{
    "model": {
        "rank": 6473,
        "code": "thing-q214769",
        "model_id": "vr.tr.magnesium-oxide",
        "name": "magnesium oxide",
        "purpose": "Enable an AI agent to recognise magnesium oxide, assess a particular material's composition and reactive state, and determine its suitability for a specified use or transformation.",
        "family": "Thing Registry",
        "category": "Physical world and living systems",
        "status": "research-draft",
        "kind": "thing",
        "plane": "PHY",
        "domain": "PHY.MAT",
        "industry": "",
        "version": "",
        "url": "/models/thing/q214769/",
        "tier": 2,
        "score": 60,
        "payload": {
            "layer": "wikidata",
            "aliases": [],
            "aliasCount": 0,
            "merged": 0,
            "knownIn": 60,
            "facets": null,
            "markers": [],
            "lexicalClass": "",
            "senseRank": null,
            "alsoRegisteredAs": null,
            "source": {
                "dataset": "wikidata",
                "item": "Q214769",
                "url": "https://www.wikidata.org/wiki/Q214769",
                "license": "CC0 1.0"
            }
        },
        "research": {
            "vercy": "1.0-draft",
            "publication": {
                "status": "research-draft",
                "adjudicationStatus": "unreviewed",
                "publishableCanonical": false,
                "generatedAt": "2026-09-07T14:44:40Z",
                "providers": [
                    "Codex",
                    "Grok"
                ],
                "missingProviders": [],
                "pass": 2,
                "cost": {
                    "grok": {
                        "usd": 0.00510238,
                        "turns": 1,
                        "seconds": 11.4,
                        "error": null
                    },
                    "codex": {
                        "seconds": 92.2,
                        "error": "Reading additional input from stdin...\nOpenAI Codex v0.153.3\n--------\nworkdir: R:\\02_PROJECTS\\02_Meta_Models_Platforms\\Ver.cy\\current\\thing-registry-backlog\nmodel: gpt-6-astra\nprovider: openai\napproval: never\nsandbox: read-only\nreasoning effort: none\nreasoning summaries: none\nsession id: 01a07c52-aef5-7cf2-844d-ecf32fe15002\n--------\nuser\nYou are drafting a Vercy meta-model for one registered thing. Answer as JSON only, no prose around it.\n\nThing: magnesium oxide\nRegistry id: vr.tr.magnesium-oxide\nPlane / domain: PHY / PHY.MAT\nRegistry definition: (none recorded)\nNames folded into this entry: ("
                    }
                }
            },
            "metaModel": {
                "id": "THING-Q214769",
                "registryId": "vr.tr.magnesium-oxide",
                "name": "magnesium oxide",
                "version": "0.1.0-research.1",
                "entryKind": "thing",
                "family": "Thing Registry",
                "domain": [
                    "PHY.MAT"
                ],
                "status": "research-draft"
            },
            "canonicalUrl": "https://ver.cy/models/thing/q214769/",
            "model": {
                "registry_id": "vr.tr.magnesium-oxide",
                "name": "magnesium oxide",
                "purpose": "Enable an AI agent to recognise magnesium oxide, assess a particular material's composition and reactive state, and determine its suitability for a specified use or transformation.",
                "definition": "Magnesium oxide (MgO) is an ionic alkaline-earth oxide whose cubic rock-salt lattice, high melting point, and basic surface chemistry make it a refractory, industrial-chemical, and biomedical material rather than a generic magnesium salt.",
                "scope_statement": "This model owns magnesium oxide as the substance registered under vr.tr.magnesium-oxide in PHY / PHY.MAT, including the identity, grade, physical form, alteration and application-relevant properties of identifiable samples or lots.",
                "in_scope": [
                    "Evidence that a material contains magnesium oxide rather than merely reporting magnesium content as MgO equivalent.",
                    "MgO phase content, impurities and evidence of hydration or carbonation.",
                    "Production and thermal history relevant to the material's grade and reactivity.",
                    "Particle size, surface area, density and physical condition of powders, grains or consolidated MgO.",
                    "Measured performance and acceptance constraints for a specified material use."
