{ "model": { "rank": 4682, "code": "thing-q26075", "model_id": "vr.tr.hydrogen-cyanide", "name": "hydrogen cyanide", "purpose": "Enable an AI agent to recognise hydrogen cyanide, assess its composition and physical state, and determine which handling or use decisions require verified evidence and authorised expertise.", "family": "Thing Registry", "category": "Physical world and living systems", "status": "research-draft", "kind": "thing", "plane": "PHY", "domain": "PHY.MAT", "industry": "", "version": "", "url": "/models/thing/q26075/", "tier": 2, "score": 73, "payload": { "layer": "wikidata", "aliases": [], "aliasCount": 0, "merged": 0, "knownIn": 73, "facets": null, "markers": [], "lexicalClass": "", "senseRank": null, "alsoRegisteredAs": "vr.tr.hydrogen-cyanide", "source": { "dataset": "wikidata", "item": "Q26075", "url": "https://www.wikidata.org/wiki/Q26075", "license": "CC0 1.0" } }, "research": { "vercy": "1.0-draft", "publication": { "status": "research-draft", "adjudicationStatus": "unreviewed", "publishableCanonical": false, "generatedAt": "2026-09-09T20:47:03Z", "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: 01a087eb-9573-7f03-8712-632f9071a0a1\n--------\nuser\nDescribe what is already known about one registered thing. Answer as JSON only, no prose around it.\n\nThing: hydrogen cyanide\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: 100", "usd": 0, "recall": true }, "codex": { "seconds": 65.4, "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: 01a087eb-9562-75b2-a0fc-c63337dc2510\n--------\nuser\nYou are drafting a Vercy meta-model for one registered thing. Answer as JSON only, no prose around it.\n\nThing: hydrogen cyanide\nRegistry id: vr.tr.hydrogen-cyanide\nPlane / domain: PHY / PHY.MAT\nRegistry definition: (none recorded)\nNames folded into this entry:" } } }, "metaModel": { "id": "THING-Q26075", "registryId": "vr.tr.hydrogen-cyanide", "name": "hydrogen cyanide", "version": "0.1.0-research.1", "entryKind": "thing", "family": "Thing Registry", "domain": [ "PHY.MAT" ], "status": "research-draft" }, "canonicalUrl": "https://ver.cy/models/thing/q26075/", "model": { "registry_id": "vr.tr.hydrogen-cyanide", "name": "hydrogen cyanide", "purpose": "Enable an AI agent to recognise hydrogen cyanide, assess its composition and physical state, and determine which handling or use decisions require verified evidence and authorised expertise.", "definition": "Hydrogen cyanide (HCN) is a highly toxic, volatile molecular compound with hydrogen-carbon-nitrogen connectivity that is a weak acid in water and is distinguished from cyanide ions and their salts.", "scope_statement": "This model owns hydrogen cyanide as the molecular substance HCN, including its identity, purity, condition-dependent state, reactivity, hazards and applicable controls; it extends the broader cyanide concept without duplicating models of cyanide salts, formulated products or production processes.", "in_scope": [ "Molecular identity and authoritative substance identifiers", "Purity, water content, stabilisation and distinctions between neat substance and solutions", "Physical phase and measured properties under stated conditions", "Chemical stability, compatibility and changes in molecular form", "Exposure evidence, hazard classifications and jurisdiction-specific controls" ], "out_of_scope": [ "The full cyanide family, including cyanide salts and coordination compounds", "Manufacturing routes, synthesis procedures and process optimisation", "Complete formulations and commercial products containing hydrogen cyanide", "Facility engineering and operating procedures", "Clinical diagnosis and treatment of cyanide poisoning" ], "distinguishing_features": [ "The molecular identity must resolve to HCN rather than the cyanide anion or a metal cyanide salt.", "Molecular connectivity must distinguish hydrogen cyanide from hydrogen isocyanide; an elemental formula alone is insufficient.", "An aqueous material must distinguish its hydrogen cyanide constituent from the solution as a whole and state the concentration basis.", "A material capable of releasing hydrogen cyanide is not automatically a sample of hydrogen cyanide.", "Gas-phase and liquid-phase records must be assessed against temperature, pressure and composition rather than treated as different substance identities." ], "characteristics": [ { "name": "Verified substance identity", "kind": "category", "unit_or_values": "Molecular formula, connectivity, preferred name and verified CAS, PubChem and EC identifiers", "why_it_matters": "Prevents substitution of cyanide-family records or records for a different molecular connectivity." }, { "name": "Material form", "kind": "category", "unit_or_values": "Neat substance; aqueous solution constituent; gas-mixture constituent; other characterised mixture", "why_it_matters": "Determines whether evidence applies to the substance or to a containing material." }, { "name": "Hydrogen cyanide content", "kind": "measurement", "unit_or_values": "Mass fraction, mole fraction, mg/L or other explicit concentration basis, with method and uncertainty", "why_it_matters": "Makes grades, analytical results and mixture assessments interpretable." }, { "name": "Water and impurity profile", "kind": "measurement", "unit_or_values": "Identified constituents with mass