{
    "model": {
        "rank": 5429,
        "code": "thing-q182221",
        "model_id": "vr.tr.fuse",
        "name": "fuse",
        "purpose": "Enable an agent to recognise an electrical fuse, assess its service state and suitability for a circuit, and determine what inspection or replacement is justified.",
        "family": "Thing Registry",
        "category": "Physical world and living systems",
        "status": "research-draft",
        "kind": "thing",
        "plane": "PHY",
        "domain": "PHY.OBJ",
        "industry": "",
        "version": "",
        "url": "/models/thing/q182221/",
        "tier": 2,
        "score": 67,
        "payload": {
            "layer": "wikidata",
            "aliases": [
                "automotive fuse",
                "NH fuse",
                "permanent power fuse",
                "thermal cutoff",
                "eFuse",
                "IEC 60269"
            ],
            "aliasCount": 6,
            "merged": 6,
            "knownIn": 67,
            "facets": null,
            "markers": [],
            "lexicalClass": "",
            "senseRank": null,
            "alsoRegisteredAs": "vr.tr.fuse",
            "source": {
                "dataset": "wikidata",
                "item": "Q182221",
                "url": "https://www.wikidata.org/wiki/Q182221",
                "license": "CC0 1.0"
            }
        },
        "research": {
            "vercy": "1.0-draft",
            "publication": {
                "status": "research-draft",
                "adjudicationStatus": "unreviewed",
                "publishableCanonical": false,
                "generatedAt": "2026-09-09T22:21:04Z",
                "providers": [
                    "Codex"
                ],
                "breadth": "recalled by Codex without web access - no source was read",
                "missingProviders": [],
                "pass": 2,
                "cost": {
                    "grok": {
                        "seconds": 25.9,
                        "error": "Reading additional input from stdin...\nOpenAI Codex v0.153.4\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: 01a08841-d771-73c0-a8a9-e9af181c5a90\n--------\nuser\nDescribe what is already known about one registered thing. Answer as JSON only, no prose around it.\n\nThing: fuse\nSense to describe: (none recorded)\nDomain code: PHY.OBJ\nAlso known as: (none)\n\n\nContext for this batch of 1001 things:\n# Batch 005: 1001 registered",
                        "usd": 0,
                        "recall": true
                    },
                    "codex": {
                        "seconds": 53.5,
                        "error": "Reading additional input from stdin...\nOpenAI Codex v0.153.4\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: 01a08841-d77e-7220-bf67-e851d0631833\n--------\nuser\nYou are drafting a Vercy meta-model for one registered thing. Answer as JSON only, no prose around it.\n\nThing: fuse\nRegistry id: vr.tr.fuse\nPlane / domain: PHY / PHY.OBJ\nRegistry definition: (none recorded)\nNames folded into this entry: (none)\n\n\nContext for th"
                    }
                }
            },
            "metaModel": {
                "id": "THING-Q182221",
                "registryId": "vr.tr.fuse",
                "name": "fuse",
                "version": "0.1.0-research.1",
                "entryKind": "thing",
                "family": "Thing Registry",
                "domain": [
                    "PHY.OBJ"
                ],
                "status": "research-draft"
            },
            "canonicalUrl": "https://ver.cy/models/thing/q182221/",
            "model": {
                "registry_id": "vr.tr.fuse",
                "name": "fuse",
                "purpose": "Enable an agent to recognise an electrical fuse, assess its service state and suitability for a circuit, and determine what inspection or replacement is justified.",
                "definition": "An electrical fuse is an overcurrent protective device whose fusible element melts when sufficient current flows for sufficient time, interrupting the circuit within its specified operating ratings.",
                "scope_statement": "This model owns the electrical overcurrent fuse as a device kind whose fusible element opens a circuit when its operating conditions are exceeded; product specifications and installed-unit observations supply evidence without becoming separate kinds.",
                "in_scope": [
                    "Fusible elements, enclosures, terminals and arc-control provisions",
                    "Current, voltage, breaking-capacity and operating-characteristic ratings",
                    "Compatibility with fuseholders and protected circuits",
                    "Intact, operated, degraded and uncertain service states",
                    "Inspection, replacement and evidence of conformity"
                ],
                "out_of_scope": [
                    "Explosive ignition fuses and fuzes",
                    "Dedicated temperature-triggered thermal cutoffs",
                    "Resettable polymeric overcurrent protectors and circuit breakers",
                    "Fuseholders, switches and disconnect assemblies as independent devices",
                    "Complete circuit protection design and the equipment being protected"
                ],
                "distinguishing_features": [
                    "An electrical overcurrent fuse interrupts its current path through operation of a fusible element; a circuit breaker uses a switching mechanism.",
                    "Its protective operation consumes the fusible element, so restoring service requires replacement of the element or fuse-link rather than a reset.",
                    "Its protection characteristic relates current magnitude to operating time; a dedicated thermal cutoff is primarily specified by its temperature-triggered operation.",
                    "Its voltage and breaking-capacity ratings constrain the faults it can interrupt; physical fit and current rating alone do not establish suitability.",
                    "This sense protects an electrical circuit and does not transmit ignition to an explosive charge."
