                                            {
                                                "id": "measurable-dimensions-q01",
                                                "text": "What identifies and describes the dimensions of a curtain, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "measurable-dimensions-q02",
                                                "text": "Who or what asserted this about the dimensions of a curtain, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "measurable-dimensions-q03",
                                                "text": "What may an agent decide or do once the dimensions of a curtain is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "material-and-composition",
                                "name": "Material and composition",
                                "description": "Materials, parts and how they are put together.",
                                "findings": [
                                    {
                                        "id": "parts-and-materials",
                                        "name": "Parts and materials",
                                        "description": "What a curtain is built from and which parts are replaceable.",
                                        "questions": [
                                            {
                                                "id": "parts-and-materials-q01",
                                                "text": "What identifies and describes the composition of a curtain, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "parts-and-materials-q02",
                                                "text": "Who or what asserted this about the composition of a curtain, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "parts-and-materials-q03",
                                                "text": "What may an agent decide or do once the composition of a curtain is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "condition-and-integrity",
                                "name": "Condition and integrity",
                                "description": "Wear, damage, health and the difference between working and broken.",
                                "findings": [
                                    {
                                        "id": "condition-assessment",
                                        "name": "Condition, damage and health",
                                        "description": "How the condition of a curtain is judged and by whom.",
                                        "questions": [
                                            {
                                                "id": "condition-assessment-q01",
                                                "text": "What identifies and describes the condition of a curtain, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "condition-assessment-q02",
                                                "text": "Who or what asserted this about the condition of a curtain, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "condition-assessment-q03",
                                                "text": "What may an agent decide or do once the condition of a curtain is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "place-and-movement",
                        "name": "Place and movement",
                        "description": "Where a curtain is, how it got there and where it may go (varies).",
                        "rationale": "A thing that can move needs its position recorded with a time, or every later claim about it is about a place it has left.",
                        "layers": [
                            {
                                "id": "location-and-placement",
                                "name": "Location and placement",
                                "description": "Position, containment and the reference frame the position is given in.",
                                "findings": [
                                    {
                                        "id": "position-and-frame",
                                        "name": "Position, container and reference frame",
                                        "description": "Where a curtain is, and what that position is measured against.",
                                        "questions": [
                                            {
                                                "id": "position-and-frame-q01",
                                                "text": "What identifies and describes the location of a curtain, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "position-and-frame-q02",
                                                "text": "Who or what asserted this about the location of a curtain, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "position-and-frame-q03",
                                                "text": "What may an agent decide or do once the location of a curtain is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "movement-and-transfer",
                                "name": "Movement and transfer",
                                "description": "How a curtain is carried, installed or relocated.",
                                "findings": [
                                    {
                                        "id": "movement-events",
                                        "name": "Movement events and constraints",
                                        "description": "What counts as a movement, what records it and what limits it.",
                                        "questions": [
                                            {
                                                "id": "movement-events-q01",
                                                "text": "What identifies and describes the movement of a curtain, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "movement-events-q02",
                                                "text": "Who or what asserted this about the movement of a curtain, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "movement-events-q03",
                                                "text": "What may an agent decide or do once the movement of a curtain is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "state-and-lifecycle",
                        "name": "State and lifecycle",
                        "description": "The states a curtain passes through and the events that move it between them.",
                        "rationale": "Most decisions about a thing depend on what state it is in now, which is a claim with a time on it, not a property.",
                        "layers": [
                            {
                                "id": "lifecycle-stages",
                                "name": "Lifecycle stages",
                                "description": "From coming into existence to ceasing to be one of these.",
                                "findings": [
                                    {
                                        "id": "stages-and-transitions",
                                        "name": "Stages and transitions",
                                        "description": "The stages worth naming and what moves a curtain between them.",
                                        "questions": [
                                            {
                                                "id": "stages-and-transitions-q01",
                                                "text": "What identifies and describes the lifecycle of a curtain, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "stages-and-transitions-q02",
                                                "text": "Who or what asserted this about the lifecycle of a curtain, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "stages-and-transitions-q03",
                                                "text": "What may an agent decide or do once the lifecycle of a curtain is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "observations-and-status",
                                "name": "Observations and current status",
                                "description": "What is observed about a curtain, how often and by whom.",
                                "findings": [
                                    {
                                        "id": "observation-record",
                                        "name": "Observation record",
                                        "description": "How an observation of a curtain is recorded so that it can be superseded rather than overwritten.",
                                        "questions": [
                                            {
                                                "id": "observation-record-q01",
                                                "text": "What identifies and describes an observation of a curtain, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "observation-record-q02",
                                                "text": "Who or what asserted this about an observation of a curtain, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "observation-record-q03",
                                                "text": "What may an agent decide or do once an observation of a curtain is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "function-and-principle",
                        "name": "Function and operating principle",
                        "description": "What curtain is for and how it achieves it.",
                        "rationale": "Two devices with the same name can work on different principles, and the principle is what predicts failure and constrains use.",
                        "layers": [
                            {
                                "id": "intended-function",
                                "name": "Intended function",
                                "description": "The job it does, and the jobs it is used for anyway.",
                                "findings": [
                                    {
                                        "id": "function-record",
                                        "name": "Function, principle and variants",
                                        "description": "What it does, how, and which variants do it differently.",
                                        "questions": [
                                            {
                                                "id": "function-record-q01",
                                                "text": "What function does curtain perform, on what operating principle, and which variants differ in that principle?",
                                                "kind": "definition"
                                            },
                                            {
                                                "id": "function-record-q02",
                                                "text": "What use falls outside the intended function but happens in practice?",