fractions or trace concentrations and detection limits", "why_it_matters": "Supports evaluation of property data, suitability and stability evidence." }, { "name": "Stabilisation status", "kind": "state", "unit_or_values": "Verified stabilised; verified unstabilised; unknown; stabiliser identity, concentration and verification date", "why_it_matters": "Connects stability claims to the actual material and its documented condition." }, { "name": "Physical state and conditions", "kind": "state", "unit_or_values": "Gas, liquid, solid or multiphase; temperature in °C or K and pressure in kPa", "why_it_matters": "Prevents phase and handling assumptions based on an unspecified ambient condition." }, { "name": "Phase-transition and volatility data", "kind": "measurement", "unit_or_values": "Melting and boiling temperatures with pressure; vapour pressure in kPa at a stated temperature", "why_it_matters": "Supports assessment of state changes and potential airborne presence." }, { "name": "Aqueous speciation evidence", "kind": "measurement", "unit_or_values": "pH, temperature, analytical species and applicable equilibrium data", "why_it_matters": "Distinguishes molecular HCN measurements from cyanide-ion and total-cyanide measurements." }, { "name": "Stability and compatibility assessment", "kind": "state", "unit_or_values": "Documented applicable conditions; evidence date; assessed, unresolved or outside documented conditions", "why_it_matters": "Prevents a generic substance record from being treated as proof that a particular sample is suitable for handling." }, { "name": "Exposure measurement", "kind": "measurement", "unit_or_values": "ppm or mg/m³, with sampling location, duration, method, detection limit and calibration status", "why_it_matters": "Makes airborne measurements comparable with correctly matched exposure criteria." }, { "name": "Applicable hazard and regulatory record", "kind": "relation", "unit_or_values": "Links to authoritative classifications, exposure limits, transport entries and site authorisations, each with jurisdiction and effective date", "why_it_matters": "Ensures decisions use controls applicable to the material form, location and intended activity." } ], "affordances": [ "Resolve a name or identifier to hydrogen cyanide and flag confusion with cyanide salts or hydrogen isocyanide.", "Assess whether analytical evidence adequately establishes composition and grade.", "Check whether physical-property evidence applies to the recorded temperature, pressure and material form.", "Compare documented exposure measurements with current, applicable limits using matching units and averaging periods.", "Identify missing stability, compatibility or authorisation evidence and route consequential decisions to qualified personnel." ] }, "sources": [], "structure": { "bundles": [ { "id": "hydrogen-cyanide-identity", "name": "Hydrogen cyanide identity", "description": "Establish the molecular substance and its relationship to broader cyanide records and containing materials.", "rationale": "Hydrogen cyanide needs a narrower identity than cyanide while retaining links to shared family concepts.", "layers": [ { "id": "molecular-and-regulatory-identity", "name": "Molecular and regulatory identity", "description": "Resolve names and identifiers against molecular connectivity.", "findings": [ { "id": "identity-resolution-evidence", "name": "Identity resolution evidence", "description": "Record evidence that identifiers and names refer to hydrogen cyanide with the intended connectivity and material scope.", "questions": [ { "text": "Which authoritative records establish the molecular connectivity and CAS, PubChem and EC identifiers for hydrogen cyanide?", "kind": "provenance", "id": "identity-resolution-evidence-q01" }, { "text": "Does each candidate record describe hydrogen cyanide, hydrogen isocyanide, a cyanide salt or a containing mixture?", "kind": "boundary", "id": "identity-resolution-evidence-q02" } ] } ] }, { "id": "cyanide-family-and-mixture-boundary", "name": "Cyanide family and mixture boundary", "description": "Keep shared cyanide concepts and solution identities at their appropriate scope.", "findings": [ { "id": "substance-versus-containing-material", "name": "Substance versus containing material", "description": "Represent hydrogen cyanide as a defined substance or constituent without assigning its identity to every cyanide-bearing material.", "questions": [ { "text": "Which concepts should be inherited or linked from the broader cyanide model, and which depend specifically on molecular HCN?", "kind": "boundary", "id": "substance-versus-containing-material-q01" }, { "text": "When a record uses the name hydrocyanic acid, what concentration and solution context does its source specify?", "kind": "definition", "id": "substance-versus-containing-material-q02" } ] } ] } ] }, { "id": "composition-and-speciation", "name": "Composition and speciation", "description": "Describe hydrogen cyanide content, analytical meaning and constituents that qualify a material's grade.", "rationale": "A nominal hydrogen cyanide label cannot establish purity, solution composition or which cyanide species an assay measured.", "layers": [ { "id": "grade-and-constituents", "name": "Grade and constituents", "description": "Characterise