                ],
                "out_of_scope": [
                    "Magnesium metal, magnesium hydroxide, magnesium carbonate and other magnesium compounds as independent substances.",
                    "Magnesite deposits, mineral extraction operations and whole production plants.",
                    "Complete refractory bricks, cement systems and composites containing MgO.",
                    "Finished medicines, supplements and patient-specific dosing decisions.",
                    "Whole treatment processes, furnaces and electrical devices in which MgO is used."
                ],
                "distinguishing_features": [
                    "Confirm MgO identity using phase-sensitive evidence alongside composition; the substance has formula MgO, while a total-magnesium assay alone does not identify its chemical form. [PubChem: Magnesium Oxide](https://pubchem.ncbi.nlm.nih.gov/compound/magnesium_oxide)",
                    "Use phase analysis to distinguish MgO from magnesium hydroxide; record mixed or partially hydrated material explicitly rather than treating every magnesium-bearing white powder as MgO.",
                    "Distinguish magnesium carbonate and carbonate-bearing alteration products through phase or carbonate-specific analysis; loss on ignition alone does not uniquely establish carbonate content.",
                    "Measure calcium and identify relevant phases when distinguishing MgO from calcium oxide or mixed calcium-magnesium oxide material.",
                    "Separate chemical identity from processing grade: dead-burned material remains MgO despite its low reactivity, so slow hydration does not by itself disprove identity. [Martin Marietta: Magnesium Oxide](https://magnesiaspecialties.com/products/magnesiumoxide)"
                ],
                "characteristics": [
                    {
                        "name": "Identity evidence",
                        "kind": "relation",
                        "unit_or_values": "Sample-linked analytical reports and substance identifiers",
                        "why_it_matters": "Connects the MgO identification to evidence rather than a trade name or appearance."
                    },
                    {
                        "name": "MgO content and reporting basis",
                        "kind": "measurement",
                        "unit_or_values": "Mass %; distinguish phase fraction, chemical assay and MgO-equivalent calculation; specify as-received, dry or ignited basis",
                        "why_it_matters": "Prevents magnesium in other compounds from being mistaken for available MgO."
                    },
                    {
                        "name": "Processing grade",
                        "kind": "category",
                        "unit_or_values": "Caustic-calcined, hard-burned, dead-burned, fused, other documented designation or unknown",
                        "why_it_matters": "Provides a starting interpretation of thermal history that must be checked against measured properties."
                    },
                    {
                        "name": "Hydroxide and carbonate phase content",
                        "kind": "measurement",
                        "unit_or_values": "Mass % by identified phase, with method and detection limit",
                        "why_it_matters": "Tracks chemical alteration and the difference between original grade and present composition."
                    },
                    {
                        "name": "Impurity profile",
                        "kind": "measurement",
                        "unit_or_values": "Mass % or mg/kg for specified constituents, with reporting basis",
                        "why_it_matters": "Supports application-specific decisions about contamination, compatibility and purity."
                    },
                    {
                        "name": "Particle size distribution",
                        "kind": "measurement",
                        "unit_or_values": "µm or mm; distribution or sieve fractions, with dispersion method",
                        "why_it_matters": "Affects handling and reaction behaviour and distinguishes particles from agglomerates."
                    },
                    {
                        "name": "Specific surface area",
                        "kind": "measurement",
                        "unit_or_values": "m²/g, with method and sample pretreatment",
                        "why_it_matters": "Helps interpret accessible surface without treating surface area as a complete reactivity measurement."
                    },
                    {
                        "name": "Density and porosity",
                        "kind": "measurement",
                        "unit_or_values": "kg/m³ or g/cm³ and volume %; distinguish bulk, apparent and skeletal measurements",
                        "why_it_matters": "Separates packing behaviour from grain or consolidated-material structure."
                    },
                    {
                        "name": "Hydration response",
                        "kind": "measurement",
                        "unit_or_values": "Conversion % versus time at stated temperature, water ratio and mixing conditions",
                        "why_it_matters": "Determines whether the material's actual response fits the intended transformation."
                    },
                    {
                        "name": "Acid neutralisation response",
                        "kind": "measurement",
                        "unit_or_values": "mol H+ consumed/g and time to a specified endpoint under a named protocol",
                        "why_it_matters": "Separates neutralising capacity from reaction speed and avoids treating slurry pH as sufficient evidence."
