{
    "model": {
        "rank": 4531,
        "code": "thing-q171917",
        "model_id": "vr.tr.calcite",
        "name": "calcite",
        "purpose": "Enable an AI agent to recognise calcite, assess the condition and suitability of a specimen or material lot, and choose appropriate handling, testing and use.",
        "family": "Thing Registry",
        "category": "Physical world and living systems",
        "status": "research-draft",
        "kind": "thing",
        "plane": "PHY",
        "domain": "PHY.MAT",
        "industry": "",
        "version": "",
        "url": "/models/thing/q171917/",
        "tier": 2,
        "score": 74,
        "payload": {
            "layer": "wikidata",
            "aliases": [
                "nailhead spar",
                "glendonite",
                "plumboan calcite",
                "aphrite",
                "onyx marble",
                "cobaltocalcite",
                "manganoan calcite",
                "Iceland spar"
            ],
            "aliasCount": 8,
            "merged": 8,
            "knownIn": 74,
            "facets": null,
            "markers": [],
            "lexicalClass": "",
            "senseRank": null,
            "alsoRegisteredAs": "vr.tr.calcite",
            "source": {
                "dataset": "wikidata",
                "item": "Q171917",
                "url": "https://www.wikidata.org/wiki/Q171917",
                "license": "CC0 1.0"
            }
        },
        "research": {
            "vercy": "1.0-draft",
            "publication": {
                "status": "research-draft",
                "adjudicationStatus": "unreviewed",
                "publishableCanonical": false,
                "generatedAt": "2026-09-09T20:26:48Z",
                "providers": [
                    "Codex"
                ],
                "breadth": "recalled by Codex without web access - no source was read",
                "missingProviders": [],
                "pass": 2,
                "cost": {
                    "grok": {
                        "seconds": 24,
                        "error": "Reading additional input from stdin...\nOpenAI Codex v0.153.4\n--------\nworkdir: R:\\02_PROJECTS\\02_Meta_Models_Platforms\\Ver.cy\\current\\thing-registry-backlog\nmodel: gpt-6-astra\nprovider: openai\napproval: never\nsandbox: read-only\nreasoning effort: none\nreasoning summaries: none\nsession id: 01a087d9-0ce2-7921-b2f7-59844f035255\n--------\nuser\nDescribe what is already known about one registered thing. Answer as JSON only, no prose around it.\n\nThing: calcite\nSense to describe: (none recorded)\nDomain code: PHY.MAT\nAlso known as: (none)\n\n\nContext for this batch of 1001 things:\n# Batch 005: 1001 registe",
                        "usd": 0,
                        "recall": true
                    },
                    "codex": {
                        "seconds": 64.7,
                        "error": "Reading additional input from stdin...\nOpenAI Codex v0.153.4\n--------\nworkdir: R:\\02_PROJECTS\\02_Meta_Models_Platforms\\Ver.cy\\current\\thing-registry-backlog\nmodel: gpt-6-astra\nprovider: openai\napproval: never\nsandbox: read-only\nreasoning effort: none\nreasoning summaries: none\nsession id: 01a087d9-0cf1-7c90-9531-83e9304c839c\n--------\nuser\nYou are drafting a Vercy meta-model for one registered thing. Answer as JSON only, no prose around it.\n\nThing: calcite\nRegistry id: vr.tr.calcite\nPlane / domain: PHY / PHY.MAT\nRegistry definition: (none recorded)\nNames folded into this entry: (none)\n\n\nContext "
                    }
                }
            },
            "metaModel": {
                "id": "THING-Q171917",
                "registryId": "vr.tr.calcite",
                "name": "calcite",
                "version": "0.1.0-research.1",
                "entryKind": "thing",
                "family": "Thing Registry",
                "domain": [
                    "PHY.MAT"
                ],
                "status": "research-draft"
            },
            "canonicalUrl": "https://ver.cy/models/thing/q171917/",
            "model": {
                "registry_id": "vr.tr.calcite",
                "name": "calcite",
                "purpose": "Enable an AI agent to recognise calcite, assess the condition and suitability of a specimen or material lot, and choose appropriate handling, testing and use.",
                "definition": "Calcite is the trigonal crystalline mineral form of calcium carbonate (CaCO₃), stable under ordinary surface conditions and a major constituent of limestone, marble and many biological mineral structures.",
