{ "model": { "rank": 6672, "code": "thing-q207895", "model_id": "vr.tr.nitrogen-dioxide", "name": "nitrogen dioxide", "purpose": "Enable an agent to identify nitrogen dioxide, assess its composition and condition, and determine appropriate monitoring, handling and use constraints.", "family": "Thing Registry", "category": "Physical world and living systems", "status": "research-draft", "kind": "thing", "plane": "PHY", "domain": "PHY.MAT", "industry": "", "version": "", "url": "/models/thing/q207895/", "tier": 2, "score": 59, "payload": { "layer": "wikidata", "aliases": [], "aliasCount": 0, "merged": 0, "knownIn": 59, "facets": null, "markers": [], "lexicalClass": "", "senseRank": null, "alsoRegisteredAs": null, "source": { "dataset": "wikidata", "item": "Q207895", "url": "https://www.wikidata.org/wiki/Q207895", "license": "CC0 1.0" } }, "research": { "vercy": "1.0-draft", "publication": { "status": "research-draft", "adjudicationStatus": "unreviewed", "publishableCanonical": false, "generatedAt": "2026-09-09T23:15:13Z", "providers": [ "Codex" ], "breadth": "recalled by Codex without web access - no source was read", "missingProviders": [], "pass": 2, "cost": { "grok": { "seconds": 24.3, "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: 01a08873-65bf-75c1-8d76-226e6c86770d\n--------\nuser\nDescribe what is already known about one registered thing. Answer as JSON only, no prose around it.\n\nThing: nitrogen dioxide\nSense to describe: (none recorded)\nDomain code: PHY.MAT\nAlso known as: (none)\n\n\nContext for this batch of 1001 things:\n# Batch 007: 100", "usd": 0, "recall": true }, "codex": { "seconds": 54.2, "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: 01a08873-65be-7981-986a-75b8fc743ec9\n--------\nuser\nYou are drafting a Vercy meta-model for one registered thing. Answer as JSON only, no prose around it.\n\nThing: nitrogen dioxide\nRegistry id: vr.tr.nitrogen-dioxide\nPlane / domain: PHY / PHY.MAT\nRegistry definition: (none recorded)\nNames folded into this entry:" } } }, "metaModel": { "id": "THING-Q207895", "registryId": "vr.tr.nitrogen-dioxide", "name": "nitrogen dioxide", "version": "0.1.0-research.1", "entryKind": "thing", "family": "Thing Registry", "domain": [ "PHY.MAT" ], "status": "research-draft" }, "canonicalUrl": "https://ver.cy/models/thing/q207895/", "model": { "registry_id": "vr.tr.nitrogen-dioxide", "name": "nitrogen dioxide", "purpose": "Enable an agent to identify nitrogen dioxide, assess its composition and condition, and determine appropriate monitoring, handling and use constraints.", "definition": "Nitrogen dioxide (NO₂) is a reddish-brown, paramagnetic oxide of nitrogen that is a toxic, oxidizing gas at ordinary room temperature and exists in temperature-dependent equilibrium with its dimer, dinitrogen tetroxide (N₂O₄).", "scope_statement": "This model owns nitrogen dioxide (NO2) as a registered chemical substance, including its identity, condition-dependent relationship with dinitrogen tetroxide, sample composition, measurable properties, reactivity and exposure constraints.", "in_scope": [ "Chemical identity and authoritative substance identifiers", "NO2 content, impurities and equilibrium composition involving dinitrogen tetroxide", "Physical properties with temperature, pressure and composition conditions", "Chemical reactivity and compatibility with contact materials", "Concentration measurement, exposure assessment and applicable hazard classifications" ], "out_of_scope": [ "Nitrogen oxides as a collective substance family or aggregate emissions metric", "Dinitrogen tetroxide as a separately registered substance beyond its equilibrium relationship with NO2", "Combustion equipment and industrial processes that generate nitrogen dioxide", "Finished gas mixtures, cylinders and monitoring instruments as products", "Atmospheric systems and clinical conditions associated with nitrogen dioxide exposure" ], "distinguishing_features": [ "Chemical identification establishes NO2 rather than nitric oxide (NO), nitrous oxide (N2O) or a nonspecific NOx result.", "Composition reporting distinguishes molecular NO2 from N2O4 and records the conditions under which that distinction was measured or calculated.", "A substance record identifies nitrogen dioxide itself; a sample record additionally identifies its carrier gas, dilution and contaminants.", "The characteristic brown coloration can support identification, but concentration, path length and equilibrium composition prevent color alone from proving identity or safety." ], "characteristics": [ { "name": "Chemical identity", "kind": "category", "unit_or_values": "NO2; verified preferred name, CAS number, PubChem CID and EC number", "why_it_matters": "Connects the substance to authoritative records and prevents confusion with other nitrogen oxides." }, { "name": "NO2 concentration", "kind": "measurement", "unit_or_values": "mol/mol, ppm by volume or mg/m3; specify reporting basis and reference conditions", "why_it_matters": "Supports composition assessment, exposure comparison and interpretation