purity, water, impurities and declared stabilisation.", "findings": [ { "id": "sample-composition-evidence", "name": "Sample composition evidence", "description": "Attach composition claims to a specific sample or lot, analytical method and reporting basis.", "questions": [ { "text": "What hydrogen cyanide content and water content were measured, using which methods, units and uncertainties?", "kind": "measurement", "id": "sample-composition-evidence-q01" }, { "text": "Which impurities or stabilisers are documented for this lot, and how recently was their presence verified?", "kind": "provenance", "id": "sample-composition-evidence-q02" } ] } ] }, { "id": "aqueous-species-and-assay-meaning", "name": "Aqueous species and assay meaning", "description": "Distinguish molecular HCN from other cyanide species in analytical and equilibrium records.", "findings": [ { "id": "species-specific-interpretation", "name": "Species-specific interpretation", "description": "Require enough analytical and solution context to interpret a reported cyanide result.", "questions": [ { "text": "Does the reported assay quantify molecular hydrogen cyanide, free cyanide, total cyanide or another method-defined fraction?", "kind": "definition", "id": "species-specific-interpretation-q01" }, { "text": "What pH, temperature and matrix information are available to support interpretation of the aqueous species present?", "kind": "measurement", "id": "species-specific-interpretation-q02" } ] } ] } ] }, { "id": "phase-and-volatility", "name": "Phase and volatility", "description": "Relate hydrogen cyanide's observed state and tendency to enter the gas phase to documented conditions.", "rationale": "State and volatility evidence must be tied to temperature, pressure and composition before it can inform a decision.", "layers": [ { "id": "condition-dependent-phase", "name": "Condition-dependent phase", "description": "Connect phase observations with applicable transition data.", "findings": [ { "id": "phase-assignment", "name": "Phase assignment", "description": "Record the observed phase and the conditions needed to interpret it.", "questions": [ { "text": "What phase was observed, at what temperature and pressure, and for what composition?", "kind": "measurement", "id": "phase-assignment-q01" }, { "text": "Which verified melting and boiling data apply to this material, and what pressure and purity qualifications accompany them?", "kind": "provenance", "id": "phase-assignment-q02" } ] } ] }, { "id": "vapour-and-mixture-behaviour", "name": "Vapour and mixture behaviour", "description": "Separate pure-substance volatility data from gas mixtures and aqueous-system evidence.", "findings": [ { "id": "volatility-evidence-applicability", "name": "Volatility evidence applicability", "description": "Qualify vapour-pressure and partitioning information by the system it describes.", "questions": [ { "text": "What vapour-pressure or gas-liquid partitioning measurements are available at the relevant temperature and composition?", "kind": "measurement", "id": "volatility-evidence-applicability-q01" }, { "text": "Does the cited evidence describe neat hydrogen cyanide, an aqueous solution or a gas mixture, and is that scope applicable here?", "kind": "boundary", "id": "volatility-evidence-applicability-q02" } ] } ] } ] }, { "id": "stability-and-compatibility", "name": "Stability and compatibility", "description": "Track evidence concerning hydrogen cyanide stability, stabilisation and contact-material compatibility.", "rationale": "Identity and purity alone do not establish whether a material remains within its documented handling conditions.", "layers": [ { "id": "stability-and-material-history", "name": "Stability and material history", "description": "Relate stability assessments to the actual lot and its history.", "findings": [ { "id": "documented-stability-status", "name": "Documented stability status", "description": "Record source-backed stability qualifications and unresolved departures from them.", "questions": [ { "text": "What authoritative evidence addresses polymerisation, decomposition and the role of stabilisation for the supplied material?", "kind": "provenance", "id": "documented-stability-status-q01" }, { "text": "Does the recorded age, composition and storage history remain within the supplier's documented conditions, or require expert reassessment?", "kind": "action", "id": "documented-stability-status-q02" } ] } ] }, { "id": "contact-and-reaction-boundaries", "name": "Contact and reaction boundaries", "description": "Link contact-material and chemical compatibility claims to a defined application.", "findings": [ { "id": "compatibility-evidence", "name": "Compatibility evidence", "description": "Require applicable compatibility evidence before accepting a proposed contact or use.", "questions": [ { "text": "Which authoritative compatibility records cover the proposed contact materials and the hydrogen cyanide form involved?", "kind": "provenance", "id": "compatibility-evidence-q01" }, { "text": "What missing composition or condition information prevents a qualified reviewer from accepting the proposed use?", "kind": "action", "id": "compatibility-evidence-q02" } ] } ] } ] }, { "id": "hazards-exposure-and-controls", "name": "Hazards, exposure and controls", "description": "Connect