{
    "model": {
        "rank": 5699,
        "code": "thing-q190672",
        "model_id": "vr.tr.fire-extinguisher",
        "name": "fire extinguisher",
        "purpose": "Enable an AI agent to recognise a fire extinguisher, assess its documented suitability and readiness, and identify permitted handling, inspection or service actions without treating uncertain equipment as safe to use.",
        "family": "Thing Registry",
        "category": "Physical world and living systems",
        "status": "research-draft",
        "kind": "thing",
        "plane": "PHY",
        "domain": "PHY.OBJ",
        "industry": "",
        "version": "",
        "url": "/models/thing/q190672/",
        "tier": 2,
        "score": 65,
        "payload": {
            "layer": "wikidata",
            "aliases": [
                "ryūdosui",
                "fire flapper",
                "carbon dioxide fire extinguisher",
                "fire blanket",
                "incipient stage fire extinguishing equipment",
                "fire grenade",
                "sonic fire extinguisher"
            ],
            "aliasCount": 7,
            "merged": 7,
            "knownIn": 65,
            "facets": null,
            "markers": [],
            "lexicalClass": "",
            "senseRank": null,
            "alsoRegisteredAs": null,
            "source": {
                "dataset": "wikidata",
                "item": "Q190672",
                "url": "https://www.wikidata.org/wiki/Q190672",
                "license": "CC0 1.0"
            }
        },
        "research": {
            "vercy": "1.0-draft",
            "publication": {
                "status": "research-draft",
                "adjudicationStatus": "unreviewed",
                "publishableCanonical": false,
                "generatedAt": "2026-09-07T09:03:19Z",
                "providers": [
                    "Codex"
                ],
                "missingProviders": [
                    "Grok"
                ],
                "pass": 2,
                "cost": {
                    "grok": {
                        "usd": null,
                        "turns": null,
                        "seconds": 13.9,
                        "error": "Error: Internal error: {\n  \"message\": \"API error (status 402 Payment Required): Grok Build usage balance exhausted\",\n  \"http_status\": 402\n}",
                        "retried": true
                    },
                    "codex": {
                        "seconds": 85.5,
                        "error": "Reading additional input from stdin...\nOpenAI Codex v0.153.3\n--------\nworkdir: R:\\02_PROJECTS\\02_Meta_Models_Platforms\\Ver.cy\\current\\thing-registry-backlog\nmodel: gpt-6-astra\nprovider: openai\napproval: never\nsandbox: read-only\nreasoning effort: none\nreasoning summaries: none\nsession id: 01a07b1a-45c9-7231-ac01-75f994ff3762\n--------\nuser\nYou are drafting a Vercy meta-model for one registered thing. Answer as JSON only, no prose around it.\n\nThing: fire extinguisher\nRegistry id: vr.tr.fire-extinguisher\nPlane / domain: PHY / PHY.OBJ\nRegistry definition: (none recorded)\nNames folded into this entr"
                    }
                }
            },
            "metaModel": {
                "id": "THING-Q190672",
                "registryId": "vr.tr.fire-extinguisher",
                "name": "fire extinguisher",
                "version": "0.1.0-research.1",
                "entryKind": "thing",
                "family": "Thing Registry",
                "domain": [
                    "PHY.OBJ"
                ],
                "status": "research-draft"
            },
            "canonicalUrl": "https://ver.cy/models/thing/q190672/",
            "model": {
                "registry_id": "vr.tr.fire-extinguisher",
                "name": "fire extinguisher",
                "purpose": "Enable an AI agent to recognise a fire extinguisher, assess its documented suitability and readiness, and identify permitted handling, inspection or service actions without treating uncertain equipment as safe to use.",
                "definition": "",
                "scope_statement": "This model owns the identity, extinguishing capability, physical condition, readiness, placement and service constraints of an individual fire extinguisher, distinguishing observed evidence from documented ratings and unresolved assessments.",
                "in_scope": [
                    "Identification of the extinguisher and its labelled agent, capacity and ratings",
                    "Discharge mechanism, controls and safety devices",
                    "Physical condition, charge evidence and readiness assessment",
                    "Placement, accessibility and mounting",
                    "Inspection, service history and restrictions on use or return to service"
                ],
                "out_of_scope": [
                    "Fire detection, alarm and building evacuation systems",
                    "Fixed fire suppression installations and their distribution networks",
                    "Building fire risk assessments and extinguisher coverage planning",
                    "Responder competence, training and personal protective equipment",
                    "Fire incident command, firefighting tactics and evacuation decisions"
                ],
                "distinguishing_features": [
                    "The device is identified by its markings or supporting documentation as a fire extinguisher; a pressurised cylinder alone is insufficient evidence.",
                    "It carries an extinguishing medium and an integrated discharge arrangement, distinguishing it from a fire blanket or an empty storage container.",
                    "Its intended operation is as a discrete portable or wheeled unit, distinguishing it from a fixed suppression system nozzle or supply cylinder.",
                    "Its documented purpose is fire suppression, distinguishing it from a similar-looking garden sprayer, compressed-gas cylinder or cleaning applicator.",
                    "An empty or condemned extinguisher retains its equipment identity while its readiness changes; appearance alone does not establish serviceability."