of detector output." }, { "name": "NO2-N2O4 composition", "kind": "state", "unit_or_values": "Species fractions; measured or calculated; equilibrium established, assumed or unknown", "why_it_matters": "The balance between the species affects the meaning of purity, phase and property measurements." }, { "name": "Temperature and pressure", "kind": "measurement", "unit_or_values": "K or °C; Pa or kPa absolute", "why_it_matters": "Provides conditions needed to interpret phase, concentration conversions and NO2-N2O4 equilibrium." }, { "name": "Phase", "kind": "state", "unit_or_values": "Gas, liquid, solid or multiphase; specify composition and conditions", "why_it_matters": "Determines how inventory, release behavior and handling requirements should be assessed." }, { "name": "Purity and impurities", "kind": "measurement", "unit_or_values": "Species-specific mole or mass fractions, detection limits and analytical basis", "why_it_matters": "Distinguishes equilibrium-related N2O4 from unrelated contamination and establishes suitability for a use." }, { "name": "Physical property record", "kind": "measurement", "unit_or_values": "Melting and boiling behavior in °C or K; density in kg/m3; vapor pressure in Pa; all with composition and conditions", "why_it_matters": "Prevents condition-dependent values for an equilibrating system from being treated as universal NO2 constants." }, { "name": "Moisture and contact compatibility", "kind": "relation", "unit_or_values": "Water content; contacted material; compatibility evidence and operating conditions", "why_it_matters": "Moisture and chemical interactions can alter sample composition and compromise containment or measurement." }, { "name": "Hazard and exposure constraints", "kind": "relation", "unit_or_values": "Classification authority, jurisdiction, effective date, exposure value, unit and averaging period", "why_it_matters": "Makes restrictions traceable and prevents limits for different settings or durations from being interchanged." } ], "affordances": [ "Resolve a substance label against verified nitrogen dioxide identifiers.", "Assess whether a reported sample composition adequately distinguishes NO2, N2O4 and other nitrogen oxides.", "Interpret concentration and physical property measurements using their stated conditions and uncertainty.", "Compare an exposure measurement with a verified limit having the appropriate jurisdiction and averaging period.", "Evaluate proposed storage, sampling or transfer conditions against documented compatibility requirements.", "Flag missing evidence that prevents a handling or use decision." ] }, "sources": [], "structure": { "bundles": [ { "id": "identity-and-species-boundary", "name": "Identity and species boundary", "description": "Establishes what counts as nitrogen dioxide and how labels map to the registered substance.", "rationale": "NO2, N2O4 and aggregate NOx labels can refer to different chemical or reporting entities.", "layers": [ { "id": "authoritative-identity", "name": "Authoritative identity", "description": "Connects the registry entry to independently verifiable chemical identity records.", "findings": [ { "id": "identifier-agreement", "name": "Identifier agreement", "description": "Record identifiers and their source-specific definitions so that a matching name alone does not establish equivalence.", "questions": [ { "text": "Which authoritative records establish the CAS number, PubChem CID and EC number for nitrogen dioxide?", "kind": "provenance", "id": "identifier-agreement-q01" }, { "text": "Does each identifier describe NO2 specifically, or an associated commercial or equilibrium substance designation?", "kind": "boundary", "id": "identifier-agreement-q02" } ] } ] }, { "id": "neighbouring-nitrogen-oxides", "name": "Neighbouring nitrogen oxides", "description": "Separates chemical species identity from grouped measurements and product names.", "findings": [ { "id": "species-versus-reporting-label", "name": "Species versus reporting label", "description": "Preserve the distinction between molecular NO2, N2O4, other nitrogen oxides and results expressed as NO2 equivalents.", "questions": [ { "text": "Does the record identify NO2 molecules, total NOx or a quantity expressed as NO2 equivalents?", "kind": "definition", "id": "species-versus-reporting-label-q01" }, { "text": "Which properties belong to this substance and which belong to a containing mixture or the neighbouring N2O4 model?", "kind": "boundary", "id": "species-versus-reporting-label-q02" } ] } ] } ] }, { "id": "equilibrium-composition-and-phase", "name": "Equilibrium, composition and phase", "description": "Represents the condition-dependent composition and physical state of nitrogen dioxide samples.", "rationale": "Dimerization makes species fractions and property values dependent on the state and history of the sample.", "layers": [ { "id": "dimerization-state", "name": "Dimerization state", "description": "Records the NO2-N2O4 balance and the basis for assessing it.", "findings": [ { "id": "resolved-equilibrium-composition", "name": "Resolved