                                                "kind": "boundary"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "capacity-and-rating",
                                "name": "Capacity and rating",
                                "description": "The numbers that say what it can do and where it stops.",
                                "findings": [
                                    {
                                        "id": "ratings",
                                        "name": "Ratings and their conditions",
                                        "description": "Rated capacity, power, throughput and the conditions each assumes.",
                                        "questions": [
                                            {
                                                "id": "ratings-q01",
                                                "text": "What ratings characterise curtain, in what units, and under what stated conditions?",
                                                "kind": "measurement"
                                            },
                                            {
                                                "id": "ratings-q02",
                                                "text": "What happens beyond the rating - degradation, refusal, damage - and how is that detected?",
                                                "kind": "action"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "operation-and-state",
                        "name": "Operation, controls and state",
                        "description": "How curtain is operated and what state it is in right now.",
                        "rationale": "An agent acting on a device needs its current state and the controls that change it, not just its specification.",
                        "layers": [
                            {
                                "id": "controls-and-modes",
                                "name": "Controls and modes",
                                "description": "What can be set, what that changes, and what is interlocked.",
                                "findings": [
                                    {
                                        "id": "control-surface",
                                        "name": "Control surface and interlocks",
                                        "description": "The settings available and the conditions that block them.",
                                        "questions": [
                                            {
                                                "id": "control-surface-q01",
                                                "text": "What controls and modes does curtain have, and what does each change?",
                                                "kind": "definition"
                                            },
                                            {
                                                "id": "control-surface-q02",
                                                "text": "Which actions are interlocked or forbidden in which state, and what must be true before acting?",
                                                "kind": "action"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "condition-and-maintenance",
                                "name": "Condition and maintenance",
                                "description": "Wear, service intervals, consumables and the line between working and broken.",
                                "findings": [
                                    {
                                        "id": "service-record",
                                        "name": "Condition, service and consumables",
                                        "description": "What is consumed, what is serviced, and how condition is judged.",
                                        "questions": [
                                            {
                                                "id": "service-record-q01",
                                                "text": "What consumables and service does curtain need, at what interval, and on whose authority?",
                                                "kind": "measurement"
                                            },
                                            {
                                                "id": "service-record-q02",
                                                "text": "What evidence separates a unit that is working from one that is out of service?",
                                                "kind": "boundary"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "kind-model-unit",
                        "name": "Kind, model and unit",
                        "description": "Whether a claim about curtain is about the kind, a product line, or one physical unit.",
                        "rationale": "This is the boundary most often got wrong for made things, and getting it wrong mixes a catalogue entry with the machine in the yard.",
                        "layers": [
                            {
                                "id": "level-of-reference",
                                "name": "Level of reference",
                                "description": "The three levels and what belongs at each.",
                                "findings": [
                                    {
                                        "id": "level-rules",
                                        "name": "What belongs to kind, model and unit",
                                        "description": "Which properties are shared by all of them and which are not.",
                                        "questions": [
                                            {
                                                "id": "level-rules-q01",
                                                "text": "Which facts about curtain hold for every one of them, which for a model, and which only for one unit?",
                                                "kind": "boundary"
                                            },
                                            {
                                                "id": "level-rules-q02",
                                                "text": "What identifies an individual unit, and what should an agent do when it has only the kind?",
                                                "kind": "action"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "standards-and-conformity",
                                "name": "Standards and conformity",
                                "description": "The standards a working example must meet and who attests it.",
                                "findings": [
                                    {
                                        "id": "conformity",
                                        "name": "Standards, marks and attestation",
                                        "description": "Which standard applies, who certifies, and what the mark means.",
                                        "questions": [
                                            {
                                                "id": "conformity-q01",
                                                "text": "Which standards govern curtain, issued by whom, and what does conformity actually assert?",
                                                "kind": "provenance"
                                            },
                                            {
                                                "id": "conformity-q02",
                                                "text": "What may an agent conclude from a certification mark, and what may it not?",
                                                "kind": "boundary"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "provenance-and-evidence",
                        "name": "Provenance, evidence and time",
                        "description": "Where every claim about a curtain came from and when it held.",
                        "rationale": "A claim without a source and a time cannot be superseded, only overwritten, and an agent that overwrites loses the ability to explain itself.",
                        "layers": [
                            {
                                "id": "source-and-authority",
                                "name": "Source and authority",
                                "description": "Who said it, on what evidence, and how strongly.",
                                "findings": [
                                    {
                                        "id": "claim-provenance",
                                        "name": "Claim provenance and confidence",
                                        "description": "The authority behind each claim about a curtain and how confident it is.",
                                        "questions": [
                                            {
                                                "id": "claim-provenance-q01",
                                                "text": "What identifies and describes a claim about a curtain, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "claim-provenance-q02",
                                                "text": "Who or what asserted this about a claim about a curtain, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "claim-provenance-q03",
                                                "text": "What may an agent decide or do once a claim about a curtain is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "time-and-versions",
                                "name": "Time, versions and supersession",
                                "description": "When a claim was true, when it was learnt, and what replaced it.",
                                "findings": [
                                    {
                                        "id": "validity-and-supersession",
                                        "name": "Validity period and supersession",
                                        "description": "How an old claim about a curtain is retired without being erased.",
                                        "questions": [
                                            {
                                                "id": "validity-and-supersession-q01",
                                                "text": "What identifies and describes the validity of a claim about a curtain, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "validity-and-supersession-q02",
                                                "text": "Who or what asserted this about the validity of a claim about a curtain, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "validity-and-supersession-q03",
                                                "text": "What may an agent decide or do once the validity of a claim about a curtain is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    }
                ]
            },
            "statistics": {
                "bundles": 8,
                "layers": 17,
                "findings": 19,
                "questions": 51
            }
        }
    }
}