{
    "model": {
        "rank": 6507,
        "code": "thing-q181802",
        "model_id": "vr.tr.prosthesis",
        "name": "prosthesis",
        "purpose": "Enable an AI agent to recognise a prosthesis, assess its recorded suitability and condition for its intended replacement role, and identify actions permitted by its fitting, clinical and maintenance constraints.",
        "family": "Thing Registry",
        "category": "Physical world and living systems",
        "status": "research-draft",
        "kind": "thing",
        "plane": "PHY",
        "domain": "PHY.OBJ",
        "industry": "",
        "version": "",
        "url": "/models/thing/q181802/",
        "tier": 2,
        "score": 60,
        "payload": {
            "layer": "wikidata",
            "aliases": [
                "organ-on-a-chip",
                "lung on a chip",
                "tissue expansion device",
                "orthopedic prosthesis",
                "prosthetic joint implant",
                "dentures",
                "hip prosthesis",
                "ankle replacement",
                "knee prosthesis",
                "elbow prosthesis",
                "shoulder prosthesis",
                "metal-on-metal joint prosthesis",
                "removable denture",
                "Konus Krone",
                "complete denture",
                "removable partial denture",
                "telescopic crown",
                "telescopic denture",
                "Overdenture",
                "partial denture",
                "immediate complete denture",
                "upper complete denture",
                "lower complete denture",
                "removable partial metal denture",
                "artificial joint",
                "bone-anchored prosthesis",
                "veterinary prosthesis",
                "The Good Feet Store",
                "prosthodontics",
                "artificial organ",
                "3D printed prosthesis",
                "neuroprosthetics",
                "dental prosthesis",
                "testicular implant",
                "ossicular replacement prosthesis",
                "penile prosthesis",
                "testicular prosthesis",
                "automail",
                "epithesis",
                "ostomy pouching system"
            ],
            "aliasCount": 77,
            "merged": 77,
            "knownIn": 60,
            "facets": null,
            "markers": [],
            "lexicalClass": "",
            "senseRank": null,
            "alsoRegisteredAs": "vr.tr.prosthesis",
            "source": {
                "dataset": "wikidata",
                "item": "Q181802",
                "url": "https://www.wikidata.org/wiki/Q181802",
                "license": "CC0 1.0"
            }
        },
        "research": {
            "vercy": "1.0-draft",
            "publication": {
                "status": "research-draft",
                "adjudicationStatus": "unreviewed",
                "publishableCanonical": false,
                "generatedAt": "2026-09-07T15:03:09Z",
                "providers": [
                    "Codex",
                    "Grok"
                ],
                "missingProviders": [],
                "pass": 2,
                "cost": {
                    "grok": {
                        "usd": 0.01199078,
                        "turns": 1,
                        "seconds": 207.1,
                        "error": null
                    },
                    "codex": {
                        "seconds": 91.6,
                        "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: 01a07c5f-09ab-76e0-ba4e-e6fe27263fd0\n--------\nuser\nYou are drafting a Vercy meta-model for one registered thing. Answer as JSON only, no prose around it.\n\nThing: prosthesis\nRegistry id: vr.tr.prosthesis\nPlane / domain: PHY / PHY.OBJ\nRegistry definition: (none recorded)\nNames folded into this entry: (none)\n\nA V"
                    }
                }
            },
            "metaModel": {
                "id": "THING-Q181802",
                "registryId": "vr.tr.prosthesis",
                "name": "prosthesis",
                "version": "0.1.0-research.1",
                "entryKind": "thing",
                "family": "Thing Registry",
                "domain": [
                    "PHY.OBJ"
                ],
                "status": "research-draft"
            },
            "canonicalUrl": "https://ver.cy/models/thing/q181802/",
            "model": {
                "registry_id": "vr.tr.prosthesis",
                "name": "prosthesis",
                "purpose": "Enable an AI agent to recognise a prosthesis, assess its recorded suitability and condition for its intended replacement role, and identify actions permitted by its fitting, clinical and maintenance constraints.",
                "definition": "A manufactured medical device that substitutes for an absent or deficient body part, restoring some combination of load-bearing function, motor control, and appearance, whether worn externally at a residual-limb or mucosal interface (the ISO 8549 sense) or implanted or seated as an endoprosthesis, dental restoration, ocular form, or other anatomical replacement.",
                "scope_statement": "This model owns the identity, replacement role, configuration, bodily interfaces, functional capabilities, condition and use constraints of a physical device intended to substitute for an absent, removed or deficient body part, with applicability recorded for external and implanted forms.",
                "in_scope": [
                    "The body part, anatomical extent and side the prosthesis is intended to replace",
                    "External, removable and implanted configurations, including their constituent replacement components",
                    "Interfaces with the body and with attachment, retention or supporting systems",
                    "Intended functional and appearance outcomes and evidence of achieved performance",
                    "Fit, integrity, cleanliness, serviceability and restrictions on use or intervention"
                ],
                "out_of_scope": [
                    "The recipient's complete clinical history, diagnosis and treatment plan",
                    "Surgical procedures, rehabilitation programmes and clinician competency records",
                    "Orthoses whose primary role is supporting or correcting a retained body part",
                    "Standalone mobility aids and other assistive equipment that do not replace a body part",
                    "Biological grafts and transplanted organs",
                    "Manufacturing facilities and general inventory, procurement or reimbursement processes"
                ],
                "distinguishing_features": [
                    "An intended replacement role can be stated: which body part or anatomical portion it substitutes for and in what respect.",
                    "Its intended role includes substitution for a body part, rather than solely supporting, aligning or protecting a retained part; hybrid cases require explicit classification.",
                    "It is an engineered physical device rather than transplanted biological tissue; mixed constructions require a recorded boundary.",
                    "Its intended use identifies a bodily placement or attachment relationship, distinguishing it from an anatomical teaching replica.",
                    "Functional restoration is not the sole qualifying test: a device intended to replace bodily appearance may qualify even when it supplies no movement or load-bearing function."