                ],
                "characteristics": [
                    {
                        "name": "Equipment identity",
                        "kind": "category",
                        "unit_or_values": "Manufacturer, model and serial or asset identifier; unknown where unverified",
                        "why_it_matters": "Connects the physical unit to the correct instructions, ratings and service records."
                    },
                    {
                        "name": "Mobility form",
                        "kind": "category",
                        "unit_or_values": "Hand-portable, wheeled, other documented form, unresolved",
                        "why_it_matters": "Determines handling assumptions and helps establish the boundary with fixed equipment."
                    },
                    {
                        "name": "Extinguishing medium",
                        "kind": "category",
                        "unit_or_values": "Exact label or manufacturer designation; unknown",
                        "why_it_matters": "Supports interpretation of documented fire suitability and restrictions."
                    },
                    {
                        "name": "Nominal agent charge",
                        "kind": "measurement",
                        "unit_or_values": "Labelled mass in kg or volume in L, preserving the original unit",
                        "why_it_matters": "Records intended contents without confusing agent charge with total equipment mass."
                    },
                    {
                        "name": "Fire performance rating",
                        "kind": "category",
                        "unit_or_values": "Exact rating notation with issuing standard, jurisdiction and edition where known",
                        "why_it_matters": "Prevents ratings from different classification systems being treated as equivalent."
                    },
                    {
                        "name": "Expulsion mechanism",
                        "kind": "category",
                        "unit_or_values": "Manufacturer-described mechanism, such as stored pressure or cartridge operation; unknown",
                        "why_it_matters": "Determines which condition indicators and service instructions apply."
                    },
                    {
                        "name": "Charge evidence",
                        "kind": "state",
                        "unit_or_values": "Recorded indicator reading or approved measurement, method, date and interpretation; unavailable or inconclusive",
                        "why_it_matters": "Separates evidence of charge from an unsupported declaration of readiness."
                    },
                    {
                        "name": "Physical integrity",
                        "kind": "state",
                        "unit_or_values": "Observed condition of vessel, valve, discharge path and safety devices; defects or unknowns recorded separately",
                        "why_it_matters": "Exposes defects that may restrict handling or use even when charge appears acceptable."
                    },
                    {
                        "name": "Deployment location",
                        "kind": "relation",
                        "unit_or_values": "Link to installed location, mounting arrangement and assigned coverage assessment",
                        "why_it_matters": "Connects the unit to accessibility observations and externally determined placement requirements."
                    },
                    {
                        "name": "Service eligibility",
                        "kind": "category",
                        "unit_or_values": "Rechargeable, non-rechargeable or unresolved, according to applicable documentation",
                        "why_it_matters": "Constrains what may happen after discharge or a failed assessment."
                    },
                    {
                        "name": "Readiness disposition",
                        "kind": "state",
                        "unit_or_values": "Unassessed, assessed ready, restricted, out of service or retired; with basis, assessor and assessment date",
                        "why_it_matters": "Provides a traceable decision rather than inferring readiness from one indicator."
                    }
                ],
                "affordances": [
                    "Identify the unit and retrieve its applicable operating and service documentation.",
                    "Compare documented ratings and restrictions with an externally supplied hazard assessment.",
                    "Record non-invasive inspection observations and flag missing or conflicting readiness evidence.",
                    "Locate the unit and assess whether its mounting, visibility or access needs attention.",
                    "Determine whether use, movement or service is permitted under documented conditions and actor competence.",
                    "Initiate authorised service, replacement or retirement workflows and record the resulting disposition."