                ],
                "characteristics": [
                    {
                        "name": "Fuse construction",
                        "kind": "category",
                        "unit_or_values": "Cartridge, blade, plug, bolted, rewireable or another documented construction",
                        "why_it_matters": "Identifies the physical interface and which part is replaced after operation."
                    },
                    {
                        "name": "Rated current",
                        "kind": "measurement",
                        "unit_or_values": "A, with stated reference conditions",
                        "why_it_matters": "Supports selection but does not describe an instantaneous trip threshold."
                    },
                    {
                        "name": "Rated voltage and current system",
                        "kind": "measurement",
                        "unit_or_values": "V, qualified separately for AC or DC and applicable conditions",
                        "why_it_matters": "Constrains the circuits in which interruption is supported."
                    },
                    {
                        "name": "Rated breaking capacity",
                        "kind": "measurement",
                        "unit_or_values": "A or kA, with voltage and test conditions",
                        "why_it_matters": "Allows comparison with the prospective fault current at the installation."
                    },
                    {
                        "name": "Time-current characteristic",
                        "kind": "relation",
                        "unit_or_values": "Current in A versus operating time in s, with tolerance bands and test conditions",
                        "why_it_matters": "Distinguishes acceptable transient loading from conditions expected to operate the fuse."
                    },
                    {
                        "name": "Let-through characteristic",
                        "kind": "relation",
                        "unit_or_values": "Peak current in A and pre-arcing or total-clearing I²t in A²·s, under specified fault conditions",
                        "why_it_matters": "Supports assessment of electrical and thermal stress on protected components."
                    },
                    {
                        "name": "Physical interface",
                        "kind": "measurement",
                        "unit_or_values": "Dimensions in mm, terminal geometry and documented holder designation",
                        "why_it_matters": "Establishes mounting compatibility without implying electrical equivalence."
                    },
                    {
                        "name": "Environmental operating limits",
                        "kind": "relation",
                        "unit_or_values": "Manufacturer limits and derating against temperature in °C and other declared conditions",
                        "why_it_matters": "Connects published ratings to the installed environment."
                    },
                    {
                        "name": "Service state",
                        "kind": "state",
                        "unit_or_values": "Unverified, intact, operated, damaged or suspect",
                        "why_it_matters": "Separates observed continuity from confidence that the fuse remains suitable for service."
                    },
                    {
                        "name": "Conformity evidence",
                        "kind": "relation",
                        "unit_or_values": "Applicable standard, issuing body, edition, product classification and verifiable certification record",
                        "why_it_matters": "Supports interpretation of markings and replacement compatibility."
                    }
                ],
                "affordances": [
                    "Classify a candidate as an electrical overcurrent fuse and identify its replaceable component.",
                    "Compare documented fuse ratings with circuit voltage, prospective fault current and load behaviour.",
                    "Interpret time-current and let-through data for a proposed protection role.",
                    "Record inspection and isolated-test evidence to assess service state.",
                    "Identify a documented compatible replacement and flag missing evidence.",
                    "Require investigation of the cause of operation before recommending restoration of service."