                ],
                "characteristics": [
                    {
                        "name": "Replacement target",
                        "kind": "relation",
                        "unit_or_values": "Body part or anatomical portion, anatomical site and laterality where applicable",
                        "why_it_matters": "Establishes what makes this device a prosthesis and prevents confusion between incompatible sites or sides."
                    },
                    {
                        "name": "Replacement role",
                        "kind": "category",
                        "unit_or_values": "Load transfer, movement, articulation, fluid passage or containment, sensory contribution, appearance, other specified role; multiple values allowed",
                        "why_it_matters": "Determines which capabilities and limitations are relevant without assuming all prostheses perform the same function."
                    },
                    {
                        "name": "Placement and removability",
                        "kind": "category",
                        "unit_or_values": "External or implanted; recipient-removable, practitioner-removable or removal requiring a procedure; unknown",
                        "why_it_matters": "Controls which inspection, cleaning, adjustment and removal actions may be considered."
                    },
                    {
                        "name": "Recipient and fitting association",
                        "kind": "relation",
                        "unit_or_values": "Assigned recipient, intended site and applicable fitting or implantation record; unassigned or unknown",
                        "why_it_matters": "Separates device identity from evidence that this particular configuration suits a particular recipient."
                    },
                    {
                        "name": "Body interface and retention",
                        "kind": "category",
                        "unit_or_values": "Recorded contact surfaces and retention or fixation mechanisms, with applicable mating components",
                        "why_it_matters": "Identifies where attachment, pressure, movement or compatibility problems can arise."
                    },
                    {
                        "name": "Fit assessment",
                        "kind": "state",
                        "unit_or_values": "Not assessed, acceptable for a specified context, adjustment required, unacceptable or unknown; dated assessment and assessor",
                        "why_it_matters": "Makes suitability contextual and traceable rather than treating possession or attachment as proof of fit."
                    },
                    {
                        "name": "Performance envelope",
                        "kind": "measurement",
                        "unit_or_values": "Role-specific measures and units, such as load in N, motion in degrees or flow in mL/min, with test conditions; not applicable or unknown",
                        "why_it_matters": "Connects intended replacement function to documented limits and observed performance."
                    },
                    {
                        "name": "Actuation and energy dependence",
                        "kind": "category",
                        "unit_or_values": "Passive, body-powered, externally powered or other specified mechanism; energy source and operating dependencies where applicable",
                        "why_it_matters": "Identifies whether replacement function depends on power, control inputs or other supporting equipment."
                    },
                    {
                        "name": "Integrity and service state",
                        "kind": "state",
                        "unit_or_values": "Assessed serviceable, degraded, failed, awaiting assessment or retired; affected component and evidence",
                        "why_it_matters": "Distinguishes physical damage from poor fit and identifies whether repair, replacement or further assessment is needed."
                    },
                    {
                        "name": "Use authorisation",
                        "kind": "state",
                        "unit_or_values": "Pending assessment, authorised for recorded conditions, restricted, withdrawn or unknown; authority and supporting record",
                        "why_it_matters": "Prevents an agent from inferring permission to use a device solely from apparent physical condition."
                    }
                ],
                "affordances": [
                    "Identify the replacement target, recipient association and installed configuration.",
                    "Compare documented fit and performance evidence with the intended replacement role.",
                    "Check proposed components, attachments and accessories against recorded compatibility constraints.",
                    "Identify applicable instructions and prerequisites for donning, removal, cleaning, charging or storage.",
                    "Record symptoms, interface changes or device faults and route them to the appropriate assessment process.",
                    "Determine whether a proposed adjustment, repair, continued use or replacement has the required authority and supporting evidence."
