{ "model": { "rank": 5187, "code": "thing-q209569", "model_id": "vr.tr.hydrofluoric-acid", "name": "hydrofluoric acid", "purpose": "Enable an AI agent to recognise hydrofluoric acid, assess a particular solution's composition and condition, and determine which uses, handling decisions and escalations require verified evidence.", "family": "Thing Registry", "category": "Physical world and living systems", "status": "research-draft", "kind": "thing", "plane": "PHY", "domain": "PHY.MAT", "industry": "", "version": "", "url": "/models/thing/q209569/", "tier": 2, "score": 69, "payload": { "layer": "wikidata", "aliases": [], "aliasCount": 0, "merged": 0, "knownIn": 69, "facets": null, "markers": [], "lexicalClass": "", "senseRank": null, "alsoRegisteredAs": "vr.tr.hydrofluoric-acid", "source": { "dataset": "wikidata", "item": "Q209569", "url": "https://www.wikidata.org/wiki/Q209569", "license": "CC0 1.0" } }, "research": { "vercy": "1.0-draft", "publication": { "status": "research-draft", "adjudicationStatus": "unreviewed", "publishableCanonical": false, "generatedAt": "2026-09-09T21:51:31Z", "providers": [ "Codex" ], "breadth": "recalled by Codex without web access - no source was read", "missingProviders": [], "pass": 2, "cost": { "grok": { "seconds": 22.7, "error": "Reading additional input from stdin...\nOpenAI Codex v0.153.4\n--------\nworkdir: R:\\02_PROJECTS\\02_Meta_Models_Platforms\\Ver.cy\\current\\thing-registry-backlog\nmodel: gpt-6-astra\nprovider: openai\napproval: never\nsandbox: read-only\nreasoning effort: none\nreasoning summaries: none\nsession id: 01a08826-9a24-7371-9e19-d2d97cf7f401\n--------\nuser\nDescribe what is already known about one registered thing. Answer as JSON only, no prose around it.\n\nThing: hydrofluoric acid\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: 10", "usd": 0, "recall": true }, "codex": { "seconds": 65.2, "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: 01a08826-9a2e-7cb0-889e-3ec898f0d4c3\n--------\nuser\nYou are drafting a Vercy meta-model for one registered thing. Answer as JSON only, no prose around it.\n\nThing: hydrofluoric acid\nRegistry id: vr.tr.hydrofluoric-acid\nPlane / domain: PHY / PHY.MAT\nRegistry definition: (none recorded)\nNames folded into this entr" } } }, "metaModel": { "id": "THING-Q209569", "registryId": "vr.tr.hydrofluoric-acid", "name": "hydrofluoric acid", "version": "0.1.0-research.1", "entryKind": "thing", "family": "Thing Registry", "domain": [ "PHY.MAT" ], "status": "research-draft" }, "canonicalUrl": "https://ver.cy/models/thing/q209569/", "model": { "registry_id": "vr.tr.hydrofluoric-acid", "name": "hydrofluoric acid", "purpose": "Enable an AI agent to recognise hydrofluoric acid, assess a particular solution's composition and condition, and determine which uses, handling decisions and escalations require verified evidence.", "definition": "Hydrofluoric acid is an aqueous solution of hydrogen fluoride (HF), a weak acid in dilute water whose fluoride chemistry makes it highly toxic, corrosive, and capable of attacking silica.", "scope_statement": "This model owns hydrofluoric acid as an aqueous hydrogen fluoride material under registry entry vr.tr.hydrofluoric-acid in PHY / PHY.MAT, including concentration, grade, condition, compatibility and applicable safety constraints; the boundary with anhydrous hydrogen fluoride requires explicit identification.", "in_scope": [ "Aqueous hydrogen fluoride identity and its distinction from anhydrous hydrogen fluoride and other fluoride-containing solutions", "HF concentration, analytical basis, impurities and application-specific grade", "Solution properties and phase behaviour at stated composition, temperature and pressure", "Chemical compatibility, corrosivity and fluoride-related exposure hazards", "Lot-specific provenance, containment condition and applicable classification" ], "out_of_scope": [ "Anhydrous hydrogen fluoride as a separately characterised material", "Fluoride salts and fluorosilicic acid as distinct substances", "Formulated cleaning or etching products beyond their hydrofluoric-acid constituent", "Industrial manufacturing and etching processes as complete operational models", "Clinical diagnosis and treatment protocols for exposed people", "Facility-wide ventilation, emergency-response and waste-treatment system design" ], "distinguishing_features": [ "Identify an aqueous HF material from its composition and documentation; the formula HF alone does not distinguish hydrofluoric acid from anhydrous hydrogen fluoride.", "Distinguish HF content from total fluoride: a fluoride-containing solution is not automatically hydrofluoric acid.", "Distinguish hydrofluoric acid from fluorosilicic acid and mixed-acid formulations through constituent identity rather than an informal product name.", "Do not interpret its classification as a weak acid as evidence of low hazard; acid dissociation, corrosivity and fluoride-related toxicity are separate assessments.", "Treat concentration and grade as material-defining attributes when deciding whether two