equilibrium composition", "description": "Describe the balance represented by 2 NO2 ⇌ N2O4 without assuming that every sample has reached equilibrium.", "questions": [ { "text": "What temperature, absolute pressure and species fractions describe the sample at the point of interest?", "kind": "measurement", "id": "resolved-equilibrium-composition-q01" }, { "text": "Was equilibrium demonstrated, assumed from a validated model or left unresolved after a change in conditions?", "kind": "provenance", "id": "resolved-equilibrium-composition-q02" } ] } ] }, { "id": "phase-and-grade", "name": "Phase and grade", "description": "Qualifies physical properties and purity claims for the actual sample.", "findings": [ { "id": "conditioned-properties-and-purity", "name": "Conditioned properties and purity", "description": "Attach composition, conditions and analytical definitions to phase transitions, density, vapor pressure and grade.", "questions": [ { "text": "Which verified phase and property values apply at the recorded composition, temperature and pressure?", "kind": "measurement", "id": "conditioned-properties-and-purity-q01" }, { "text": "Does the purity specification distinguish N2O4 from impurities such as water, NO or carrier gases?", "kind": "definition", "id": "conditioned-properties-and-purity-q02" } ] } ] } ] }, { "id": "reactivity-and-containment", "name": "Reactivity and containment", "description": "Connects nitrogen dioxide chemistry to contact conditions, sample integrity and containment decisions.", "rationale": "Reactive contact and moisture can change both the substance being assessed and the suitability of its surroundings.", "layers": [ { "id": "reactive-contacts", "name": "Reactive contacts", "description": "Identifies relevant interactions with moisture and other contacted substances.", "findings": [ { "id": "moisture-and-reaction-context", "name": "Moisture and reaction context", "description": "Record water availability and other reactants rather than treating nitrogen dioxide as chemically unchanged across environments.", "questions": [ { "text": "What moisture level and co-present substances could change the sample during storage, transfer or measurement?", "kind": "measurement", "id": "moisture-and-reaction-context-q01" }, { "text": "Which documented reactions or incompatibilities constrain the proposed contact conditions?", "kind": "action", "id": "moisture-and-reaction-context-q02" } ] } ] }, { "id": "contact-materials", "name": "Contact materials", "description": "Evaluates whether wetted components remain suitable under the intended conditions.", "findings": [ { "id": "containment-compatibility-evidence", "name": "Containment compatibility evidence", "description": "Require evidence specific to material, NO2 composition, moisture, temperature and pressure before accepting containment suitability.", "questions": [ { "text": "What evidence supports the compatibility of each contacted vessel material, seal and sampling-line component?", "kind": "provenance", "id": "containment-compatibility-evidence-q01" }, { "text": "Which changes in moisture, temperature or composition require compatibility to be reassessed?", "kind": "action", "id": "containment-compatibility-evidence-q02" } ] } ] } ] }, { "id": "measurement-and-exposure-decisions", "name": "Measurement and exposure decisions", "description": "Makes nitrogen dioxide observations interpretable and links them to verified constraints.", "rationale": "A concentration reading supports a decision only when species selectivity, reporting conditions and the applicable exposure context are known.", "layers": [ { "id": "measurement-validity", "name": "Measurement validity", "description": "Qualifies readings by analytical method, sampling effects and reporting basis.", "findings": [ { "id": "selective-traceable-concentration", "name": "Selective, traceable concentration", "description": "Record whether the method directly measures NO2 or derives it, including interferences, calibration and sampling transformations.", "questions": [ { "text": "How does the method distinguish NO2 from NO, other reactive nitrogen compounds and relevant interferents?", "kind": "measurement", "id": "selective-traceable-concentration-q01" }, { "text": "What calibration, uncertainty, sampling losses and reference conditions accompany the reported concentration?", "kind": "provenance", "id": "selective-traceable-concentration-q02" } ] } ] }, { "id": "applicable-hazard-controls", "name": "Applicable hazard controls", "description": "Associates verified classifications and exposure limits with their intended setting.", "findings": [ { "id": "context-matched-constraints", "name": "Context-matched constraints", "description": "Keep occupational limits, ambient-air standards, emergency criteria and substance classifications distinct and versioned.", "questions": [ { "text": "Which current classification and exposure criteria apply to this jurisdiction, substance form and use