                "scope_statement": "This model owns calcite as the crystalline calcium carbonate mineral phase, including its identification, composition, crystal structure, texture, condition and behaviour under specified conditions; it distinguishes phase-level properties from those of specimens, powders and calcite-bearing materials.",
                "in_scope": [
                    "Identification and abundance of the calcite phase in specimens and material lots",
                    "Composition, substitutions, impurities and application-specific purity",
                    "Crystal form, cleavage, twinning, grain size and optical behaviour",
                    "Dissolution, precipitation, thermal decomposition and surface alteration",
                    "Suitability for specified uses, handling constraints and traceable test evidence"
                ],
                "out_of_scope": [
                    "Aragonite and vaterite as independently modelled calcium carbonate polymorphs",
                    "Limestone, marble and other rocks as complete geological materials",
                    "Finished products containing calcite, including cement, paper, paints and filled polymers",
                    "Mining, grinding, beneficiation and manufacturing processes as operational systems",
                    "Whole caves, aquifers and carbonate depositional environments",
                    "Organisms and biological systems that produce calcite"
                ],
                "distinguishing_features": [
                    "Calcite has nominal composition CaCO3; composition alone cannot distinguish it from aragonite or vaterite, so polymorph identification requires structural evidence.",
                    "Calcite has trigonal crystal symmetry; diffraction or suitable spectroscopic evidence can distinguish its phase from other carbonate minerals.",
                    "Three directions of perfect rhombohedral cleavage distinguish suitable calcite crystals from cubic-cleaving minerals and many noncarbonate lookalikes.",
                    "Mohs hardness of approximately 3 supports identification, although coatings, intergrown phases and specimen condition can affect a scratch test.",
                    "Readily observable effervescence with dilute acid supports carbonate identification; it is not by itself proof of calcite, and test conditions must be recorded."
                ],
                "characteristics": [
                    {
                        "name": "Observed material form",
                        "kind": "category",
                        "unit_or_values": "single crystal | aggregate | powder | calcite-bearing material",
                        "why_it_matters": "Determines which properties belong to the calcite phase and which require measurement on the whole specimen or lot."
                    },
                    {
                        "name": "Calcite phase identification",
                        "kind": "state",
                        "unit_or_values": "suspected | supported | confirmed | unresolved, with method and evidence",
                        "why_it_matters": "Prevents a carbonate reaction or calcium carbonate label from being treated as conclusive polymorph identification."
                    },
                    {
                        "name": "Calcite phase fraction",
                        "kind": "measurement",
                        "unit_or_values": "mass %, with method, uncertainty and detection limits",
                        "why_it_matters": "Separates calcite-rich mixtures from material demonstrated to be predominantly calcite."
                    },
                    {
                        "name": "Composition and impurity profile",
                        "kind": "measurement",
                        "unit_or_values": "mass %, mg/kg or molar fraction, with analyte and reporting basis",
                        "why_it_matters": "Substituted elements, accessory minerals and contamination can affect reactivity, colour and suitability."
                    },
                    {
                        "name": "Particle or grain size",
                        "kind": "measurement",
                        "unit_or_values": "µm or mm; distribution and measurement method",
                        "why_it_matters": "Controls sampling, powder behaviour, accessible surface area and application performance."
                    },
                    {
                        "name": "Crystal integrity",
                        "kind": "state",
                        "unit_or_values": "cleavage, fractures, twins, inclusions and surface damage, with observed extent",
                        "why_it_matters": "Affects mechanical handling, optical use and the interpretation of specimen tests."