                ]
            },
            "sources": [],
            "structure": {
                "bundles": [
                    {
                        "id": "fuse-identity-and-construction",
                        "name": "Fuse identity and construction",
                        "description": "Establish the electrical sense, construction and boundary of the fuse being represented.",
                        "rationale": "The word fuse covers different devices, and replacement may concern a fuse-link rather than a complete assembly.",
                        "layers": [
                            {
                                "id": "device-sense-and-boundary",
                                "name": "Device sense and boundary",
                                "description": "Separate the overcurrent fuse from neighbouring protective and ignition devices.",
                                "findings": [
                                    {
                                        "id": "fusible-overcurrent-interruption",
                                        "name": "Fusible overcurrent interruption",
                                        "description": "Recognition requires evidence that a fusible element provides electrical overcurrent interruption.",
                                        "questions": [
                                            {
                                                "text": "Does this registry entry mean an electrical overcurrent fuse rather than an ignition fuse or temperature-triggered cutoff?",
                                                "kind": "boundary",
                                                "id": "fusible-overcurrent-interruption-q01"
                                            },
                                            {
                                                "text": "What documented operating principle identifies the device as a fusible overcurrent protector?",
                                                "kind": "definition",
                                                "id": "fusible-overcurrent-interruption-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "replaceable-element-and-interface",
                                "name": "Replaceable element and interface",
                                "description": "Identify the consumable portion and its mechanical connection to the circuit.",
                                "findings": [
                                    {
                                        "id": "fuse-link-and-holder-boundary",
                                        "name": "Fuse-link and holder boundary",
                                        "description": "The model distinguishes the part consumed by operation from the holder and any associated switching assembly.",
                                        "questions": [
                                            {
                                                "text": "Is the replaceable portion a sealed fuse-link, a cartridge, or a manufacturer-specified rewireable element?",
                                                "kind": "definition",
                                                "id": "fuse-link-and-holder-boundary-q01"
                                            },
                                            {
                                                "text": "Which dimensions, terminal features and holder designations establish physical compatibility?",
                                                "kind": "measurement",
                                                "id": "fuse-link-and-holder-boundary-q02"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "operating-and-interruption-envelope",
                        "name": "Operating and interruption envelope",
                        "description": "Describe when the fuse carries current, operates and safely interrupts a fault.",
                        "rationale": "A fuse cannot be assessed from its ampere rating alone.",
                        "layers": [
                            {
                                "id": "load-current-and-operating-time",
                                "name": "Load current and operating time",
                                "description": "Relate continuous loading and transients to the documented operating characteristic.",
                                "findings": [
                                    {
                                        "id": "time-current-evidence",
                                        "name": "Time-current evidence",
                                        "description": "Selection needs the applicable time-current data and its reference conditions, rather than an assumed fixed trip current.",
                                        "questions": [
                                            {
                                                "text": "What rated current and time-current tolerance bands does the manufacturer publish for this fuse?",
                                                "kind": "measurement",
                                                "id": "time-current-evidence-q01"
                                            },
                                            {
                                                "text": "How do ambient temperature, enclosure conditions and repeated load pulses affect the permitted loading?",
                                                "kind": "measurement",
                                                "id": "time-current-evidence-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "fault-interruption-limits",
                                "name": "Fault interruption limits",
                                "description": "Establish the electrical conditions under which fault interruption is supported.",
                                "findings": [
                                    {
                                        "id": "voltage-and-breaking-capacity",
                                        "name": "Voltage and breaking capacity",
                                        "description": "Breaking capacity must be interpreted with voltage, AC or DC qualification and any restriction on the interruptible current range.",
                                        "questions": [
                                            {
                                                "text": "What voltage and breaking-capacity ratings apply to the intended AC or DC circuit?",
                                                "kind": "measurement",
                                                "id": "voltage-and-breaking-capacity-q01"
                                            },
                                            {
                                                "text": "Does the fuse cover the required overcurrent range, or does its classification require complementary protection?",
                                                "kind": "boundary",
                                                "id": "voltage-and-breaking-capacity-q02"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "circuit-fit-and-protection",
                        "name": "Circuit fit and protection",
                        "description": "Connect fuse characteristics to the protected circuit and other protective devices.",
                        "rationale": "A physically interchangeable fuse may provide unsuitable protection or fail to coordinate with neighbouring devices.",
                        "layers": [
                            {
                                "id": "protected-load-compatibility",
                                "name": "Protected load compatibility",
                                "description": "Assess whether the fuse supports the intended load and fault conditions.",
                                "findings": [
                                    {
                                        "id": "load-and-fault-match",
                                        "name": "Load and fault match",
                                        "description": "Suitability depends on normal current, inrush, prospective fault current and the damage limits of protected components.",
                                        "questions": [
                                            {
                                                "text": "What normal-load and inrush profiles must the fuse carry without unwanted operation?",
                                                "kind": "measurement",
                                                "id": "load-and-fault-match-q01"
                                            },
                                            {
                                                "text": "What circuit fault-current and component-withstand evidence supports use of this fuse?",