setting?", "kind": "provenance", "id": "context-matched-constraints-q01" }, { "text": "Does the observation match the selected criterion's units, averaging period and sampling requirements closely enough to support the proposed action?", "kind": "action", "id": "context-matched-constraints-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 is recalled knowledge; no sources were consulted.", "Verify current legal limits, hazard categories and transport classifications for the relevant jurisdiction and supplied composition.", "Bulk phase-transition values describe an equilibrating NO₂/N₂O₄ system; composition, pressure, temperature, purity and moisture content must accompany precise property data." ], "questions": [ { "id": "evidence-confidence-notes-q01", "text": "Which of these check these first hold for the sense of nitrogen dioxide 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": "Molecular formula", "value_or_pattern": "NO₂", "note": "One nitrogen atom and two oxygen atoms per molecule." }, { "scheme": "CAS Registry Number", "value_or_pattern": "10102-44-0", "note": "Identifies nitrogen dioxide; dinitrogen tetroxide has a separate CAS identity." }, { "scheme": "PubChem CID", "value_or_pattern": "3030", "note": "Compound identifier for nitrogen dioxide." }, { "scheme": "EC number", "value_or_pattern": "233-272-6", "note": "European chemical inventory identifier." } ], "questions": [ { "id": "evidence-identifiers-q01", "text": "Which of these identifiers and schemes hold for the sense of nitrogen dioxide this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-standards-and-regulation", "name": "Standards and regulation", "description": "Recalled without web access and unsourced; every item is a lead to verify.", "evidence": [ "US Environmental Protection Agency: National Ambient Air Quality Standards for nitrogen dioxide.", "US Occupational Safety and Health Administration: workplace air-contaminant exposure limits for nitrogen dioxide.", "European Union: ambient air quality legislation establishes nitrogen dioxide limit values.", "European Union: the Classification, Labelling and Packaging Regulation governs substance hazard classification and labelling.", "United Nations: the Globally Harmonized System provides the framework for chemical hazard classification and communication." ], "questions": [ { "id": "evidence-standards-and-regulation-q01", "text": "Which of these standards and regulation hold for the sense of nitrogen dioxide 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": [ "Intermediate in nitric acid manufacture, where nitrogen oxides are absorbed and reacted with water and oxygen.", "Oxidizing or nitrating reagent in controlled chemical processes.", "Calibration gas component in certified mixtures for air-quality and emissions instruments.", "Measured as an indicator of combustion-related air pollution and a precursor involved in ozone and secondary particulate formation." ], "questions": [ { "id": "evidence-real-world-use-q01", "text": "Which of these real-world use hold for the sense of nitrogen dioxide 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": "Molar mass", "typical_range": "Approximately 46.01", "unit": "g/mol" }, { "quantity": "Normal boiling point of the equilibrium NO₂/N₂O₄ system", "typical_range": "Approximately 21 at 101.325 kPa", "unit": "°C" }, { "quantity": "Freezing point of the equilibrium NO₂/N₂O₄ system", "typical_range": "Approximately -11", "unit": "°C" } ], "questions": [ { "id": "evidence-measurements-q01", "text": "Which of these typical measurements hold for the sense of nitrogen dioxide 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": [ "Inhalation can cause severe respiratory injury, including delayed pulmonary edema.", "Oxidizing behavior can intensify combustion and cause dangerous reactions with combustible or reducing materials.", "Reaction with moisture produces acidic species, contributing to tissue injury and corrosion.", "Leaks can produce hazardous concentrations, particularly in poorly ventilated spaces; color and odor are not reliable exposure controls.", "Atmospheric reactions contribute to photochemical smog, nitric acid formation and nitrate particulate pollution." ], "questions": [ { "id": "evidence-failure-modes-and-hazards-q01", "text": "Which of these failure modes and hazards hold for the sense of nitrogen dioxide 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": [ "Ambient-air limits vary by jurisdiction in concentration, averaging period and permitted exceedances.", "Occupational exposure limits and their ceiling or time-weighted interpretation differ among national authorities.", "Hazard labelling and transport obligations depend on jurisdiction and whether the material is supplied as an equilibrium liquid or a dilute gas mixture." ], "questions": [ { "id": "evidence-regional-variation-q01", "text": "Which of these regional variation hold for the sense of nitrogen dioxide 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": "Nitric oxide", "difference": "NO has one oxygen atom per nitrogen atom and is readily