                ]
            },
            "sources": [
                {
                    "id": "iso-8549-1-2020",
                    "title": "ISO 8549-1:2020 Prosthetics and orthotics - Vocabulary - Part 1: General terms for external limb prostheses and external orthoses",
                    "url": "https://www.iso.org/standard/79496.html",
                    "what_it_supports": "Core externally applied definition; the orthosis/prosthesis distinction used in P&O practice.",
                    "url_status": "blocked"
                },
                {
                    "id": "iso-10328-2016",
                    "title": "ISO 10328:2016 Prosthetics - Structural testing of lower-limb prostheses - Requirements and test methods",
                    "url": "",
                    "what_it_supports": "Structural test levels tied to user body mass; component fracture as a governed failure mode."
                },
                {
                    "id": "iso-22523-2006",
                    "title": "ISO 22523:2006 External limb prostheses and external orthoses - Requirements and test methods",
                    "url": "",
                    "what_it_supports": "Safety and performance requirements for external limb devices, including powered systems."
                },
                {
                    "id": "who-p-and-o-2017",
                    "title": "WHO standards for prosthetics and orthotics (World Health Organization, 2017)",
                    "url": "https://www.who.int/publications/i/item/9789241512480",
                    "what_it_supports": "Service-delivery practice, low-resource fitting systems, and the global clinical use case.",
                    "url_status": "live"
                },
                {
                    "id": "fda-21cfr-890",
                    "title": "21 CFR 890.3420 External limb prosthetic components; 21 CFR 890.3500 External assembled lower limb prosthesis (U.S. FDA)",
                    "url": "https://www.ecfr.gov/current/title-21/part-890/section-890.3420",
                    "what_it_supports": "U.S. device classification for external limb prostheses and related product-code family.",
                    "url_status": "live"
                },
                {
                    "id": "eu-mdr-2017-745",
                    "title": "Regulation (EU) 2017/745 on medical devices (European Union)",
                    "url": "https://eur-lex.europa.eu/eli/reg/2017/745/oj",
                    "what_it_supports": "Placing on the market of prosthetic medical devices in the EEA, including implantable kinds.",
                    "url_status": "live"
                },
                {
                    "id": "iso-9999-2022",
                    "title": "ISO 9999:2022 Assistive products - Classification and terminology",
                    "url": "",
                    "what_it_supports": "Assistive-product class 06 (orthoses and prostheses) as a naming scheme for external devices."
                },
                {
                    "id": "wikidata-q181802",
                    "title": "Wikidata item Prosthesis (Q181802)",
                    "url": "https://www.wikidata.org/wiki/Q181802",
                    "what_it_supports": "Cross-catalogue identifier for the general concept.",
                    "url_status": "live"
                }
            ],
            "structure": {
                "bundles": [
                    {
                        "id": "replacement-identity",
                        "name": "Replacement identity",
                        "description": "Establishes what bodily absence or deficiency the device addresses and the boundary of the prosthesis being modelled.",
                        "rationale": "A prosthesis is recognised through its intended bodily substitution, not through material, shape or powered operation alone.",
                        "layers": [
                            {
                                "id": "anatomical-substitution",
                                "name": "Anatomical substitution",
                                "description": "Records the target anatomy and the respects in which the prosthesis substitutes for it.",
                                "findings": [
                                    {
                                        "id": "replacement-target-and-role",
                                        "name": "Replacement target and role",
                                        "description": "The record must distinguish anatomical replacement from the particular functions or appearance the device is intended to provide.",
                                        "questions": [
                                            {
                                                "text": "Which body part or anatomical portion, site and side is this prosthesis intended to replace?",
                                                "kind": "definition",
                                                "id": "replacement-target-and-role-q01"
                                            },
                                            {
                                                "text": "Which functions or appearance attributes are intended to be substituted, and which are explicitly not provided?",
                                                "kind": "boundary",
                                                "id": "replacement-target-and-role-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "prosthesis-boundary",
                                "name": "Prosthesis boundary",
                                "description": "Distinguishes the complete prosthesis from its components, bodily supports and neighbouring device categories.",
                                "findings": [
                                    {
                                        "id": "device-extent-and-classification",
                                        "name": "Device extent and classification",
                                        "description": "The record must explain what counts as this prosthesis, including any hybrid replacement and support roles.",
                                        "questions": [
                                            {
                                                "text": "Does this record identify a complete prosthesis, a replacement component or an assembly, and which parts belong within its boundary?",
                                                "kind": "boundary",
                                                "id": "device-extent-and-classification-q01"
                                            },
                                            {
                                                "text": "What documented intended purpose distinguishes it from an orthosis, assistive aid, graft or anatomical replica?",
                                                "kind": "provenance",
                                                "id": "device-extent-and-classification-q02"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "bodily-integration",
                        "name": "Bodily integration",
                        "description": "Describes placement, retention and the evidence connecting this configuration to its recipient.",
                        "rationale": "Replacement capability depends on the prosthesis's relationship with the body, and cannot be established from the device specification alone.",
                        "layers": [
                            {
                                "id": "contact-and-fixation",
                                "name": "Contact and fixation",
                                "description": "Records bodily contact, load or motion transfer, and retention or fixation mechanisms.",
                                "findings": [
                                    {
                                        "id": "interface-arrangement",
                                        "name": "Interface arrangement",
                                        "description": "The model must identify the interfaces through which the prosthesis remains positioned and performs its replacement role.",
                                        "questions": [
                                            {
                                                "text": "Where does the prosthesis contact or connect to the body, and how is it retained or fixed at each interface?",