hydrogen cyanide hazard evidence, exposure measurements and applicable authorisations.", "rationale": "Hazard labels and exposure criteria require material-specific and jurisdiction-specific interpretation.", "layers": [ { "id": "hazard-and-exposure-evidence", "name": "Hazard and exposure evidence", "description": "Record verified classifications and interpretable monitoring results.", "findings": [ { "id": "classification-and-monitoring", "name": "Classification and monitoring", "description": "Maintain hazard classifications and exposure evidence with their scope, date and measurement limitations.", "questions": [ { "text": "Which current authoritative classifications apply to this form and concentration of hydrogen cyanide, including acute toxicity and physical hazards?", "kind": "provenance", "id": "classification-and-monitoring-q01" }, { "text": "What monitoring method, calibration, sampling period and detection limit support each airborne hydrogen cyanide measurement?", "kind": "measurement", "id": "classification-and-monitoring-q02" }, { "text": "Which applicable exposure limits and skin notations must be considered, and do the measurement units and averaging periods match?", "kind": "boundary", "id": "classification-and-monitoring-q03" } ] } ] }, { "id": "authorised-activity-and-escalation", "name": "Authorised activity and escalation", "description": "Identify the controls and responsible roles governing a proposed activity.", "findings": [ { "id": "decision-authority", "name": "Decision authority", "description": "Link consequential actions to applicable transport, workplace and emergency requirements.", "questions": [ { "text": "Which jurisdiction-specific transport entry and workplace requirements apply to the material's form, concentration and proposed activity?", "kind": "boundary", "id": "decision-authority-q01" }, { "text": "What verified site authorisation and qualified review are required before the proposed activity may proceed?", "kind": "action", "id": "decision-authority-q02" }, { "text": "Which approved site emergency plan and responsible personnel govern escalation of a suspected release or exposure?", "kind": "action", "id": "decision-authority-q03" } ] } ] } ] }, { "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 recall-based information; no sources were consulted.", "Check current jurisdiction-specific hazard classifications, exposure limits and transport entries before regulatory use.", "Physical constants describe the pure substance under stated conditions; aqueous concentration, impurities and stabilizers affect material behavior." ], "questions": [ { "id": "evidence-confidence-notes-q01", "text": "Which of these check these first hold for the sense of hydrogen cyanide 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": [ "Anhydrous hydrogen cyanide", "Aqueous hydrogen cyanide, commonly called hydrocyanic acid" ], "questions": [ { "id": "evidence-kinds-q01", "text": "Which of these kinds and varieties hold for the sense of hydrogen cyanide 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": "CAS Registry Number", "value_or_pattern": "74-90-8", "note": "Identifies hydrogen cyanide; solution concentration and formulation require separate description." }, { "scheme": "PubChem CID", "value_or_pattern": "768", "note": "Compound identifier for hydrogen cyanide." }, { "scheme": "EC number", "value_or_pattern": "200-821-6", "note": "European chemical inventory identifier." }, { "scheme": "Molecular formula", "value_or_pattern": "HCN", "note": "Formula alone does not distinguish hydrogen cyanide from its connectivity isomer hydrogen isocyanide." } ], "questions": [ { "id": "evidence-identifiers-q01", "text": "Which of these identifiers and schemes hold for the sense of hydrogen cyanide 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": [ "United Nations Globally Harmonized System of Classification and Labelling of Chemicals provides the framework for communicating acute toxicity and flammability hazards.", "European Union CLP Regulation governs substance and mixture classification, labelling and packaging.", "United Nations Recommendations on the Transport of Dangerous Goods distinguish transport descriptions according to concentration and stabilization." ], "questions": [ { "id": "evidence-standards-and-regulation-q01", "text": "Which of these standards and regulation hold for the sense of hydrogen cyanide 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": [ "Industrial intermediate for adiponitrile used in nylon manufacture.", "Feedstock for acetone cyanohydrin in a route to methyl methacrylate.", "Manufacture of cyanide salts and other chemical intermediates.", "Historically used as a fumigant." ], "questions": [ { "id": "evidence-real-world-use-q01", "text": "Which of these real-world use hold for the sense of hydrogen cyanide 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": "27.03", "unit": "g/mol" }, { "quantity": "Melting point of pure substance", "typical_range": "Approximately -13.4", "unit": "°C" }, { "quantity": "Normal boiling point at 101.325 kPa", "typical_range": "Approximately 25.6", "unit": "°C" }, { "quantity": "Acid dissociation constant, pKa, in water near 25 °C", "typical_range": "Approximately 9.2", "unit": "dimensionless" } ], "questions": [ { "id": "evidence-measurements-q01", "text": "Which of these typical measurements hold for the sense of hydrogen cyanide 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": [ "Acute poisoning can follow inhalation, ingestion or skin absorption; cyanide inhibits mitochondrial cytochrome c oxidase and impairs cellular oxygen use.", "High volatility can rapidly create dangerous airborne concentrations.", "Highly flammable; vapor mixed with air can present a fire or explosion hazard.", "Uncontrolled polymerization can release heat and generate pressure, particularly when stabilization or storage conditions are inadequate.", "Its reported bitter-almond odor is an unreliable warning because detection varies between people." ], "questions": [ { "id": "evidence-failure-modes-and-hazards-q01", "text": "Which of these failure modes and hazards hold for the sense of hydrogen cyanide 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": [ "Occupational exposure limits, averaging periods and skin notations differ among jurisdictions and issuing bodies.", "GHS implementation and requirements for transport, storage and permitted uses vary by jurisdiction." ], "questions": [ { "id": "evidence-regional-variation-q01", "text": "Which of these regional variation hold for the sense of hydrogen cyanide 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": "cyanide", "difference": "Cyanide is the broader registry concept encompassing the CN− ion and related substances; hydrogen cyanide is the specific neutral HCN molecule." }, { "name": "hydrocyanic acid", "difference": "Usually denotes hydrogen cyanide dissolved in water; concentration and solution properties distinguish it from anhydrous HCN." }, { "name": "sodium cyanide", "difference": "An ionic salt containing Na+ and CN−, rather than the neutral molecular compound HCN." }, { "name": "hydrogen isocyanide", "difference": "Has H-N-C connectivity rather than hydrogen cyanide's H-C-N connectivity." } ], "questions": [ { "id": "evidence-neighbours-q01", "text": "Which of these neighbouring kinds and how to tell them apart hold for the sense of hydrogen cyanide this model covers, and on what evidence?", "kind": "provenance" } ] } ] } ] } ] }, "openQuestions": [ "Does an existing Vercy world model already own hydrogen cyanide, and which broader cyanide publication should this registry entry reference?", "Which authoritative identity records resolve identifiers and the naming boundary between hydrogen cyanide and hydrocyanic acid?", "Which reference datasets provide defensible physical constants and aqueous equilibrium data with conditions and uncertainties?", "What supplier-specific evidence is necessary to establish stabilisation, stability and compatibility for different grades and material forms?", "Which jurisdictions and intended activities determine the hazard classifications, exposure limits, transport entries and authorisations this model must support?" ], "statistics": { "bundles": 6, "layers": 11, "findings": 19, "questions": 31 } }, "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 hydrogen cyanide, record what state it is in, and decide what may be done with it.", "whatItIs": "Enable an AI agent to recognise hydrogen cyanide, assess its composition and physical state, and determine which handling or use decisions require verified evidence and authorised expertise.", "characteristics": { "substance": "material", "origin": "natural", "agency": "inert", "mobility": "varies" }, "whatYouCanDoWithIt": [ "observed and measured", "consumed or used up" ], "distinguishingFeatures": [ "Described in 73 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 hydrogen cyanide, 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 73 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 hydrogen cyanide from another, and a hydrogen cyanide 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 hydrogen cyanide, 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 hydrogen cyanide, 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 hydrogen cyanide 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 hydrogen cyanide, 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 hydrogen cyanide, 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 hydrogen cyanide 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 hydrogen cyanide 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 hydrogen cyanide, 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 hydrogen cyanide, 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 hydrogen cyanide 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 hydrogen cyanide from the things most often confused with it.", "questions": [ { "id": "distinguishing-features-q01", "text": "What identifies and describes what distinguishes a hydrogen cyanide, 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 hydrogen cyanide, 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 hydrogen cyanide 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 hydrogen cyanide 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 hydrogen cyanide, 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 hydrogen cyanide, 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 hydrogen cyanide 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 hydrogen cyanide is built from and which