oxidized to NO₂ in air." }, { "name": "Dinitrogen tetroxide", "difference": "N₂O₄ is the largely colorless, diamagnetic dimer; lower temperatures and higher pressures favor it relative to NO₂." }, { "name": "Nitrous oxide", "difference": "N₂O has two nitrogen atoms and one oxygen atom and has substantially different chemical and physiological properties." }, { "name": "Nitrogen oxides", "difference": "A collective category; in air-pollution reporting, NOₓ commonly denotes NO and NO₂ together rather than NO₂ alone." }, { "name": "Nitrite", "difference": "NO₂⁻ is a negatively charged ion found in salts and solutions, whereas nitrogen dioxide is a neutral radical molecule." } ], "questions": [ { "id": "evidence-neighbours-q01", "text": "Which of these neighbouring kinds and how to tell them apart hold for the sense of nitrogen dioxide this model covers, and on what evidence?", "kind": "provenance" } ] } ] } ] } ] }, "openQuestions": [ "Which authoritative identity records best resolve overlapping NO2 and N2O4 naming in commercial and regulatory sources?", "Which validated equilibrium and physical-property sources cover the intended temperature, pressure and dilution ranges?", "How should purity be represented when a supplier specification includes equilibrium-related N2O4 in its nitrogen dioxide assay?", "Which sampling methods and contact materials have documented performance under the intended moisture and concentration conditions?", "Which jurisdictions and use settings must be covered before current hazard classifications and exposure limits can be populated?" ], "statistics": { "bundles": 5, "layers": 9, "findings": 16, "questions": 24 } }, "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 nitrogen dioxide, record what state it is in, and decide what may be done with it.", "whatItIs": "Enable an agent to identify nitrogen dioxide, assess its composition and condition, and determine appropriate monitoring, handling and use constraints.", "characteristics": { "substance": "material", "origin": "natural", "agency": "inert", "mobility": "varies" }, "whatYouCanDoWithIt": [ "observed and measured", "consumed or used up" ], "distinguishingFeatures": [ "Described in 59 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 nitrogen dioxide, and on what evidence are they told apart?" ], "whatItIsMadeOf": "matter you can touch", "physicalCharacter": [ "Mobility varies between examples.", "Does nothing on its own; everything it does, something else did to it.", "These come from the domain this entry sits in rather than from the entry itself, so treat them as a first guess about the whole domain applied to one thing." ], "whatCanBeDoneWithIt": [ "observe it, measure it, record its state", "use it up, and then need more of it" ], "howItIsRecognised": [ "Not recognisable by sight in any reliable way. Appearance varies with grade, form and additives; identification is by label, by documentation, or by assay." ], "relatedModels": [], "standing": "Described in 59 Wikipedia languages, which measures how widely it is written about rather than how important or how common it is.", "structure": { "bundles": [ { "id": "identity-and-classification", "name": "Identity, naming and classification", "description": "How an agent tells one nitrogen dioxide from another, and a nitrogen dioxide 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 nitrogen dioxide, 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 nitrogen dioxide, 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 nitrogen dioxide 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 nitrogen dioxide, 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 nitrogen dioxide, 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 nitrogen dioxide 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 nitrogen dioxide 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 nitrogen dioxide, 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 nitrogen dioxide, 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 nitrogen dioxide 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 nitrogen dioxide from the things most often confused with it.", "questions": [ { "id": "distinguishing-features-q01", "text": "What identifies and describes what distinguishes a nitrogen dioxide, 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 nitrogen dioxide, 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 nitrogen dioxide 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 nitrogen dioxide 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 nitrogen dioxide, 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 nitrogen dioxide, 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 nitrogen dioxide 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 nitrogen dioxide is built from and which parts are replaceable.", "questions": [ { "id": "parts-and-materials-q01", "text": "What identifies and describes the composition of a nitrogen dioxide, 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 nitrogen dioxide, 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 