                    },
                    {
                        "name": "Exposure and physical condition",
                        "kind": "state",
                        "unit_or_values": "Documented dry storage, moisture exposure, caking, contamination, suspected alteration or unknown",
                        "why_it_matters": "Indicates when an earlier certificate may no longer describe the material."
                    },
                    {
                        "name": "Application qualification",
                        "kind": "relation",
                        "unit_or_values": "Material lot linked to intended use, acceptance specification, test evidence and disposition",
                        "why_it_matters": "Prevents suitability for one use from being interpreted as permission for every use."
                    }
                ],
                "affordances": [
                    "Identify and classify a sample as MgO, an MgO-containing mixture or an unresolved material.",
                    "Compare lots against a specified chemical, reactive or physical performance requirement.",
                    "Select or reject MgO as feedstock for controlled hydration or acid neutralisation using measured response.",
                    "Assess an MgO lot for refractory or electrical-insulation use using application-specific evidence.",
                    "Trigger retesting, segregation or revised storage after moisture exposure, caking or suspected contamination.",
                    "Record consumption or conversion of MgO and link the resulting hydroxide, salt or composite to its neighbouring model."
                ]
            },
            "sources": [
                {
                    "id": "placeholder",
                    "title": "Research in progress",
                    "url": "",
                    "what_it_supports": "pending"
                }
            ],
            "structure": {
                "bundles": [
                    {
                        "id": "mgo-identity-and-composition",
                        "name": "MgO identity and composition",
                        "description": "Establish what material is present and what an MgO content claim actually measures.",
                        "rationale": "A magnesium assay, MgO-equivalent result and identified MgO phase are different evidence.",
                        "layers": [
                            {
                                "id": "substance-and-phase-identification",
                                "name": "Substance and phase identification",
                                "description": "Connect the registered substance to the observed phases in a sample.",
                                "findings": [
                                    {
                                        "id": "confirmed-mgo-presence",
                                        "name": "Confirmed MgO presence",
                                        "description": "Record the evidence supporting MgO identification and any competing interpretation.",
                                        "questions": [
                                            {
                                                "text": "What analytical evidence identifies MgO rather than magnesium hydroxide, magnesium carbonate or another magnesium compound?",
                                                "kind": "definition",
                                                "id": "confirmed-mgo-presence-q01"
                                            },
                                            {
                                                "text": "Does the identification describe an isolated MgO material, an MgO-rich mixture or only an MgO constituent within another material?",
                                                "kind": "boundary",
                                                "id": "confirmed-mgo-presence-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "assay-and-secondary-constituents",
                                "name": "Assay and secondary constituents",
                                "description": "Interpret purity claims without hiding their basis or unmeasured components.",
                                "findings": [
                                    {
                                        "id": "interpretable-composition",
                                        "name": "Interpretable composition",
                                        "description": "Retain assay basis, secondary phases and detection limits as part of the composition record.",
                                        "questions": [
                                            {
                                                "text": "Is the reported MgO percentage a phase measurement, an assay or a conversion from total magnesium, and on what moisture or ignition basis?",
                                                "kind": "measurement",
                                                "id": "interpretable-composition-q01"
                                            },
                                            {
                                                "text": "What amounts of hydroxide, carbonate, calcium-bearing material, silica, iron-bearing material and other use-relevant impurities were measured?",
                                                "kind": "measurement",
                                                "id": "interpretable-composition-q02"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "thermal-history-and-physical-form",
                        "name": "Thermal history and physical form",
                        "description": "Describe the processing and structure needed to interpret a commercial MgO grade.",
                        "rationale": "MgO identity alone cannot establish the behaviour of a calcined powder, dense grain or fused material.",
                        "layers": [
                            {
                                "id": "production-route-and-grade",
                                "name": "Production route and grade",
                                "description": "Separate documented processing history from a supplier's grade label.",
                                "findings": [
                                    {
                                        "id": "supported-grade-designation",
                                        "name": "Supported grade designation",
                                        "description": "Record precursor, calcination or fusion history and the evidence behind the supplied grade.",
                                        "questions": [
                                            {
                                                "text": "What precursor, production route and thermal treatment are documented for this lot?",
                                                "kind": "provenance",
                                                "id": "supported-grade-designation-q01"
                                            },
                                            {
                                                "text": "How does the supplier define its calcined, hard-burned, dead-burned or fused designation, and which measured properties support it?",
                                                "kind": "definition",
                                                "id": "supported-grade-designation-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "particles-surfaces-and-packing",