                ]
            },
            "sources": [],
            "structure": {
                "bundles": [
                    {
                        "id": "identity-and-rating",
                        "name": "Identity and rating",
                        "description": "Establishes which extinguisher is present and how its declared capabilities must be interpreted.",
                        "rationale": "Similar-looking extinguishers can have different contents, ratings and instructions.",
                        "layers": [
                            {
                                "id": "unit-identification",
                                "name": "Unit identification",
                                "description": "Connects physical markings to a specific equipment model and individual unit.",
                                "findings": [
                                    {
                                        "id": "traceable-extinguisher-identity",
                                        "name": "Traceable extinguisher identity",
                                        "description": "Record the evidence identifying the unit as an extinguisher and linking it to manufacturer documentation.",
                                        "questions": [
                                            {
                                                "text": "Which markings establish the manufacturer, model and individual unit identifier?",
                                                "kind": "definition",
                                                "id": "traceable-extinguisher-identity-q01"
                                            },
                                            {
                                                "text": "Which documentation matches this unit, and are any markings missing, illegible or inconsistent?",
                                                "kind": "provenance",
                                                "id": "traceable-extinguisher-identity-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "rating-interpretation",
                                "name": "Rating interpretation",
                                "description": "Preserves the meaning and authority of capability markings.",
                                "findings": [
                                    {
                                        "id": "declared-fire-capability",
                                        "name": "Declared fire capability",
                                        "description": "Record exact fire ratings and their classification context without translating them into unsupported equivalences.",
                                        "questions": [
                                            {
                                                "text": "What exact fire class and performance markings appear on the unit?",
                                                "kind": "definition",
                                                "id": "declared-fire-capability-q01"
                                            },
                                            {
                                                "text": "Which standard or certification system defines those markings, and what evidence establishes its applicability?",
                                                "kind": "provenance",
                                                "id": "declared-fire-capability-q02"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "agent-and-hazard-compatibility",
                        "name": "Agent and hazard compatibility",
                        "description": "Describes the contents and the documented limits on where they may be applied.",
                        "rationale": "An extinguisher's suitability depends on its specific medium and documented restrictions, not just its presence.",
                        "layers": [
                            {
                                "id": "agent-charge",
                                "name": "Agent charge",
                                "description": "Identifies the specified extinguishing medium and nominal quantity.",
                                "findings": [
                                    {
                                        "id": "specified-extinguishing-contents",
                                        "name": "Specified extinguishing contents",
                                        "description": "Separate the declared contents from evidence about what is currently inside the unit.",
                                        "questions": [
                                            {
                                                "text": "What medium designation and nominal charge quantity are specified for this model?",
                                                "kind": "definition",
                                                "id": "specified-extinguishing-contents-q01"
                                            },
                                            {
                                                "text": "What label, manufacturing or service evidence supports the identity of the current contents?",
                                                "kind": "provenance",
                                                "id": "specified-extinguishing-contents-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "application-restrictions",
                                "name": "Application restrictions",
                                "description": "Connects documented capability to the hazards and environmental constraints supplied by neighbouring models.",
                                "findings": [
                                    {
                                        "id": "documented-suitability-boundaries",
                                        "name": "Documented suitability boundaries",
                                        "description": "Record supported applications, exclusions and unresolved compatibility questions.",
                                        "questions": [
                                            {
                                                "text": "What restrictions do the applicable instructions state for electrical equipment, materials, occupied spaces or environmental conditions?",
                                                "kind": "boundary",
                                                "id": "documented-suitability-boundaries-q01"
                                            },
                                            {
                                                "text": "Does the supplied hazard assessment fall within the documented capability, or is further assessment required?",
                                                "kind": "boundary",
                                                "id": "documented-suitability-boundaries-q02"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "discharge-and-readiness",
                        "name": "Discharge and readiness",
                        "description": "Captures the condition of the discharge assembly and evidence supporting operational readiness.",
                        "rationale": "Charge indication, mechanical integrity and discharge history must be considered together.",
                        "layers": [
                            {
                                "id": "discharge-assembly",
                                "name": "Discharge assembly",
                                "description": "Identifies the model-specific controls, safeguards and discharge path.",
                                "findings": [
                                    {
                                        "id": "discharge-path-condition",
                                        "name": "Discharge path condition",
                                        "description": "Record the presence and observed condition of required controls, safety devices, hose, horn or nozzle as applicable.",
                                        "questions": [
                                            {
                                                "text": "Which controls, safety devices and discharge components are required by this model's documentation?",
                                                "kind": "definition",
                                                "id": "discharge-path-condition-q01"
                                            },
                                            {
                                                "text": "What visible damage, obstruction, missing component or evidence of tampering affects those parts?",
                                                "kind": "measurement",
                                                "id": "discharge-path-condition-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "readiness-evidence",
                                "name": "Readiness evidence",
                                "description": "Combines applicable charge checks, integrity observations and use history into a qualified assessment.",
                                "findings": [
                                    {
                                        "id": "supported-readiness-assessment",