nitrogen dioxide 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 nitrogen dioxide is judged and by whom.", "questions": [ { "id": "condition-assessment-q01", "text": "What identifies and describes the condition of a nitrogen dioxide, 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 nitrogen dioxide, 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 nitrogen dioxide 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 nitrogen dioxide 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 nitrogen dioxide is, and what that position is measured against.", "questions": [ { "id": "position-and-frame-q01", "text": "What identifies and describes the location of a nitrogen dioxide, 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 nitrogen dioxide, 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 nitrogen dioxide 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 nitrogen dioxide 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 nitrogen dioxide, 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 nitrogen dioxide, 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 nitrogen dioxide 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 nitrogen dioxide 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 nitrogen dioxide between them.", "questions": [ { "id": "stages-and-transitions-q01", "text": "What identifies and describes the lifecycle of a nitrogen dioxide, 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 nitrogen dioxide, 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 nitrogen dioxide 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 nitrogen dioxide, how often and by whom.", "findings": [ { "id": "observation-record", "name": "Observation record", "description": "How an observation of a nitrogen dioxide 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 nitrogen dioxide, 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 nitrogen dioxide, 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 nitrogen dioxide 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 nitrogen dioxide 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 nitrogen dioxide is for, and what it is used for anyway.", "findings": [ { "id": "function-and-purpose", "name": "Function, purpose and misuse", "description": "The function a nitrogen dioxide performs and the uses that fall outside it.", "questions": [ { "id": "function-and-purpose-q01", "text": "What identifies and describes the use of a nitrogen dioxide, 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 nitrogen dioxide, 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 nitrogen dioxide 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 nitrogen dioxide.", "findings": [ { "id": "procedures-and-skills", "name": "Procedures, skills and required tools", "description": "What an agent needs before it can act on a nitrogen dioxide at all.", "questions": [ { "id": "procedures-and-skills-q01", "text": "What identifies and describes handling a nitrogen dioxide, 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 nitrogen dioxide, 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 nitrogen dioxide 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 nitrogen dioxide there is and how fast it goes.", "questions": [ { "id": "consumption-and-stock-q01", "text": "What identifies and describes the supply of a nitrogen dioxide, 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 nitrogen dioxide, 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 nitrogen dioxide 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 nitrogen dioxide 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 nitrogen dioxide 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 nitrogen dioxide 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 nitrogen dioxide 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 nitrogen dioxide, 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 nitrogen dioxide 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 nitrogen dioxide 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 nitrogen dioxide 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 nitrogen dioxide, 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 nitrogen dioxide 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 nitrogen dioxide and how confident it is.", "questions": [ { "id": "claim-provenance-q01", "text": "What identifies and describes a claim about a nitrogen dioxide, 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 nitrogen dioxide, 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 nitrogen dioxide 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 nitrogen dioxide is retired without being erased.", "questions": [ { "id": "validity-and-supersession-q01", "text": "What identifies and describes the validity of a claim about a nitrogen dioxide, 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 nitrogen dioxide, 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 nitrogen dioxide 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 } } } }