                                "name": "Particles, surfaces and packing",
                                "description": "Describe the physical form at the scale relevant to handling and performance.",
                                "findings": [
                                    {
                                        "id": "measured-physical-form",
                                        "name": "Measured physical form",
                                        "description": "Distinguish particle size, agglomeration, accessible surface and density measurements.",
                                        "questions": [
                                            {
                                                "text": "What particle size distribution and specific surface area were measured, using which dispersion and pretreatment procedures?",
                                                "kind": "measurement",
                                                "id": "measured-physical-form-q01"
                                            },
                                            {
                                                "text": "Is the material powder, granules, dense grains or consolidated MgO, and which bulk density, grain density or porosity measurements describe it?",
                                                "kind": "measurement",
                                                "id": "measured-physical-form-q02"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "reaction-capacity-and-kinetics",
                        "name": "Reaction capacity and kinetics",
                        "description": "Record how this MgO responds to water and acid under specified conditions.",
                        "rationale": "An agent needs measured reaction behaviour to distinguish a usable reactive feedstock from material that reacts too slowly for the task.",
                        "layers": [
                            {
                                "id": "hydration-behaviour",
                                "name": "Hydration behaviour",
                                "description": "Assess conversion toward magnesium hydroxide without assuming a universal hydration rate.",
                                "findings": [
                                    {
                                        "id": "conditioned-hydration-response",
                                        "name": "Conditioned hydration response",
                                        "description": "MgO hydration produces magnesium hydroxide; response must be recorded with test conditions and conversion evidence. [MgO hydration study](https://pmc.ncbi.nlm.nih.gov/articles/PMC6212817/)",
                                        "questions": [
                                            {
                                                "text": "What MgO conversion versus time was measured at the stated temperature, water-to-solid ratio and mixing conditions?",
                                                "kind": "measurement",
                                                "id": "conditioned-hydration-response-q01"
                                            },
                                            {
                                                "text": "What measured heat release, volume change or residual unreacted MgO constrains the proposed hydration operation?",
                                                "kind": "action",
                                                "id": "conditioned-hydration-response-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "acid-response",
                                "name": "Acid response",
                                "description": "Separate available neutralising capacity from the speed of reaching a process endpoint.",
                                "findings": [
                                    {
                                        "id": "usable-neutralisation-performance",
                                        "name": "Usable neutralisation performance",
                                        "description": "Record capacity and kinetics under a defined acid challenge rather than relying on nominal purity.",
                                        "questions": [
                                            {
                                                "text": "What acid consumption and time to endpoint were measured, with which acid, concentration, temperature and mixing protocol?",
                                                "kind": "measurement",
                                                "id": "usable-neutralisation-performance-q01"
                                            },
                                            {
                                                "text": "Does the measured response meet the target process residence time, endpoint and residual-solids limits?",
                                                "kind": "action",
                                                "id": "usable-neutralisation-performance-q02"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "alteration-and-storage-condition",
                        "name": "Alteration and storage condition",
                        "description": "Determine whether exposure or handling has changed the material since its last characterisation.",
                        "rationale": "An original MgO grade certificate cannot alone establish the present state of an exposed or altered lot.",
                        "layers": [
                            {
                                "id": "chemical-alteration",
                                "name": "Chemical alteration",
                                "description": "Track evidence of hydration, carbonate formation and remaining MgO.",
                                "findings": [
                                    {
                                        "id": "present-oxide-state",
                                        "name": "Present oxide state",
                                        "description": "Distinguish measured alteration from an inference based only on storage history or mass change.",
                                        "questions": [
                                            {
                                                "text": "What moisture, water and atmospheric exposure occurred after the most recent composition and reactivity tests?",
                                                "kind": "provenance",
                                                "id": "present-oxide-state-q01"
                                            },
                                            {
                                                "text": "What phase analysis or complementary thermal measurements establish remaining MgO, hydroxide and carbonate rather than an undifferentiated ignition loss?",
                                                "kind": "measurement",
                                                "id": "present-oxide-state-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "lot-representativeness-and-retest",
                                "name": "Lot representativeness and retest",
                                "description": "Determine whether available results represent the material now being selected.",
                                "findings": [
                                    {
                                        "id": "current-condition-disposition",