                                                "kind": "definition",
                                                "id": "interface-arrangement-q01"
                                            },
                                            {
                                                "text": "Which retained tissues, implants, sockets, abutments or other supports does that arrangement depend on?",
                                                "kind": "boundary",
                                                "id": "interface-arrangement-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "recipient-specific-fit",
                                "name": "Recipient-specific fit",
                                "description": "Connects suitability to a recipient, configuration, assessment date and intended activity or condition.",
                                "findings": [
                                    {
                                        "id": "fit-evidence-and-change",
                                        "name": "Fit evidence and change",
                                        "description": "Fit must be represented as an evidenced, time-dependent relationship rather than an intrinsic permanent property.",
                                        "questions": [
                                            {
                                                "text": "Who assessed fit for this recipient and configuration, when, and for which intended conditions of use?",
                                                "kind": "provenance",
                                                "id": "fit-evidence-and-change-q01"
                                            },
                                            {
                                                "text": "What recorded observations indicate a change in contact, retention, alignment, comfort or surrounding tissue since that assessment?",
                                                "kind": "measurement",
                                                "id": "fit-evidence-and-change-q02"
                                            },
                                            {
                                                "text": "Which documented changes require reassessment before further use or adjustment?",
                                                "kind": "action",
                                                "id": "fit-evidence-and-change-q03"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "replacement-performance",
                        "name": "Replacement performance",
                        "description": "Captures intended outcomes, observed performance and dependencies required to deliver them.",
                        "rationale": "Different prostheses replace different aspects of anatomy, so useful state assessment must follow the specific replacement role.",
                        "layers": [
                            {
                                "id": "role-specific-capability",
                                "name": "Role-specific capability",
                                "description": "Describes performance using measures appropriate to the replaced function or appearance.",
                                "findings": [
                                    {
                                        "id": "capability-evidence",
                                        "name": "Capability evidence",
                                        "description": "The record must separate intended capability, documented limits and observed outcomes.",
                                        "questions": [
                                            {
                                                "text": "Which measures or assessment criteria establish whether this prosthesis delivers its intended replacement function or appearance?",
                                                "kind": "measurement",
                                                "id": "capability-evidence-q01"
                                            },
                                            {
                                                "text": "Under what test or use conditions were those outcomes observed, and how do they relate to documented operating limits?",
                                                "kind": "provenance",
                                                "id": "capability-evidence-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "control-and-dependencies",
                                "name": "Control and dependencies",
                                "description": "Records how replacement function is produced and what happens when supporting inputs are unavailable.",
                                "findings": [
                                    {
                                        "id": "functional-dependency-state",
                                        "name": "Functional dependency state",
                                        "description": "Applicable power, control, calibration and supporting-component dependencies must be linked to the functions they enable.",
                                        "questions": [
                                            {
                                                "text": "Which functions are passive, body-powered or externally powered, and what control inputs or supporting components do they require?",
                                                "kind": "definition",
                                                "id": "functional-dependency-state-q01"
                                            },
                                            {
                                                "text": "What documented behaviour and permitted response apply if power, control, calibration or a required supporting component is unavailable?",
                                                "kind": "action",
                                                "id": "functional-dependency-state-q02"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "configuration-and-condition",
                        "name": "Configuration and condition",
                        "description": "Tracks the fitted assembly and evidence of physical or hygienic changes affecting bodily replacement.",
                        "rationale": "A component substitution, wear pattern or contact-surface change can alter the suitability of a prosthesis even when its overall identity stays the same.",
                        "layers": [
                            {
                                "id": "fitted-configuration",
                                "name": "Fitted configuration",
                                "description": "Identifies components and settings that define the configuration assessed for use.",
                                "findings": [
                                    {
                                        "id": "configuration-traceability",
                                        "name": "Configuration traceability",
                                        "description": "The current assembly must be distinguishable from earlier or proposed configurations and linked to relevant compatibility evidence.",
                                        "questions": [
                                            {
                                                "text": "Which components, sizes, materials, alignment settings and software versions, where applicable, define the current fitted configuration?",
                                                "kind": "definition",
                                                "id": "configuration-traceability-q01"
                                            },
                                            {
                                                "text": "What evidence supports compatibility among these components and the recipient's attachment or fixation arrangement?",
                                                "kind": "provenance",
                                                "id": "configuration-traceability-q02"
                                            },
                                            {
                                                "text": "Which proposed substitutions or setting changes require a new fitting, calibration or clinical assessment?",