                    },
                    {
                        "name": "Optical response",
                        "kind": "measurement",
                        "unit_or_values": "refractive indices and birefringence, dimensionless, with wavelength, temperature and orientation",
                        "why_it_matters": "Supports phase identification and assessment of transparent crystals for optical use."
                    },
                    {
                        "name": "Dissolution response",
                        "kind": "measurement",
                        "unit_or_values": "mol/m²/s or mass loss per time, with solution chemistry, temperature and surface-area basis",
                        "why_it_matters": "Makes acid reactivity and aqueous durability comparable under defined conditions."
                    },
                    {
                        "name": "Thermal state",
                        "kind": "state",
                        "unit_or_values": "unheated | heated with calcite retained | partially decomposed | decomposed | unresolved",
                        "why_it_matters": "Heating history can change composition and invalidate the original material identification."
                    },
                    {
                        "name": "Material identity and grade",
                        "kind": "relation",
                        "unit_or_values": "links to specimen provenance, supplier lot, declared identifiers, grade specification and safety documentation",
                        "why_it_matters": "Connects observations to the actual material without assuming that a generic calcium carbonate record establishes phase, purity or permitted use."
                    }
                ],
                "affordances": [
                    "Select complementary identification tests that distinguish calcite from other carbonates and calcium carbonate polymorphs.",
                    "Assess whether a specimen or lot meets a specified phase-purity, composition, particle-size or optical requirement.",
                    "Choose sampling and testing methods that account for mixed phases, coatings and specimen heterogeneity.",
                    "Evaluate likely dissolution, surface damage or decomposition under a proposed exposure.",
                    "Choose handling and storage measures appropriate to cleavage-sensitive crystals or dust-producing powders.",
                    "Determine whether material-specific evidence supports a proposed use or whether further testing is required."
                ]
            },
            "sources": [],
            "structure": {
                "bundles": [
                    {
                        "id": "calcite-identity",
                        "name": "Calcite identity",
                        "description": "Establishes that the recorded material contains the calcite mineral phase and defines what the record represents.",
                        "rationale": "Calcium carbonate chemistry, commercial naming and carbonate test reactions do not independently establish calcite identity.",
                        "layers": [
                            {
                                "id": "polymorph-discrimination",
                                "name": "Polymorph discrimination",
                                "description": "Separates calcite from other minerals with similar composition or appearance.",
                                "findings": [
                                    {
                                        "id": "phase-evidence",
                                        "name": "Phase evidence",
                                        "description": "Record evidence that specifically supports calcite, including conflicting observations and identification limits.",
                                        "questions": [
                                            {
                                                "text": "What diffraction, spectroscopic or crystallographic evidence identifies calcite rather than aragonite or vaterite?",
                                                "kind": "measurement",
                                                "id": "phase-evidence-q01"
                                            },
                                            {
                                                "text": "Which supporting observations of cleavage, hardness or acid response were made, and under what conditions?",
                                                "kind": "measurement",
                                                "id": "phase-evidence-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "specimen-and-lot-boundary",
                                "name": "Specimen and lot boundary",
                                "description": "Defines whether the subject is a crystal, powder, aggregate or calcite phase within a larger material.",
                                "findings": [
                                    {
                                        "id": "represented-material",
                                        "name": "Represented material",
                                        "description": "Tie the calcite record to a bounded specimen or lot and distinguish host-material properties from phase properties.",
                                        "questions": [
                                            {
                                                "text": "Does this record describe isolated calcite or the calcite component of a rock, coating or manufactured mixture?",
                                                "kind": "boundary",
                                                "id": "represented-material-q01"
                                            },
                                            {
                                                "text": "What collection locality, synthesis history or supplier lot establishes the provenance of the tested material?",
                                                "kind": "provenance",
                                                "id": "represented-material-q02"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "composition-and-phase-purity",
                        "name": "Composition and phase purity",
                        "description": "Describes departures from nominal CaCO3 composition and the presence of other phases.",
                        "rationale": "Chemical assay and mineral-phase purity answer different questions, and both can determine whether calcite is suitable for use.",
                        "layers": [
                            {
                                "id": "calcite-lattice-composition",
                                "name": "Calcite lattice composition",
                                "description": "Tracks composition associated with the calcite phase itself.",
                                "findings": [
                                    {
                                        "id": "substitution-and-assay",
                                        "name": "Substitution and assay",
                                        "description": "Record measured chemistry and the evidence for assigning detected elements to the calcite lattice.",
                                        "questions": [