                                        "name": "Current condition disposition",
                                        "description": "Connect caking, contamination and sampling location to the need for renewed MgO testing.",
                                        "questions": [
                                            {
                                                "text": "Do samples represent exposed surfaces, container interiors and any visibly caked or segregated fractions?",
                                                "kind": "provenance",
                                                "id": "current-condition-disposition-q01"
                                            },
                                            {
                                                "text": "Which changes require retesting composition, particle behaviour or reactivity before the lot can be released for its intended use?",
                                                "kind": "action",
                                                "id": "current-condition-disposition-q02"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "use-qualification-and-transformation-boundaries",
                        "name": "Use qualification and transformation boundaries",
                        "description": "Turn MgO-specific evidence into a bounded suitability decision.",
                        "rationale": "Chemical identity does not establish interchangeability between reactive, refractory, electrical or ingestible grades.",
                        "layers": [
                            {
                                "id": "application-specific-acceptance",
                                "name": "Application-specific acceptance",
                                "description": "Link material properties to the exact duty and applicable acceptance criteria.",
                                "findings": [
                                    {
                                        "id": "supported-use-decision",
                                        "name": "Supported use decision",
                                        "description": "Record qualified, rejected or unresolved suitability separately for each proposed application.",
                                        "questions": [
                                            {
                                                "text": "Which specification governs the proposed use, and what evidence addresses its MgO purity, impurities, physical form and performance requirements?",
                                                "kind": "boundary",
                                                "id": "supported-use-decision-q01"
                                            },
                                            {
                                                "text": "For the intended duty, do tests address neutralisation kinetics, hydration behaviour, high-temperature compatibility or electrical performance under the actual service conditions?",
                                                "kind": "action",
                                                "id": "supported-use-decision-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "handling-and-material-handoff",
                                "name": "Handling and material handoff",
                                "description": "Bound the permitted operation and identify when its product belongs to another model.",
                                "findings": [
                                    {
                                        "id": "bounded-mgo-operation",
                                        "name": "Bounded MgO operation",
                                        "description": "Associate handling constraints and transformation records with the specific MgO form and intended process.",
                                        "questions": [
                                            {
                                                "text": "What current grade-specific safety information and process assessment govern dust handling, water contact, acid addition or heating?",
                                                "kind": "action",
                                                "id": "bounded-mgo-operation-q01"
                                            },
                                            {
                                                "text": "After reaction or incorporation, what MgO remains, and which resulting hydroxide, salt, refractory or composite model should own the product state?",
                                                "kind": "boundary",
                                                "id": "bounded-mgo-operation-q02"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "evidence-and-external-alignment",
                        "name": "Evidence and external alignment",
                        "description": "What the world already says about this thing, gathered so the model can be checked against it.",
                        "rationale": "A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.",
                        "layers": [
                            {
                                "id": "reported-evidence",
                                "name": "Reported evidence",
                                "description": "Findings from the breadth pass, kept separate from the structural claims.",
                                "findings": [
                                    {
                                        "id": "evidence-kinds",
                                        "name": "Kinds and varieties",
                                        "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.",
                                        "evidence": [
                                            "dead-burned (sintered) magnesia",
                                            "caustic-calcined (light-burned) magnesia",
                                            "fused magnesia",
                                            "seawater/brine-derived magnesia",
                                            "pharmaceutical/food-grade MgO",
                                            "nano/high-surface-area MgO",
                                            "periclase (natural mineral)",
                                            "electrically fused or high-purity single-crystal MgO"
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-kinds-q01",
                                                "text": "Which of these kinds and varieties hold for the sense of magnesium oxide this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    }
                ]
            },
            "openQuestions": [
                "Does an existing Vercy world model already own magnesium oxide or periclase, requiring this registry entry to link to it?",
                "Which authoritative methods and reporting conventions should distinguish actual MgO phase content from MgO-equivalent assay across the intended application sectors?",
                "How should supplier-dependent calcined and burned grade names map to comparable measured reactivity without imposing unsupported universal thresholds?",
                "What evidence and application-specific limits should trigger retesting or rejection after hydration, carbonation, moisture exposure or caking?",
                "Which use-specific standards and validation data are required before qualifying MgO for refractory, electrical-insulation, food, feed or pharmaceutical applications?"