                                                "kind": "action",
                                                "id": "configuration-traceability-q03"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "degradation-and-cleanliness",
                                "name": "Degradation and cleanliness",
                                "description": "Records observable condition and assessment limits for accessible and inaccessible parts.",
                                "findings": [
                                    {
                                        "id": "condition-evidence",
                                        "name": "Condition evidence",
                                        "description": "Condition assessment must identify affected parts and distinguish direct observations from reports or indirect evidence.",
                                        "questions": [
                                            {
                                                "text": "What evidence records wear, cracking, loosening, leakage, corrosion, contamination or other degradation relevant to this prosthesis?",
                                                "kind": "measurement",
                                                "id": "condition-evidence-q01"
                                            },
                                            {
                                                "text": "Which surfaces or internal parts cannot be directly inspected, and what assessment method or uncertainty is recorded for them?",
                                                "kind": "boundary",
                                                "id": "condition-evidence-q02"
                                            },
                                            {
                                                "text": "What cleaning, servicing or specialist assessment is specified for the affected interface or component?",
                                                "kind": "action",
                                                "id": "condition-evidence-q03"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "permitted-use-and-intervention",
                        "name": "Permitted use and intervention",
                        "description": "Connects use, handling and intervention decisions to applicable instructions and responsible authorities.",
                        "rationale": "External removable and implanted prostheses permit very different actions, and apparent serviceability does not establish permission to intervene.",
                        "layers": [
                            {
                                "id": "use-context-and-handling",
                                "name": "Use context and handling",
                                "description": "Defines authorised use conditions and actions available to the recipient, caregiver or practitioner.",
                                "findings": [
                                    {
                                        "id": "use-and-removal-constraints",
                                        "name": "Use and removal constraints",
                                        "description": "The model must retain device-specific conditions governing activity, handling and removal.",
                                        "questions": [
                                            {
                                                "text": "Which activities, environments and exposure conditions are permitted or restricted by the applicable instructions and recipient-specific assessment?",
                                                "kind": "boundary",
                                                "id": "use-and-removal-constraints-q01"
                                            },
                                            {
                                                "text": "Who may fit, don, remove, clean, charge or adjust this prosthesis, and what prerequisites apply to each relevant action?",
                                                "kind": "action",
                                                "id": "use-and-removal-constraints-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "reassessment-and-disposition",
                                "name": "Reassessment and disposition",
                                "description": "Records how concerns lead to review, servicing, replacement or retirement without presuming those actions are interchangeable.",
                                "findings": [
                                    {
                                        "id": "intervention-decision",
                                        "name": "Intervention decision",
                                        "description": "Proposed interventions must be linked to the observed concern, applicable instructions and the authority responsible for the decision.",
                                        "questions": [
                                            {
                                                "text": "What evidence and responsible authority support the current decision to continue use, restrict use, seek assessment, repair, replace or retire the prosthesis?",
                                                "kind": "provenance",
                                                "id": "intervention-decision-q01"
                                            },
                                            {
                                                "text": "What documented response applies to the reported malfunction or bodily-interface concern, including whether removal itself requires a practitioner or procedure?",
                                                "kind": "action",
                                                "id": "intervention-decision-q02"
                                            },
                                            {
                                                "text": "What verification is required before the prosthesis returns to use after an adjustment, repair or component replacement?",
                                                "kind": "action",
                                                "id": "intervention-decision-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-kinds",
                                        "name": "Kinds and varieties",
                                        "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.",
                                        "evidence": [
                                            "Lower-limb (partial-foot, transtibial, knee-disarticulation, transfemoral, hip-disarticulation/hemipelvectomy)",
                                            "Upper-limb (partial-hand, transradial, transhumeral, shoulder-disarticulation; passive, body-powered, myoelectric, hybrid)",
                                            "Activity-specific limb devices (running blades, swim, occupational/tool terminals)",
                                            "Joint-replacement endoprostheses (hip, knee, shoulder, and related arthroplasty implants)",
                                            "Dental and maxillofacial prostheses (fixed, removable, implant-supported; obturators and facial restorations)",
                                            "Ocular and orbital prostheses",
                                            "Breast and other soft-tissue prostheses (external forms and implants)",
                                            "Cardiac valve and vascular prostheses"
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-kinds-q01",
                                                "text": "Which of these kinds and varieties hold for the sense of prosthesis this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-identifiers",
                                        "name": "Identifiers and schemes",
                                        "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.",
                                        "evidence": [
                                            {
                                                "scheme": "Wikidata",
                                                "value_or_pattern": "Q181802",
                                                "note": "Item 'prosthesis'; narrower items exist for limb, dental, ocular, and joint kinds."