parts are replaceable.", "questions": [ { "id": "parts-and-materials-q01", "text": "What identifies and describes the composition of a hydrogen cyanide, 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 hydrogen cyanide, 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 hydrogen cyanide 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 hydrogen cyanide is judged and by whom.", "questions": [ { "id": "condition-assessment-q01", "text": "What identifies and describes the condition of a hydrogen cyanide, 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 hydrogen cyanide, 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 hydrogen cyanide 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 hydrogen cyanide 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 hydrogen cyanide is, and what that position is measured against.", "questions": [ { "id": "position-and-frame-q01", "text": "What identifies and describes the location of a hydrogen cyanide, 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 hydrogen cyanide, 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 hydrogen cyanide 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 hydrogen cyanide 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 hydrogen cyanide, 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 hydrogen cyanide, 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 hydrogen cyanide 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 hydrogen cyanide 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 hydrogen cyanide between them.", "questions": [ { "id": "stages-and-transitions-q01", "text": "What identifies and describes the lifecycle of a hydrogen cyanide, 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 hydrogen cyanide, 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 hydrogen cyanide 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 hydrogen cyanide, how often and by whom.", "findings": [ { "id": "observation-record", "name": "Observation record", "description": "How an observation of a hydrogen cyanide 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 hydrogen cyanide, 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 hydrogen cyanide, 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 hydrogen cyanide 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 hydrogen cyanide 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 hydrogen cyanide is for, and what it is used for anyway.", "findings": [ { "id": "function-and-purpose", "name": "Function, purpose and misuse", "description": "The function a hydrogen cyanide performs and the uses that fall outside it.", "questions": [ { "id": "function-and-purpose-q01", "text": "What identifies and describes the use of a hydrogen cyanide, 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 hydrogen cyanide, 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 hydrogen cyanide 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 hydrogen cyanide.", "findings": [ { "id": "procedures-and-skills", "name": "Procedures, skills and required tools", "description": "What an agent needs before it can act on a hydrogen cyanide at all.", "questions": [ { "id": "procedures-and-skills-q01", "text": "What identifies and describes handling a hydrogen cyanide, 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 hydrogen cyanide, 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 hydrogen cyanide 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 hydrogen cyanide there is and how fast it goes.", "questions": [ { "id": "consumption-and-stock-q01", "text": "What identifies and describes the supply of a hydrogen cyanide, 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 hydrogen cyanide, 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 hydrogen cyanide 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 hydrogen cyanide 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 hydrogen cyanide 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 hydrogen cyanide 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 hydrogen cyanide 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 hydrogen cyanide, 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 hydrogen cyanide 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 hydrogen cyanide 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 hydrogen cyanide 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 hydrogen cyanide, 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 hydrogen cyanide 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 hydrogen cyanide and how confident it is.", "questions": [ { "id": "claim-provenance-q01", "text": "What identifies and describes a claim about a hydrogen cyanide, 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 hydrogen cyanide, 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 hydrogen cyanide 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 hydrogen cyanide is retired without being erased.", "questions": [ { "id": "validity-and-supersession-q01", "text": "What identifies and describes the validity of a claim about a hydrogen cyanide, 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 hydrogen cyanide, 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 hydrogen cyanide 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 } } } }