            ],
            "statistics": {
                "bundles": 6,
                "layers": 11,
                "findings": 11,
                "questions": 21
            }
        },
        "draft": {
            "generator": "vr.draft.v3",
            "status": "draft-generated",
            "researched": false,
            "archetype": "chemical substance or material",
            "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 magnesium oxide, record what state it is in, and decide what may be done with it.",
            "whatItIs": "Enable an AI agent to recognise magnesium oxide, assess a particular material's composition and reactive state, and determine its suitability for a specified use or transformation.",
            "characteristics": {
                "substance": "material",
                "origin": "natural",
                "agency": "inert",
                "mobility": "varies"
            },
            "whatYouCanDoWithIt": [
                "observed and measured",
                "consumed or used up"
            ],
            "distinguishingFeatures": [
                "Described in 60 Wikipedia languages, which is a measure of how widely the thing is known, not of how important it is."
            ],
            "openQuestionsForResearch": [
                "Which of the bundles below does a real task actually need, and which are ceremony?",
                "What does this thing have that the facets do not capture at all?",
                "Which neighbouring kind is most often confused with a magnesium oxide, 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",
                "use it up, and then need more of it"
            ],
            "howItIsRecognised": [
                "Not recognisable by sight in any reliable way. Appearance varies with grade, form and additives; identification is by label, by documentation, or by assay."
            ],
            "relatedModels": [],
            "standing": "Described in 60 Wikipedia languages, which measures how widely it is written about rather than how important or how common it is.",
            "structure": {
                "bundles": [
                    {
                        "id": "identity-and-classification",
                        "name": "Identity, naming and classification",
                        "description": "How an agent tells one magnesium oxide from another, and a magnesium oxide 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 magnesium oxide, 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 magnesium oxide, 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 magnesium oxide 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 magnesium oxide, 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 magnesium oxide, 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 magnesium oxide 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 magnesium oxide 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 magnesium oxide, 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 magnesium oxide, 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 magnesium oxide 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 magnesium oxide from the things most often confused with it.",
                                        "questions": [
                                            {
                                                "id": "distinguishing-features-q01",
                                                "text": "What identifies and describes what distinguishes a magnesium oxide, 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 magnesium oxide, 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 magnesium oxide 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 magnesium oxide 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 magnesium oxide, 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 magnesium oxide, 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 magnesium oxide 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 magnesium oxide is built from and which parts are replaceable.",
                                        "questions": [
                                            {
                                                "id": "parts-and-materials-q01",
                                                "text": "What identifies and describes the composition of a magnesium oxide, 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 magnesium oxide, 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 magnesium oxide 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 magnesium oxide is judged and by whom.",
                                        "questions": [
                                            {
                                                "id": "condition-assessment-q01",
                                                "text": "What identifies and describes the condition of a magnesium oxide, 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 magnesium oxide, 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 magnesium oxide 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 magnesium oxide 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 magnesium oxide is, and what that position is measured against.",
                                        "questions": [
                                            {
                                                "id": "position-and-frame-q01",
                                                "text": "What identifies and describes the location of a magnesium oxide, 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 magnesium oxide, 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 magnesium oxide 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 magnesium oxide 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 magnesium oxide, 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 magnesium oxide, 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 magnesium oxide 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 magnesium oxide 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 magnesium oxide between them.",
                                        "questions": [
                                            {
                                                "id": "stages-and-transitions-q01",
                                                "text": "What identifies and describes the lifecycle of a magnesium oxide, 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 magnesium oxide, 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 magnesium oxide 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 magnesium oxide, how often and by whom.",
                                "findings": [
                                    {
                                        "id": "observation-record",
                                        "name": "Observation record",
                                        "description": "How an observation of a magnesium oxide 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 magnesium oxide, 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 magnesium oxide, 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 magnesium oxide is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "use-and-operation",
                        "name": "Use and operation",
                        "description": "What can be done with a magnesium oxide and what it takes to do it.",
                        "rationale": "An agent that can recognise a thing but not act on it has only half a model.",
                        "layers": [