                                            },
                                            {
                                                "scheme": "SNOMED CT",
                                                "value_or_pattern": "53350007",
                                                "note": "Prosthesis, device (physical object); descendants cover anatomical and implant subtypes."
                                            },
                                            {
                                                "scheme": "MeSH",
                                                "value_or_pattern": "D011474",
                                                "note": "Prostheses and Implants (broader heading that also covers implants)."
                                            },
                                            {
                                                "scheme": "ISO 9999",
                                                "value_or_pattern": "06 18 / 06 24",
                                                "note": "Upper-limb and lower-limb prostheses under class 06 Orthoses and prostheses; dental, ocular, and implants sit elsewhere."
                                            },
                                            {
                                                "scheme": "HS / Harmonized System",
                                                "value_or_pattern": "9021.21 / 9021.31 / 9021.39",
                                                "note": "Artificial teeth; artificial joints; other artificial parts of the body."
                                            },
                                            {
                                                "scheme": "HCPCS Level II",
                                                "value_or_pattern": "L5000-L5999; L6000-L6999; L8000-L8039",
                                                "note": "U.S. billing codes for lower-limb, upper-limb, and external breast prostheses."
                                            },
                                            {
                                                "scheme": "FDA product code",
                                                "value_or_pattern": "ISW (and related 21 CFR 890 prosthetic codes)",
                                                "note": "External assembled lower-limb prosthesis family; joint implants are coded under 21 CFR 888."
                                            }
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-identifiers-q01",
                                                "text": "Which of these identifiers and schemes hold for the sense of prosthesis this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-standards-and-regulation",
                                        "name": "Standards and regulation",
                                        "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.",
                                        "evidence": [
                                            "ISO 8549 series (ISO) - vocabulary for external limb prostheses and orthoses",
                                            "ISO 10328 (ISO) - structural testing of lower-limb prostheses",
                                            "ISO 22675 (ISO) - cyclic testing of ankle-foot devices and foot units",
                                            "ISO 22523 (ISO) - requirements and test methods for external limb prostheses and orthoses",
                                            "ISO 13405 series (ISO) - classification and description of prosthetic components",
                                            "ISO 21534 / 21535 / 21536 and ISO 7206 / 14243 (ISO) - joint-replacement implant requirements and test methods",
                                            "ISO 5840 series (ISO) - cardiac valve prostheses",
                                            "Regulation (EU) 2017/745 MDR (European Union) - medical-device placing on the market, including implantable prostheses",
                                            "21 CFR 890 Subpart D and 21 CFR 888 (U.S. FDA) - physical-medicine prosthetic devices and orthopaedic implants",
                                            "WHO standards for prosthetics and orthotics (World Health Organization, 2017) - service provision rather than device design"
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-standards-and-regulation-q01",
                                                "text": "Which of these standards and regulation hold for the sense of prosthesis this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-real-world-use",
                                        "name": "Real-world use",
                                        "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.",
                                        "evidence": [
                                            "Fitted after amputation for dysvascular disease, trauma, tumour, or infection, or for congenital limb difference, then used for standing, walking, grasping, or cosmesis in daily life.",
                                            "Total hip and knee replacements implanted for osteoarthritis, fracture, and revision arthroplasty.",
                                            "Removable dentures, crowns, bridges, and implant-supported restorations replacing missing teeth.",
                                            "External silicone breast forms after mastectomy, and implanted breast prostheses in reconstruction or augmentation.",
                                            "Custom ocular prostheses after evisceration or enucleation; craniofacial restorations after tumour or trauma.",
                                            "Mechanical and bioprosthetic heart valves implanted for valvular disease.",
                                            "ICRC-type polypropylene modular limbs and Jaipur-style feet in conflict, disaster, and low-resource programmes.",
                                            "Paralympic and recreational sport (running blades, activity-specific terminals) as a distinct fitting pathway."