                                            {
                                                "text": "What calcium carbonate assay and elemental composition were measured, on what moisture basis and with what uncertainty?",
                                                "kind": "measurement",
                                                "id": "substitution-and-assay-q01"
                                            },
                                            {
                                                "text": "Which detected elements are demonstrated lattice substitutions rather than inclusions, coatings or separate minerals?",
                                                "kind": "boundary",
                                                "id": "substitution-and-assay-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "accessory-phases-and-contamination",
                                "name": "Accessory phases and contamination",
                                "description": "Captures components that accompany calcite without being calcite.",
                                "findings": [
                                    {
                                        "id": "noncalcite-components",
                                        "name": "Noncalcite components",
                                        "description": "Identify and quantify other carbonate phases, silicates, surface treatments and contaminants where relevant.",
                                        "questions": [
                                            {
                                                "text": "What fractions of aragonite, dolomite, quartz or other identified phases occur, and what are the detection limits?",
                                                "kind": "measurement",
                                                "id": "noncalcite-components-q01"
                                            },
                                            {
                                                "text": "Are organic treatments, residual processing chemicals or surface deposits present, and how were they introduced?",
                                                "kind": "provenance",
                                                "id": "noncalcite-components-q02"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "crystal-texture-and-performance",
                        "name": "Crystal texture and performance",
                        "description": "Connects calcite crystal structure and material texture to observable mechanical, optical and powder behaviour.",
                        "rationale": "A transparent cleavage crystal and a ground calcite powder require different state descriptions and suitability tests.",
                        "layers": [
                            {
                                "id": "crystal-integrity-and-optics",
                                "name": "Crystal integrity and optics",
                                "description": "Describes individual crystals and features affecting their handling or optical function.",
                                "findings": [
                                    {
                                        "id": "cleavage-and-optical-quality",
                                        "name": "Cleavage and optical quality",
                                        "description": "Record cleavage orientation, damage, twinning and transparency together with any measured optical response.",
                                        "questions": [
                                            {
                                                "text": "Where are cleavage planes, twins, fractures and inclusions relative to the intended loading or optical path?",
                                                "kind": "measurement",
                                                "id": "cleavage-and-optical-quality-q01"
                                            },
                                            {
                                                "text": "What transparency, birefringence or scattering criteria must this crystal meet for its proposed use?",
                                                "kind": "action",
                                                "id": "cleavage-and-optical-quality-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "grain-and-powder-texture",
                                "name": "Grain and powder texture",
                                "description": "Describes calcite aggregates and powders at the scale relevant to their behaviour.",
                                "findings": [
                                    {
                                        "id": "size-surface-and-aggregation",
                                        "name": "Size, surface and aggregation",
                                        "description": "Record particle distributions, morphology, accessible surface area and aggregation without treating them as fixed mineral constants.",
                                        "questions": [
                                            {
                                                "text": "What particle-size distribution and morphology were measured, and did the method distinguish primary particles from agglomerates?",
                                                "kind": "measurement",
                                                "id": "size-surface-and-aggregation-q01"
                                            },
                                            {
                                                "text": "What surface-area, moisture or dispersion measurements are needed to assess this powder for its intended application?",
                                                "kind": "action",
                                                "id": "size-surface-and-aggregation-q02"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "reaction-and-transformation",
                        "name": "Reaction and transformation",
                        "description": "Describes how calcite persists, dissolves, grows or decomposes under specified exposures.",
                        "rationale": "Calcite behaviour depends on solution chemistry, accessible surface and thermal conditions; a context-free stability label is insufficient.",
                        "layers": [
                            {
                                "id": "aqueous-carbonate-behaviour",
                                "name": "Aqueous carbonate behaviour",
                                "description": "Tracks calcite interactions with water, dissolved carbon dioxide and acids.",
                                "findings": [
                                    {
                                        "id": "dissolution-and-growth-state",
                                        "name": "Dissolution and growth state",
                                        "description": "Record exposure conditions and evidence of dissolution or precipitation, distinguishing predicted tendency from observed rate.",
                                        "questions": [
                                            {
                                                "text": "What temperature, pH, dissolved-ion composition and carbon dioxide conditions define the exposure?",