                            {
                                "id": "intended-use",
                                "name": "Intended use and function",
                                "description": "What a magnesium oxide is for, and what it is used for anyway.",
                                "findings": [
                                    {
                                        "id": "function-and-purpose",
                                        "name": "Function, purpose and misuse",
                                        "description": "The function a magnesium oxide performs and the uses that fall outside it.",
                                        "questions": [
                                            {
                                                "id": "function-and-purpose-q01",
                                                "text": "What identifies and describes the use of a magnesium oxide, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "function-and-purpose-q02",
                                                "text": "Who or what asserted this about the use of a magnesium oxide, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "function-and-purpose-q03",
                                                "text": "What may an agent decide or do once the use of a magnesium oxide is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "handling-and-procedure",
                                "name": "Handling and procedure",
                                "description": "The steps, skills and tools involved in using a magnesium oxide.",
                                "findings": [
                                    {
                                        "id": "procedures-and-skills",
                                        "name": "Procedures, skills and required tools",
                                        "description": "What an agent needs before it can act on a magnesium oxide at all.",
                                        "questions": [
                                            {
                                                "id": "procedures-and-skills-q01",
                                                "text": "What identifies and describes handling a magnesium oxide, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "procedures-and-skills-q02",
                                                "text": "Who or what asserted this about handling a magnesium oxide, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "procedures-and-skills-q03",
                                                "text": "What may an agent decide or do once handling a magnesium oxide is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "supply-and-consumption",
                                "name": "Supply and consumption",
                                "description": "Quantities, rates and what running out means.",
                                "findings": [
                                    {
                                        "id": "consumption-and-stock",
                                        "name": "Consumption, stock and replenishment",
                                        "description": "How much of a magnesium oxide there is and how fast it goes.",
                                        "questions": [
                                            {
                                                "id": "consumption-and-stock-q01",
                                                "text": "What identifies and describes the supply of a magnesium oxide, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "consumption-and-stock-q02",
                                                "text": "Who or what asserted this about the supply of a magnesium oxide, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "consumption-and-stock-q03",
                                                "text": "What may an agent decide or do once the supply of a magnesium oxide is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "composition-and-identity",
                        "name": "Composition, grade and chemical identity",
                        "description": "What magnesium oxide is made of and how pure the thing in hand is.",
                        "rationale": "Grade decides what a substance may be used for, so a model that records only the name cannot support any decision about use.",
                        "layers": [
                            {
                                "id": "chemical-identity",
                                "name": "Chemical identity",
                                "description": "Formula, structure and the registry numbers that name it unambiguously.",
                                "findings": [
                                    {
                                        "id": "identity-record",
                                        "name": "Identity and registry numbers",
                                        "description": "What identifies this substance across suppliers and regulators.",
                                        "questions": [
                                            {
                                                "id": "identity-record-q01",
                                                "text": "What formula, structure and registry identifiers name magnesium oxide unambiguously?",
                                                "kind": "definition"
                                            },
                                            {
                                                "id": "identity-record-q02",
                                                "text": "Which related substances share a name in common use but not an identifier?",
                                                "kind": "boundary"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "grade-and-impurities",
                                "name": "Grade, purity and impurities",
                                "description": "The specification a batch meets and what else is in it.",
                                "findings": [
                                    {
                                        "id": "specification",
                                        "name": "Specification and assay",
                                        "description": "How purity is stated and measured, and which impurities matter.",
                                        "questions": [
                                            {
                                                "id": "specification-q01",
                                                "text": "What grades of magnesium oxide exist, how is purity assayed, and which impurities are limited?",
                                                "kind": "measurement"
                                            },
                                            {
                                                "id": "specification-q02",
                                                "text": "Which use requires which grade, and what happens when a lower grade is substituted?",
                                                "kind": "action"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "properties-and-behaviour",
                        "name": "Properties and behaviour",
                        "description": "How magnesium oxide behaves under conditions an agent can measure or change.",
                        "rationale": "Physical constants are the part of a substance model that transfers between contexts, and each needs its unit and its conditions.",