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-real-world-use-q01",
                                                "text": "Which of these real-world use hold for the sense of prosthesis this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-measurements",
                                        "name": "Typical measurements",
                                        "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.",
                                        "evidence": [
                                            {
                                                "quantity": "Mass of a complete adult transtibial prosthesis",
                                                "typical_range": "1.0-2.5",
                                                "unit": "kg"
                                            },
                                            {
                                                "quantity": "Mass of a complete adult transfemoral prosthesis",
                                                "typical_range": "2.0-4.5",
                                                "unit": "kg"
                                            },
                                            {
                                                "quantity": "User body mass covered by common ISO 10328 structural load levels",
                                                "typical_range": "45-125",
                                                "unit": "kg"
                                            },
                                            {
                                                "quantity": "Peak socket-residual-limb interface pressure",
                                                "typical_range": "100-350",
                                                "unit": "kPa"
                                            },
                                            {
                                                "quantity": "Hip femoral-head diameter (modular endoprosthesis)",
                                                "typical_range": "22-36",
                                                "unit": "mm"
                                            },
                                            {
                                                "quantity": "Heart-valve labelled tissue-annulus size",
                                                "typical_range": "19-33",
                                                "unit": "mm"
                                            },
                                            {
                                                "quantity": "External breast-form / implant fill volume",
                                                "typical_range": "150-700",
                                                "unit": "mL"
                                            },
                                            {
                                                "quantity": "Community-ambulator walking activity",
                                                "typical_range": "2000-7000",
                                                "unit": "steps/day"
                                            }
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-measurements-q01",
                                                "text": "Which of these typical measurements hold for the sense of prosthesis this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-failure-modes-and-hazards",
                                        "name": "Failure modes and hazards",
                                        "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.",
                                        "evidence": [
                                            "Socket misfit and residual-limb volume change causing pistoning, skin breakdown, blistering, or pressure injury.",
                                            "Suspension failure and falls from alignment error, prosthetic-knee instability, or foot/keel breakage.",
                                            "Fatigue or overload fracture of pylons, adapters, keels, or knee axes (the hazard ISO 10328 is written to bound).",
                                            "Upper-limb device abandonment after poor control, weight, or cosmetic mismatch.",
                                            "Contact dermatitis, liner folliculitis, and (less often) metal allergy at the interface.",
                                            "Periprosthetic joint infection, aseptic loosening, and wear-debris osteolysis or adverse local tissue reaction in joint implants.",
                                            "Breast-implant rupture and capsular contracture.",
                                            "Prosthetic-valve thrombosis, endocarditis, and structural valve deterioration.",
                                            "Myoelectric electrode lift-off, control dropout, or battery exhaustion in powered limbs."
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-failure-modes-and-hazards-q01",
                                                "text": "Which of these failure modes and hazards hold for the sense of prosthesis this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-regional-variation",
                                        "name": "Regional variation",
                                        "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.",
                                        "evidence": [
                                            "United States: 'prosthetic' is often a noun; Medicare K-levels (K0-K4) and HCPCS L-codes gate payment; prior authorization is routine.",
                                            "United Kingdom, Ireland, Australia, New Zealand: the clinician is a prosthetist; older NHS language is 'artificial limb' and 'limb fitting centre'.",
                                            "German-speaking social insurance: sharp Prothese vs Orthese split; external devices listed in the GKV Hilfsmittelverzeichnis (product group 24).",
                                            "Continental Europe commonly says 'endoprosthesis' for joint implants; U.S. practice says replacement or implant.",
                                            "South Asia: Jaipur-type vulcanized-rubber feet remain widely used; many programmes still build conventional (non-modular) sockets.",
                                            "ICRC and similar humanitarian services standardise polypropylene modular technology rather than carbon-fibre sport components.",
                                            "Myoelectric upper-limb provision is relatively high in parts of Western Europe and Japan; body-powered fittings remain common in U.S. workers' compensation and in most LMICs."
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-regional-variation-q01",
                                                "text": "Which of these regional variation hold for the sense of prosthesis this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-neighbours",
                                        "name": "Neighbouring kinds and how to tell them apart",
                                        "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.",
                                        "evidence": [
                                            {
                                                "name": "Orthosis",
                                                "difference": "The anatomical segment is still present; the device supports, aligns, or unloads it. Test: is the body part absent or only deficient in function?"
                                            },
                                            {
                                                "name": "Powered exoskeleton",
                                                "difference": "Worn over intact or paretic limbs to add power or constraint, not a substitute for a missing segment."
                                            },
                                            {
                                                "name": "Autologous reconstruction (flap, graft)",
                                                "difference": "Living host tissue rather than a manufactured substitute; no serial device identifier or ISO 10328-type structural test."
                                            },
                                            {
                                                "name": "Allograft / transplant",
                                                "difference": "Biological donor tissue, not a device; regulated as tissue or organ, not as a prosthesis under ISO 8549."
                                            },
                                            {
                                                "name": "Facial epithesis",
                                                "difference": "Surface-applied, usually non-load-bearing restoration of facial soft tissue; overlaps craniofacial prosthesis but is distinguished from limb and joint devices by lacking a residual-limb or articular load path."
                                            },
                                            {
                                                "name": "Osseointegration abutment (percutaneous implant)",
                                                "difference": "The pin is an implant that anchors an external limb; the distal worn device remains the prosthesis. Test: which part is inside bone versus coupled after the skin penetration?"
                                            },
                                            {
                                                "name": "Wheelchair, crutch, or other mobility aid",
                                                "difference": "Compensates locomotion without replacing the missing limb as a worn anatomical substitute."