                                        "name": "Supported readiness assessment",
                                        "description": "Record the assessment basis and unresolved evidence without assuming every extinguisher has a pressure gauge.",
                                        "questions": [
                                            {
                                                "text": "Which charge assessment method applies to this model, and what dated reading or result is available?",
                                                "kind": "measurement",
                                                "id": "supported-readiness-assessment-q01"
                                            },
                                            {
                                                "text": "What discharge history, leakage, vessel damage or other unresolved condition affects the assessment?",
                                                "kind": "measurement",
                                                "id": "supported-readiness-assessment-q02"
                                            },
                                            {
                                                "text": "Who may assign its readiness disposition, and what evidence supports that decision?",
                                                "kind": "action",
                                                "id": "supported-readiness-assessment-q03"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "placement-and-access",
                        "name": "Placement and access",
                        "description": "Records where the extinguisher is deployed and whether it can be found and retrieved as intended.",
                        "rationale": "A serviceable extinguisher may still be unavailable because of obstruction, unsuitable mounting or exposure.",
                        "layers": [
                            {
                                "id": "deployment-position",
                                "name": "Deployment position",
                                "description": "Links the physical unit to its location and assigned role in an external coverage plan.",
                                "findings": [
                                    {
                                        "id": "assigned-extinguisher-location",
                                        "name": "Assigned extinguisher location",
                                        "description": "Distinguish the observed location from the location required by the responsible assessment.",
                                        "questions": [
                                            {
                                                "text": "Where is the unit currently located, and when was that location verified?",
                                                "kind": "measurement",
                                                "id": "assigned-extinguisher-location-q01"
                                            },
                                            {
                                                "text": "Which coverage assessment or placement instruction assigns this unit to that location?",
                                                "kind": "provenance",
                                                "id": "assigned-extinguisher-location-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "retrieval-and-exposure",
                                "name": "Retrieval and exposure",
                                "description": "Captures obstacles to retrieval and conditions affecting the installed unit.",
                                "findings": [
                                    {
                                        "id": "accessible-protected-installation",
                                        "name": "Accessible and protected installation",
                                        "description": "Record visibility, access, mounting condition and environmental exposure against applicable requirements.",
                                        "questions": [
                                            {
                                                "text": "What obstructions, enclosure conditions or mounting defects affect finding and retrieving the unit?",
                                                "kind": "measurement",
                                                "id": "accessible-protected-installation-q01"
                                            },
                                            {
                                                "text": "Are the observed temperature and exposure conditions within the documented installation limits?",
                                                "kind": "boundary",
                                                "id": "accessible-protected-installation-q02"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "service-and-disposition",
                        "name": "Service and disposition",
                        "description": "Tracks applicable maintenance obligations and the authority for changing service status.",
                        "rationale": "Inspection, recharge, testing and retirement depend on the particular equipment and governing requirements.",
                        "layers": [
                            {
                                "id": "maintenance-basis",
                                "name": "Maintenance basis",
                                "description": "Connects completed and pending service activities to their applicable requirements.",
                                "findings": [
                                    {
                                        "id": "traceable-service-obligations",
                                        "name": "Traceable service obligations",
                                        "description": "Record service evidence and due activities without assuming universal maintenance intervals.",
                                        "questions": [
                                            {
                                                "text": "Which manufacturer instructions and jurisdictional requirements establish the applicable inspection, maintenance and testing activities?",
                                                "kind": "provenance",
                                                "id": "traceable-service-obligations-q01"
                                            },
                                            {
                                                "text": "What records establish completed work, its outcome and the basis for the next required activity?",
                                                "kind": "provenance",
                                                "id": "traceable-service-obligations-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "permitted-status-transitions",
                                "name": "Permitted status transitions",
                                "description": "Controls decisions following discharge, defects, failed checks or end-of-service determinations.",
                                "findings": [
                                    {
                                        "id": "authorised-service-disposition",
                                        "name": "Authorised service disposition",
                                        "description": "Record whether the unit may remain available, requires service or replacement, or has been retired.",
                                        "questions": [
                                            {
                                                "text": "Given the unit's condition and documented service eligibility, which next actions are permitted and who is qualified to perform them?",
                                                "kind": "action",
                                                "id": "authorised-service-disposition-q01"
                                            },
                                            {
                                                "text": "What evidence and authorisation are required before this individual unit can return to service?",
                                                "kind": "action",
                                                "id": "authorised-service-disposition-q02"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    }
                ]
            },
            "openQuestions": [
                "Does the registry intend this entry to include wheeled extinguishers, aerosol extinguishing devices and specialist portable units, or do existing neighbouring entries own some of these forms?",
                "Which existing Vercy world model, if any, already owns this concept and should remain its single source of truth?",
                "Which jurisdictions and rating systems must be supported, and how should their non-equivalent markings be represented?",
                "Which manufacturer-specific methods and acceptance criteria establish charge and readiness for each supported extinguisher type?",
                "Which actors may assess readiness, perform service and authorise return to service under the applicable operating context?"