                                                "kind": "provenance",
                                                "id": "load-and-fault-match-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "coordination-and-let-through",
                                "name": "Coordination and let-through",
                                "description": "Capture evidence about fault energy and interaction with upstream or downstream protection.",
                                "findings": [
                                    {
                                        "id": "conditional-coordination-evidence",
                                        "name": "Conditional coordination evidence",
                                        "description": "Current limitation and selective operation require evidence for the particular devices and fault conditions.",
                                        "questions": [
                                            {
                                                "text": "What peak let-through current and pre-arcing or total-clearing I²t data apply to the expected faults?",
                                                "kind": "measurement",
                                                "id": "conditional-coordination-evidence-q01"
                                            },
                                            {
                                                "text": "Which manufacturer tables or engineering studies support coordination with the other protective devices?",
                                                "kind": "provenance",
                                                "id": "conditional-coordination-evidence-q02"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "service-state-and-replacement",
                        "name": "Service state and replacement",
                        "description": "Assess condition and establish an evidence-based route to replacement and restoration.",
                        "rationale": "An operated fuse is evidence of an event, while an apparently intact fuse can still be damaged, unsuitable or incorrectly identified.",
                        "layers": [
                            {
                                "id": "condition-and-operation-evidence",
                                "name": "Condition and operation evidence",
                                "description": "Distinguish protective operation from mechanical damage, connection heating and uncertain condition.",
                                "findings": [
                                    {
                                        "id": "observed-state-confidence",
                                        "name": "Observed state confidence",
                                        "description": "State assessment records the method and limits of visual, indicator and isolated electrical evidence.",
                                        "questions": [
                                            {
                                                "text": "What inspection or isolated-test evidence supports the assigned intact, operated, damaged or suspect state?",
                                                "kind": "provenance",
                                                "id": "observed-state-confidence-q01"
                                            },
                                            {
                                                "text": "Are there signs of terminal overheating, corrosion, enclosure damage or an unreliable operation indicator?",
                                                "kind": "measurement",
                                                "id": "observed-state-confidence-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "replacement-and-restoration",
                                "name": "Replacement and restoration",
                                "description": "Determine replacement equivalence and prerequisites for returning the circuit to service.",
                                "findings": [
                                    {
                                        "id": "documented-replacement-eligibility",
                                        "name": "Documented replacement eligibility",
                                        "description": "A replacement decision considers electrical characteristics, physical fit, conformity evidence and the cause of the previous operation.",
                                        "questions": [
                                            {
                                                "text": "Which manufacturer documentation and applicable standards establish that the proposed replacement is suitable?",
                                                "kind": "provenance",
                                                "id": "documented-replacement-eligibility-q01"
                                            },
                                            {
                                                "text": "What fault investigation, isolation and equipment-specific checks are required before replacement and re-energisation?",
                                                "kind": "action",
                                                "id": "documented-replacement-eligibility-q02"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "evidence-and-external-alignment",
                        "name": "Evidence and external alignment",
                        "description": "What the world already says about this thing, gathered so the model can be checked against it.",
                        "rationale": "A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.",
                        "layers": [
                            {
                                "id": "reported-evidence",
                                "name": "Reported evidence",
                                "description": "Findings from the breadth pass, kept separate from the structural claims.",
                                "findings": [
                                    {
                                        "id": "evidence-confidence-notes",
                                        "name": "Check these first",
                                        "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                                        "evidence": [
                                            "The electrical overcurrent-protection sense is assumed; the registry provides no sense, and 'fuse' also names a pyrotechnic ignition device.",
                                            "Standards and markings are recalled without source consultation; applicable editions, parts and certification requirements need verification.",
                                            "Measurement examples describe common product families, not universal limits; selection also requires time-current curves, breaking capacity and circuit-specific coordination."
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-confidence-notes-q01",
                                                "text": "Which of these check these first hold for the sense of fuse this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-kinds",
                                        "name": "Kinds and varieties",
                                        "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                                        "evidence": [
                                            "Cartridge fuse",
                                            "Automotive blade fuse",
                                            "High-rupturing-capacity fuse",
                                            "Rewirable fuse",
                                            "Surface-mount fuse",
                                            "Expulsion fuse"
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-kinds-q01",
                                                "text": "Which of these kinds and varieties hold for the sense of fuse this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-identifiers",
                                        "name": "Identifiers and schemes",
                                        "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                                        "evidence": [
                                            {
                                                "scheme": "IEC 60269 utilization category",
                                                "value_or_pattern": "gG, aM",
                                                "note": "Examples distinguish full-range general-purpose protection from partial-range motor-circuit protection; these are application categories, not unique product identifiers."