                                            }
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-neighbours-q01",
                                                "text": "Which of these neighbouring kinds and how to tell them apart hold for the sense of prosthesis this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    }
                ]
            },
            "openQuestions": [
                "Does the registry intend prosthesis to include all internal replacement devices, including replacement valves and lenses, or does it assign some of these to neighbouring registered things?",
                "Where should the registry place hybrid devices that combine replacement, orthotic support and biological material?",
                "Which existing Vercy world models already own any of this concept, and should this registry entry link to them rather than introduce a separate publication?",
                "Which authoritative sources should establish subtype-specific performance criteria, inspection methods and intervention constraints?",
                "How should recipient-reported comfort and appearance outcomes, practitioner assessments and device measurements be reconciled when they disagree?"
            ],
            "statistics": {
                "bundles": 6,
                "layers": 11,
                "findings": 18,
                "questions": 32
            }
        },
        "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 prosthesis, record what state it is in, and decide what may be done with it.",
            "whatItIs": "Enable an AI agent to recognise a prosthesis, assess its recorded suitability and condition for its intended replacement role, and identify actions permitted by its fitting, clinical and maintenance constraints.",
            "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: organ-on-a-chip, lung on a chip, tissue expansion device, orthopedic prosthesis, prosthetic joint implant, dentures, hip prosthesis, ankle replacement, knee prosthesis, elbow prosthesis, shoulder prosthesis, metal-on-metal joint prosthesis.",
                "77 finer distinctions are held as aliases rather than separate entries, because telling them apart needs a task that asks for it.",
                "Described in 60 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 prosthesis, 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": [
                        "organ-on-a-chip",
                        "lung on a chip",
                        "tissue expansion device",
                        "orthopedic prosthesis",
                        "prosthetic joint implant",
                        "dentures",
                        "hip prosthesis",
                        "ankle replacement",
                        "knee prosthesis",
                        "elbow prosthesis",
                        "shoulder prosthesis",
                        "metal-on-metal joint prosthesis"
                    ]
                }
            ],
            "standing": "Described in 60 Wikipedia languages, which measures how widely it is written about rather than how important or how common it is. 77 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 prosthesis from another, and a prosthesis 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 prosthesis, 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 prosthesis, 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 prosthesis 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 prosthesis, 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 prosthesis, 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 prosthesis 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 prosthesis 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 prosthesis, 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 prosthesis, 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 prosthesis 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 prosthesis from the things most often confused with it.",
                                        "questions": [
                                            {
                                                "id": "distinguishing-features-q01",
                                                "text": "What identifies and describes what distinguishes a prosthesis, 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 prosthesis, 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 prosthesis 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 prosthesis 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 prosthesis, 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 prosthesis, 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 prosthesis 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 prosthesis is built from and which parts are replaceable.",
                                        "questions": [
                                            {
                                                "id": "parts-and-materials-q01",
                                                "text": "What identifies and describes the composition of a prosthesis, 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 prosthesis, 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 prosthesis 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 prosthesis is judged and by whom.",
                                        "questions": [
                                            {
                                                "id": "condition-assessment-q01",
                                                "text": "What identifies and describes the condition of a prosthesis, 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 prosthesis, 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 prosthesis 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 prosthesis 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 prosthesis is, and what that position is measured against.",
                                        "questions": [
                                            {
                                                "id": "position-and-frame-q01",
                                                "text": "What identifies and describes the location of a prosthesis, 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 prosthesis, 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 prosthesis 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 prosthesis 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 prosthesis, 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 prosthesis, 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 prosthesis 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 prosthesis 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 prosthesis between them.",
                                        "questions": [
                                            {
                                                "id": "stages-and-transitions-q01",
                                                "text": "What identifies and describes the lifecycle of a prosthesis, 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 prosthesis, 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 prosthesis 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 prosthesis, how often and by whom.",
                                "findings": [
                                    {
                                        "id": "observation-record",
                                        "name": "Observation record",
                                        "description": "How an observation of a prosthesis 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 prosthesis, 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 prosthesis, 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 prosthesis 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 prosthesis 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 prosthesis 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 prosthesis, 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 prosthesis 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 prosthesis 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 prosthesis 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 prosthesis 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 prosthesis 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 prosthesis, 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 prosthesis 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 prosthesis and how confident it is.",
                                        "questions": [
                                            {
                                                "id": "claim-provenance-q01",
                                                "text": "What identifies and describes a claim about a prosthesis, 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 prosthesis, 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 prosthesis 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 prosthesis is retired without being erased.",
                                        "questions": [
                                            {
                                                "id": "validity-and-supersession-q01",
                                                "text": "What identifies and describes the validity of a claim about a prosthesis, 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 prosthesis, 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 prosthesis 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
            }
        }
    }
}