            ],
            "statistics": {
                "bundles": 5,
                "layers": 10,
                "findings": 10,
                "questions": 21
            }
        },
        "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 fire extinguisher, record what state it is in, and decide what may be done with it.",
            "whatItIs": "Enable an AI agent to recognise a fire extinguisher, assess its documented suitability and readiness, and identify permitted handling, inspection or service actions without treating uncertain equipment as safe to use.",
            "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: ryūdosui, fire flapper, carbon dioxide fire extinguisher, fire blanket, incipient stage fire extinguishing equipment, fire grenade, sonic fire extinguisher.",
                "7 finer distinctions are held as aliases rather than separate entries, because telling them apart needs a task that asks for it.",
                "Described in 65 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 fire extinguisher, 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": [
                        "ryūdosui",
                        "fire flapper",
                        "carbon dioxide fire extinguisher",
                        "fire blanket",
                        "incipient stage fire extinguishing equipment",
                        "fire grenade",
                        "sonic fire extinguisher"
                    ]
                }
            ],
            "standing": "Described in 65 Wikipedia languages, which measures how widely it is written about rather than how important or how common it is. 7 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 fire extinguisher from another, and a fire extinguisher 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 fire extinguisher, 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 fire extinguisher, 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 fire extinguisher 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 fire extinguisher, 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 fire extinguisher, 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 fire extinguisher 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 fire extinguisher 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 fire extinguisher, 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 fire extinguisher, 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 fire extinguisher 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 fire extinguisher from the things most often confused with it.",
                                        "questions": [
                                            {
                                                "id": "distinguishing-features-q01",
                                                "text": "What identifies and describes what distinguishes a fire extinguisher, 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 fire extinguisher, 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 fire extinguisher 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 fire extinguisher 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 fire extinguisher, 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 fire extinguisher, 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 fire extinguisher 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 fire extinguisher is built from and which parts are replaceable.",
                                        "questions": [
                                            {
                                                "id": "parts-and-materials-q01",
                                                "text": "What identifies and describes the composition of a fire extinguisher, 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 fire extinguisher, 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 fire extinguisher 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 fire extinguisher is judged and by whom.",
                                        "questions": [
                                            {
                                                "id": "condition-assessment-q01",
                                                "text": "What identifies and describes the condition of a fire extinguisher, 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 fire extinguisher, 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 fire extinguisher 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 fire extinguisher 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 fire extinguisher is, and what that position is measured against.",
                                        "questions": [
                                            {
                                                "id": "position-and-frame-q01",
                                                "text": "What identifies and describes the location of a fire extinguisher, 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 fire extinguisher, 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 fire extinguisher 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 fire extinguisher 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 fire extinguisher, 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 fire extinguisher, 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 fire extinguisher 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 fire extinguisher 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 fire extinguisher between them.",
                                        "questions": [
                                            {
                                                "id": "stages-and-transitions-q01",
                                                "text": "What identifies and describes the lifecycle of a fire extinguisher, 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 fire extinguisher, 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 fire extinguisher 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 fire extinguisher, how often and by whom.",
                                "findings": [
                                    {
                                        "id": "observation-record",
                                        "name": "Observation record",
                                        "description": "How an observation of a fire extinguisher 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 fire extinguisher, 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 fire extinguisher, 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 fire extinguisher 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 fire extinguisher 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 fire extinguisher 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 fire extinguisher, 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 fire extinguisher 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 fire extinguisher 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 fire extinguisher 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 fire extinguisher 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 fire extinguisher 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 fire extinguisher, 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 fire extinguisher 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 fire extinguisher and how confident it is.",
                                        "questions": [
                                            {
                                                "id": "claim-provenance-q01",
                                                "text": "What identifies and describes a claim about a fire extinguisher, 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 fire extinguisher, 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 fire extinguisher 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 fire extinguisher is retired without being erased.",
                                        "questions": [
                                            {
                                                "id": "validity-and-supersession-q01",
                                                "text": "What identifies and describes the validity of a claim about a fire extinguisher, 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 fire extinguisher, 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 fire extinguisher 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
            }
        }
    }
}