                                            },
                                            {
                                                "scheme": "IEC 60127 time-current characteristic marking",
                                                "value_or_pattern": "F, T",
                                                "note": "Common miniature-fuse markings for quick-acting and time-lag characteristics, respectively."
                                            }
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-identifiers-q01",
                                                "text": "Which of these identifiers and schemes hold for the sense of fuse this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-standards-and-regulation",
                                        "name": "Standards and regulation",
                                        "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                                        "evidence": [
                                            "IEC 60269 series - Low-voltage fuses, issued by the International Electrotechnical Commission.",
                                            "IEC 60127 series - Miniature fuses, issued by the International Electrotechnical Commission.",
                                            "UL 248 series - Low-Voltage Fuses, issued by UL Standards & Engagement.",
                                            "ISO 8820 series - Road vehicles - Fuse-links, issued by the International Organization for Standardization."
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-standards-and-regulation-q01",
                                                "text": "Which of these standards and regulation hold for the sense of fuse this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-real-world-use",
                                        "name": "Real-world use",
                                        "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                                        "evidence": [
                                            "Protecting building and industrial circuit conductors against overcurrent.",
                                            "Protecting vehicle wiring and electrical accessories.",
                                            "Providing overcurrent protection inside electronic equipment.",
                                            "Protecting power semiconductor circuits with appropriately selected high-speed fuses.",
                                            "Protecting distribution transformers and feeders with suitable high-voltage fuse systems."
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-real-world-use-q01",
                                                "text": "Which of these real-world use hold for the sense of fuse this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-measurements",
                                        "name": "Typical measurements",
                                        "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                                        "evidence": [
                                            {
                                                "quantity": "Rated current of common miniature equipment fuses",
                                                "typical_range": "Approximately 0.05-10",
                                                "unit": "A"
                                            },
                                            {
                                                "quantity": "Rated current of common automotive blade fuses",
                                                "typical_range": "Approximately 1-40; larger formats extend above this range",
                                                "unit": "A"
                                            },
                                            {
                                                "quantity": "Common cylindrical miniature fuse dimensions, diameter × length",
                                                "typical_range": "5 × 20 or approximately 6.3 × 32",
                                                "unit": "mm"
                                            },
                                            {
                                                "quantity": "Rated voltage of common miniature cartridge fuses",
                                                "typical_range": "Common examples include 125 and 250; AC and DC ratings must be distinguished",
                                                "unit": "V"
                                            }
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-measurements-q01",
                                                "text": "Which of these typical measurements hold for the sense of fuse this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-failure-modes-and-hazards",
                                        "name": "Failure modes and hazards",
                                        "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                                        "evidence": [
                                            "Normal inrush or repeated current cycling can cause unwanted operation when the fuse characteristic is unsuitable.",
                                            "An oversized or bypassed fuse can leave wiring and equipment inadequately protected.",
                                            "Fault current exceeding the breaking capacity can cause rupture, sustained arcing or fire.",
                                            "Using a fuse beyond its voltage rating, or without an appropriate DC rating, can prevent safe interruption.",
                                            "Loose, corroded or damaged fuse-holder contacts can overheat even without enough current to operate the fuse."
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-failure-modes-and-hazards-q01",
                                                "text": "Which of these failure modes and hazards hold for the sense of fuse this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-regional-variation",
                                        "name": "Regional variation",
                                        "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                                        "evidence": [
                                            "North American installations commonly use UL fuse classes, while many other markets use IEC utilization categories and fuse systems.",
                                            "UK BS 1363 plugs incorporate a replaceable fuse conforming to BS 1362; many other household plug systems do not incorporate a fuse.",
                                            "Fuse dimensions, holders and certification requirements vary between markets; equal current ratings do not establish interchangeability."
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-regional-variation-q01",
                                                "text": "Which of these regional variation hold for the sense of fuse this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-neighbours",
                                        "name": "Neighbouring kinds and how to tell them apart",
                                        "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                                        "evidence": [
                                            {
                                                "name": "Circuit breaker",
                                                "difference": "A circuit breaker opens contacts through a trip mechanism and is generally resettable; a conventional fuse operates by melting an element that must be replaced."
                                            },
                                            {
                                                "name": "Thermal cutoff",
                                                "difference": "A thermal cutoff responds primarily to its temperature, whereas an electrical overcurrent fuse is characterized by its response to current over time."