                                                "kind": "measurement",
                                                "id": "dissolution-and-growth-state-q01"
                                            },
                                            {
                                                "text": "What evidence shows calcite dissolving, remaining unchanged or growing, and over what duration?",
                                                "kind": "measurement",
                                                "id": "dissolution-and-growth-state-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "thermal-change",
                                "name": "Thermal change",
                                "description": "Records heating conditions and whether calcite remains present after exposure.",
                                "findings": [
                                    {
                                        "id": "decomposition-evidence",
                                        "name": "Decomposition evidence",
                                        "description": "Assess thermal decomposition through measured changes and product identification rather than assigning an unqualified melting or boiling point.",
                                        "questions": [
                                            {
                                                "text": "What temperature, duration, pressure and gas atmosphere characterised the heating exposure?",
                                                "kind": "provenance",
                                                "id": "decomposition-evidence-q01"
                                            },
                                            {
                                                "text": "What mass-loss, evolved-gas or phase-analysis evidence establishes whether calcite decomposed to calcium oxide and carbon dioxide?",
                                                "kind": "measurement",
                                                "id": "decomposition-evidence-q02"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "use-and-handling-qualification",
                        "name": "Use and handling qualification",
                        "description": "Connects material-specific evidence to application requirements and handling decisions.",
                        "rationale": "Mineral identity alone does not establish commercial grade, exposure controls or suitability for a regulated application.",
                        "layers": [
                            {
                                "id": "grade-and-identity-documentation",
                                "name": "Grade and identity documentation",
                                "description": "Links the actual calcite material to specifications and chemical identity records.",
                                "findings": [
                                    {
                                        "id": "qualified-material-identity",
                                        "name": "Qualified material identity",
                                        "description": "Record declared identifiers and grade claims with their scope, supporting documents and applicability to the tested lot.",
                                        "questions": [
                                            {
                                                "text": "Which CAS, EC or PubChem identifiers are documented, and do they identify calcium carbonate generally or the calcite phase specifically?",
                                                "kind": "definition",
                                                "id": "qualified-material-identity-q01"
                                            },
                                            {
                                                "text": "Which lot-specific results establish compliance with the composition, phase and physical requirements of the intended grade?",
                                                "kind": "action",
                                                "id": "qualified-material-identity-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "handling-and-exposure",
                                "name": "Handling and exposure",
                                "description": "Assesses handling according to material form, impurities and proposed operations.",
                                "findings": [
                                    {
                                        "id": "operation-specific-controls",
                                        "name": "Operation-specific controls",
                                        "description": "Determine controls for dust generation, cleavage damage and chemical or thermal exposure using applicable material evidence.",
                                        "questions": [
                                            {
                                                "text": "What current safety classification and exposure limits apply to this material and its identified impurities in the relevant jurisdiction?",
                                                "kind": "provenance",
                                                "id": "operation-specific-controls-q01"
                                            },
                                            {
                                                "text": "What controls are required when grinding the material, handling fragile crystals or exposing it to acid or heat?",
                                                "kind": "action",
                                                "id": "operation-specific-controls-q02"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "evidence-and-external-alignment",
                        "name": "Evidence and external alignment",
                        "description": "What the world already says about this thing, gathered so the model can be checked against it.",
                        "rationale": "A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.",
                        "layers": [
                            {
                                "id": "reported-evidence",
                                "name": "Reported evidence",
                                "description": "Findings from the breadth pass, kept separate from the structural claims.",
                                "findings": [
                                    {
                                        "id": "evidence-confidence-notes",
                                        "name": "Check these first",
                                        "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                                        "evidence": [
                                            "This describes the mineral species from recall; no sources were consulted.",
                                            "Measured properties vary with composition, temperature and wavelength; the listed optical values describe relatively pure calcite in visible light.",
                                            "Verify mineral-specific registry identifiers, product grades and applicable exposure or regulatory requirements before assigning them; a generic calcium carbonate identity does not establish purity or phase."