                        "layers": [
                            {
                                "id": "physical-constants",
                                "name": "Physical constants",
                                "description": "Values that hold for the pure substance, with their conditions.",
                                "findings": [
                                    {
                                        "id": "constants-record",
                                        "name": "Constants and conditions",
                                        "description": "The quantities worth recording and the state they apply in.",
                                        "questions": [
                                            {
                                                "id": "constants-record-q01",
                                                "text": "What are the defining physical constants of magnesium oxide, in what units and under what conditions?",
                                                "kind": "measurement"
                                            },
                                            {
                                                "id": "constants-record-q02",
                                                "text": "Which of these values change with grade or form rather than being fixed?",
                                                "kind": "boundary"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "stability-and-reactivity",
                                "name": "Stability and reactivity",
                                "description": "What it reacts with, degrades into, and how it is stored.",
                                "findings": [
                                    {
                                        "id": "incompatibilities",
                                        "name": "Incompatibilities and degradation",
                                        "description": "What must not meet it, and what it becomes over time.",
                                        "questions": [
                                            {
                                                "id": "incompatibilities-q01",
                                                "text": "What is magnesium oxide incompatible with, and what does it degrade into under storage?",
                                                "kind": "definition"
                                            },
                                            {
                                                "id": "incompatibilities-q02",
                                                "text": "What storage and handling does that require, and who is competent to do it?",
                                                "kind": "action"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "hazard-and-regulation",
                        "name": "Hazard classification and regulation",
                        "description": "How magnesium oxide can harm, and what the law says about holding and moving it.",
                        "rationale": "A substance model without its hazard class and its regulatory identity is unusable in exactly the situations that matter.",
                        "layers": [
                            {
                                "id": "hazard-class",
                                "name": "Hazard classification",
                                "description": "Classified hazards, exposure limits and protective measures.",
                                "findings": [
                                    {
                                        "id": "classified-hazards",
                                        "name": "Classified hazards and limits",
                                        "description": "The classification, the scheme it belongs to, and the limits set.",
                                        "questions": [
                                            {
                                                "id": "classified-hazards-q01",
                                                "text": "How is magnesium oxide classified for hazard, under which scheme, and what exposure limits apply?",
                                                "kind": "definition"
                                            },
                                            {
                                                "id": "classified-hazards-q02",
                                                "text": "What protection does handling require, and what must an agent refuse to do without it?",
                                                "kind": "action"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "regulatory-identity",
                                "name": "Regulatory identity and control",
                                "description": "Registration, restriction and transport rules by jurisdiction.",
                                "findings": [
                                    {
                                        "id": "controls",
                                        "name": "Controls and jurisdiction",
                                        "description": "Where it is restricted and what the restriction attaches to.",
                                        "questions": [
                                            {
                                                "id": "controls-q01",
                                                "text": "Which registrations, restrictions or transport rules cover magnesium oxide, and where?",
                                                "kind": "provenance"
                                            },
                                            {
                                                "id": "controls-q02",
                                                "text": "Does the control attach to the substance, its concentration, or its intended use?",
                                                "kind": "boundary"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "provenance-and-evidence",
                        "name": "Provenance, evidence and time",
                        "description": "Where every claim about a magnesium oxide 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 magnesium oxide and how confident it is.",
                                        "questions": [
                                            {
                                                "id": "claim-provenance-q01",
                                                "text": "What identifies and describes a claim about a magnesium oxide, 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 magnesium oxide, 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 magnesium oxide 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 magnesium oxide is retired without being erased.",
                                        "questions": [
                                            {
                                                "id": "validity-and-supersession-q01",
                                                "text": "What identifies and describes the validity of a claim about a magnesium oxide, 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 magnesium oxide, 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 magnesium oxide is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    }
                ]
            },
            "statistics": {
                "bundles": 9,
                "layers": 20,
                "findings": 22,
                "questions": 60
            }
        }
    }
}