                                            },
                                            {
                                                "name": "Resettable polymeric PTC device",
                                                "difference": "A polymeric PTC device limits current by increasing resistance and can recover after cooling; a conventional fuse melts its element to interrupt the circuit."
                                            },
                                            {
                                                "name": "Fuse holder",
                                                "difference": "The holder supports and electrically connects the replaceable fuse-link; it is not the sacrificial interrupting element."
                                            },
                                            {
                                                "name": "Pyrotechnic fuse",
                                                "difference": "A pyrotechnic fuse transmits ignition through a combustible train rather than interrupting an electrical circuit."
                                            }
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-neighbours-q01",
                                                "text": "Which of these neighbouring kinds and how to tell them apart hold for the sense of fuse this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    }
                ]
            },
            "openQuestions": [
                "Does the registry intend the electrical overcurrent sense of fuse, and does an existing world model already own that concept?",
                "Should thermal cutoffs, rewireable fuses or externally triggered fuse devices be included here or linked to separate registered kinds?",
                "Which standards, issuing bodies, editions and certification schemes apply across the intended installation domains and jurisdictions?",
                "Which representative manufacturer sources establish construction-specific rating ranges, dimensions, derating rules and failure modes?",
                "What minimum evidence is required to approve replacement equivalence when original markings or circuit fault-current data are unavailable?"
            ],
            "statistics": {
                "bundles": 5,
                "layers": 9,
                "findings": 17,
                "questions": 25
            }
        },
        "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 fuse, record what state it is in, and decide what may be done with it.",
            "whatItIs": "Enable an agent to recognise an electrical fuse, assess its service state and suitability for a circuit, and determine what inspection or replacement is justified.",
            "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: automotive fuse, NH fuse, permanent power fuse, thermal cutoff, eFuse, IEC 60269.",
                "6 finer distinctions are held as aliases rather than separate entries, because telling them apart needs a task that asks for it.",
                "Described in 67 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 fuse, 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": [
                        "automotive fuse",
                        "NH fuse",
                        "permanent power fuse",
                        "thermal cutoff",
                        "eFuse",
                        "IEC 60269"
                    ]
                }
            ],
            "standing": "Described in 67 Wikipedia languages, which measures how widely it is written about rather than how important or how common it is. 6 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 fuse from another, and a fuse 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 fuse, 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 fuse, 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 fuse 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 fuse, 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 fuse, 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 fuse 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 fuse 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 fuse, 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 fuse, 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 fuse 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 fuse from the things most often confused with it.",
                                        "questions": [
                                            {
                                                "id": "distinguishing-features-q01",
                                                "text": "What identifies and describes what distinguishes a fuse, 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 fuse, 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 fuse 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 fuse 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 fuse, 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 fuse, 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 fuse 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 fuse is built from and which parts are replaceable.",
                                        "questions": [
                                            {
                                                "id": "parts-and-materials-q01",
                                                "text": "What identifies and describes the composition of a fuse, 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 fuse, 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 fuse 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 fuse is judged and by whom.",
                                        "questions": [
                                            {
                                                "id": "condition-assessment-q01",
                                                "text": "What identifies and describes the condition of a fuse, 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 fuse, 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 fuse 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 fuse 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 fuse is, and what that position is measured against.",
                                        "questions": [
                                            {
                                                "id": "position-and-frame-q01",
                                                "text": "What identifies and describes the location of a fuse, 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 fuse, 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 fuse 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 fuse 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 fuse, 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 fuse, 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 fuse 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 fuse 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 fuse between them.",
                                        "questions": [
                                            {
                                                "id": "stages-and-transitions-q01",
                                                "text": "What identifies and describes the lifecycle of a fuse, 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 fuse, 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 fuse 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 fuse, how often and by whom.",
                                "findings": [
                                    {
                                        "id": "observation-record",
                                        "name": "Observation record",
                                        "description": "How an observation of a fuse 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 fuse, 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 fuse, 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 fuse 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 fuse 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 fuse 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 fuse, 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 fuse 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 fuse 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 fuse 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 fuse 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 fuse 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 fuse, 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 fuse 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 fuse and how confident it is.",
                                        "questions": [
                                            {
                                                "id": "claim-provenance-q01",
                                                "text": "What identifies and describes a claim about a fuse, 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 fuse, 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 fuse 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 fuse is retired without being erased.",
                                        "questions": [
                                            {
                                                "id": "validity-and-supersession-q01",
                                                "text": "What identifies and describes the validity of a claim about a fuse, 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 fuse, 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 fuse 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
            }
        }
    }
}