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-confidence-notes-q01",
                                                "text": "Which of these check these first hold for the sense of calcite this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-kinds",
                                        "name": "Kinds and varieties",
                                        "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                                        "evidence": [
                                            "Iceland spar: transparent optical-quality calcite",
                                            "Manganoan calcite: manganese-bearing calcite",
                                            "Magnesian calcite: calcite containing magnesium substituted for calcium",
                                            "Ferroan calcite: iron-bearing calcite"
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-kinds-q01",
                                                "text": "Which of these kinds and varieties hold for the sense of calcite this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-identifiers",
                                        "name": "Identifiers and schemes",
                                        "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                                        "evidence": [
                                            {
                                                "scheme": "Chemical formula",
                                                "value_or_pattern": "CaCO₃",
                                                "note": "Composition alone does not distinguish calcite from the calcium carbonate polymorphs aragonite and vaterite."
                                            },
                                            {
                                                "scheme": "CAS Registry Number",
                                                "value_or_pattern": "471-34-1",
                                                "note": "Identifies calcium carbonate generally; it does not by itself establish the calcite crystal phase."
                                            },
                                            {
                                                "scheme": "Hermann-Mauguin space-group notation",
                                                "value_or_pattern": "R-3c",
                                                "note": "The conventional space group of calcite under ambient conditions."
                                            }
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-identifiers-q01",
                                                "text": "Which of these identifiers and schemes hold for the sense of calcite this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-real-world-use",
                                        "name": "Real-world use",
                                        "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                                        "evidence": [
                                            "Calcite-rich limestone supplies calcium carbonate for lime and cement production.",
                                            "Ground calcite serves as a filler or pigment in paper, paints, plastics and rubber.",
                                            "Suitable calcite-rich materials neutralize acidic soils and waters.",
                                            "Optical-quality calcite is used in polarizing prisms and other optical components.",
                                            "Calcite-rich marble and limestone are used as building and decorative stone."
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-real-world-use-q01",
                                                "text": "Which of these real-world use hold for the sense of calcite this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-measurements",
                                        "name": "Typical measurements",
                                        "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                                        "evidence": [
                                            {
                                                "quantity": "Mohs hardness",
                                                "typical_range": "3",
                                                "unit": "Mohs scale"
                                            },
                                            {
                                                "quantity": "Density of relatively pure calcite at ambient conditions",
                                                "typical_range": "Approximately 2.71",
                                                "unit": "g/cm³"
                                            },
                                            {
                                                "quantity": "Ordinary refractive index near the sodium D wavelength",
                                                "typical_range": "Approximately 1.658",
                                                "unit": "dimensionless"
                                            },
                                            {
                                                "quantity": "Extraordinary refractive index near the sodium D wavelength",
                                                "typical_range": "Approximately 1.486",
                                                "unit": "dimensionless"
                                            }
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-measurements-q01",
                                                "text": "Which of these typical measurements hold for the sense of calcite this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-failure-modes-and-hazards",
                                        "name": "Failure modes and hazards",
                                        "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                                        "evidence": [
                                            "Calcite dissolves in acidic solutions, releasing carbon dioxide and causing etching or loss of material.",
                                            "Its relatively low hardness makes exposed surfaces susceptible to scratching and abrasive wear.",
                                            "Perfect rhombohedral cleavage makes crystals susceptible to splitting under mechanical stress.",
                                            "Cutting, grinding and handling powders can generate inhalable dust; associated minerals can add hazards not intrinsic to pure calcite.",
                                            "Strong heating decomposes calcium carbonate into calcium oxide and carbon dioxide; the resulting calcium oxide has different handling hazards."
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-failure-modes-and-hazards-q01",
                                                "text": "Which of these failure modes and hazards hold for the sense of calcite this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-regional-variation",
                                        "name": "Regional variation",
                                        "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                                        "evidence": [
                                            "Deposits differ in magnesium, iron and manganese substitution and in associated minerals, affecting colour, purity and industrial suitability."
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-regional-variation-q01",
                                                "text": "Which of these regional variation hold for the sense of calcite this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-neighbours",
                                        "name": "Neighbouring kinds and how to tell them apart",
                                        "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                                        "evidence": [
                                            {
                                                "name": "Calcium carbonate",
                                                "difference": "Calcium carbonate names the chemical composition; calcite specifies one crystalline mineral phase."
                                            },
                                            {
                                                "name": "Aragonite",
                                                "difference": "Aragonite has the same ideal composition but an orthorhombic crystal structure, distinguishable by diffraction."
                                            },
                                            {
                                                "name": "Vaterite",
                                                "difference": "Vaterite is another calcium carbonate polymorph with a different diffraction pattern and lower stability under ordinary surface conditions."
                                            },
                                            {
                                                "name": "Dolomite",
                                                "difference": "Dolomite has the ideal composition CaMg(CO₃)₂ and an ordered calcium-magnesium structure rather than calcite's CaCO₃ structure."
                                            },
                                            {
                                                "name": "Limestone",
                                                "difference": "Limestone is a sedimentary rock commonly dominated by calcite; it is an aggregate that may contain other minerals."
                                            },
                                            {
                                                "name": "Marble",
                                                "difference": "Marble is a metamorphic rock commonly composed of recrystallized calcite or dolomite, rather than an individual mineral species."
                                            }
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-neighbours-q01",
                                                "text": "Which of these neighbouring kinds and how to tell them apart hold for the sense of calcite this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    }
                ]
            },
            "openQuestions": [
                "Does an existing Vercy world model already cover calcite, and which neighbouring models own calcium carbonate, its other polymorphs and calcite-bearing rocks?",
                "Which authoritative identifiers distinguish calcite specifically from calcium carbonate records that do not specify a polymorph?",
                "Which reference values and test conditions should be adopted for density, optical constants, dissolution behaviour and thermal decomposition?",
                "What analytical criteria distinguish substituted calcite from intergrown carbonate phases for the material classes this model must support?",
                "Which application standards, safety classifications and jurisdiction-specific exposure limits must be researched for the intended calcite grades and forms?"
            ],
            "statistics": {
                "bundles": 6,
                "layers": 11,
                "findings": 18,
                "questions": 28
            }
        },
        "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 calcite, record what state it is in, and decide what may be done with it.",
            "whatItIs": "Enable an AI agent to recognise calcite, assess the condition and suitability of a specimen or material lot, and choose appropriate handling, testing and use.",
            "characteristics": {
                "substance": "material",
                "origin": "natural",
                "agency": "inert",
                "mobility": "varies"
            },
            "whatYouCanDoWithIt": [
                "observed and measured",
                "consumed or used up"
            ],
            "distinguishingFeatures": [
                "Names folded into this entry, which a task may need to split apart again: nailhead spar, glendonite, plumboan calcite, aphrite, onyx marble, cobaltocalcite, manganoan calcite, Iceland spar.",
                "8 finer distinctions are held as aliases rather than separate entries, because telling them apart needs a task that asks for it.",
                "Described in 74 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 calcite, 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": [
                {
                    "relation": "covers",
                    "note": "Finer kinds folded into this entry because telling them apart needs a task that asks for it. Each is a model waiting to be split out when one does.",
                    "targets": [
                        "nailhead spar",
                        "glendonite",
                        "plumboan calcite",
                        "aphrite",
                        "onyx marble",
                        "cobaltocalcite",
                        "manganoan calcite",
                        "Iceland spar"
                    ]
                }
            ],
            "standing": "Described in 74 Wikipedia languages, which measures how widely it is written about rather than how important or how common it is. 8 finer distinctions are held inside this entry as names rather than as separate models.",
            "structure": {
                "bundles": [
                    {
                        "id": "identity-and-classification",
                        "name": "Identity, naming and classification",
                        "description": "How an agent tells one calcite from another, and a calcite 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 calcite, 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 calcite, 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 calcite 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 calcite, 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 calcite, 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 calcite 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 calcite 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 calcite, 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 calcite, 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 calcite 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 calcite from the things most often confused with it.",
                                        "questions": [
                                            {
                                                "id": "distinguishing-features-q01",
                                                "text": "What identifies and describes what distinguishes a calcite, 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 calcite, 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 calcite 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 calcite 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 calcite, 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 calcite, 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 calcite 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 calcite is built from and which parts are replaceable.",
                                        "questions": [
                                            {
                                                "id": "parts-and-materials-q01",
                                                "text": "What identifies and describes the composition of a calcite, 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 calcite, 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 calcite 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 calcite is judged and by whom.",
                                        "questions": [
                                            {
                                                "id": "condition-assessment-q01",
                                                "text": "What identifies and describes the condition of a calcite, 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 calcite, 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 calcite 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 calcite 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 calcite is, and what that position is measured against.",
                                        "questions": [
                                            {
                                                "id": "position-and-frame-q01",
                                                "text": "What identifies and describes the location of a calcite, 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 calcite, 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 calcite 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 calcite 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 calcite, 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 calcite, 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 calcite 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 calcite 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 calcite between them.",
                                        "questions": [
                                            {
                                                "id": "stages-and-transitions-q01",
                                                "text": "What identifies and describes the lifecycle of a calcite, 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 calcite, 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 calcite 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 calcite, how often and by whom.",
                                "findings": [
                                    {
                                        "id": "observation-record",
                                        "name": "Observation record",
                                        "description": "How an observation of a calcite 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 calcite, 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 calcite, 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 calcite 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 calcite 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 calcite is for, and what it is used for anyway.",
                                "findings": [
                                    {
                                        "id": "function-and-purpose",
                                        "name": "Function, purpose and misuse",
                                        "description": "The function a calcite performs and the uses that fall outside it.",
                                        "questions": [
                                            {
                                                "id": "function-and-purpose-q01",
                                                "text": "What identifies and describes the use of a calcite, 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 calcite, 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 calcite 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 calcite.",
                                "findings": [
                                    {
                                        "id": "procedures-and-skills",
                                        "name": "Procedures, skills and required tools",
                                        "description": "What an agent needs before it can act on a calcite at all.",
                                        "questions": [
                                            {
                                                "id": "procedures-and-skills-q01",
                                                "text": "What identifies and describes handling a calcite, 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 calcite, 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 calcite 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 calcite there is and how fast it goes.",
                                        "questions": [
                                            {
                                                "id": "consumption-and-stock-q01",
                                                "text": "What identifies and describes the supply of a calcite, 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 calcite, 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 calcite 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 calcite 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 calcite 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 calcite 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 calcite 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 calcite, 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 calcite 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 calcite 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 calcite 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 calcite, 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 calcite 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 calcite and how confident it is.",
                                        "questions": [
                                            {
                                                "id": "claim-provenance-q01",
                                                "text": "What identifies and describes a claim about a calcite, 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 calcite, 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 calcite 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 calcite is retired without being erased.",
                                        "questions": [
                                            {
                                                "id": "validity-and-supersession-q01",
                                                "text": "What identifies and describes the validity of a claim about a calcite, 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 calcite, 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 calcite 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
            }
        }
    }
}