lots are interchangeable." ], "characteristics": [ { "name": "Material identity and identifier scope", "kind": "category", "unit_or_values": "Preferred name; verified CAS number, PubChem CID and EC number; whether each identifier denotes HF, an aqueous solution or a formulation", "why_it_matters": "Prevents an identifier for the molecular substance from being mistaken for a complete description of a solution." }, { "name": "HF concentration", "kind": "measurement", "unit_or_values": "Mass fraction as % w/w; other concentration units only with their basis and conversion conditions", "why_it_matters": "Concentration affects properties, hazards, compatibility and suitability for use." }, { "name": "Assay meaning and confidence", "kind": "category", "unit_or_values": "Nominal or measured; analytical method; HF assay, total acidity or total fluoride; uncertainty and analysis date", "why_it_matters": "These analytical quantities are not interchangeable in contaminated or mixed solutions." }, { "name": "Grade and impurity profile", "kind": "category", "unit_or_values": "Supplier grade specification; impurity identities and limits in mg/kg or µg/kg", "why_it_matters": "A grade label alone does not establish suitability for contamination-sensitive applications." }, { "name": "Temperature, pressure and physical state", "kind": "state", "unit_or_values": "Temperature in °C; pressure in kPa absolute; liquid, frozen or multiphase condition", "why_it_matters": "The observed state and applicable property data depend on environmental conditions and composition." }, { "name": "Composition-dependent physical properties", "kind": "measurement", "unit_or_values": "Density in kg/m³; freezing and boiling behaviour in °C; vapour pressure in kPa, each with concentration and measurement conditions", "why_it_matters": "Pure-HF constants cannot be assumed to describe an aqueous solution." }, { "name": "Contact-material compatibility", "kind": "relation", "unit_or_values": "Contact material and component; supported concentration, temperature and duration; compatible, incompatible or unresolved", "why_it_matters": "Container, seal and equipment suitability must be demonstrated for the actual service conditions." }, { "name": "Applicable hazard classification", "kind": "category", "unit_or_values": "Jurisdiction, classification framework, concentration basis, hazard categories and dated supporting document", "why_it_matters": "The solution's classification must be established from applicable evidence rather than copied from an unspecified HF record." }, { "name": "Airborne exposure criteria", "kind": "measurement", "unit_or_values": "ppm or mg/m³; measured species; averaging period or ceiling; jurisdiction and effective date", "why_it_matters": "Exposure measurements can only be compared with limits that match the species and time basis." }, { "name": "Lot and containment condition", "kind": "state", "unit_or_values": "Lot identifier; sealed, opened, compromised or quarantined; inspection and review dates", "why_it_matters": "A valid chemical identity does not establish that a particular container remains fit for use." } ], "affordances": [ "Resolve whether a record describes hydrofluoric acid, anhydrous hydrogen fluoride or a formulated mixture.", "Compare a lot's measured concentration and impurity limits with a specified application requirement.", "Select property evidence that matches the solution's concentration and operating conditions.", "Screen proposed contact materials against documented compatibility limits.", "Determine whether identity, condition and safety evidence are sufficient to release a lot for an already authorised use.", "Flag compromised containment, suspected exposure or unresolved composition for specialist handling." ] }, "sources": [], "structure": { "bundles": [ { "id": "aqueous-hf-identity", "name": "Aqueous HF identity", "description": "Establish what the material is and how its identifiers relate to its actual composition.", "rationale": "Hydrofluoric acid records can conflate aqueous solutions, anhydrous HF and fluoride-containing formulations.", "layers": [ { "id": "substance-and-solution-boundary", "name": "Substance and solution boundary", "description": "Separate the aqueous material from adjacent chemical identities.", "findings": [ { "id": "water-and-hf-identity", "name": "Water and HF identity", "description": "Record evidence that the material is aqueous HF and identify additional intentional constituents.", "questions": [ { "text": "What compositional evidence establishes that this material is aqueous hydrogen fluoride?", "kind": "definition", "id": "water-and-hf-identity-q01" }, { "text": "Do additional constituents make this a formulated product or mixed acid requiring a neighbouring model?", "kind": "boundary", "id": "water-and-hf-identity-q02" } ] } ] }, { "id": "identifier-and-lot-traceability", "name": "Identifier and lot traceability", "description": "Connect chemical identifiers to supplier documentation and the particular lot.", "findings": [ { "id": "identifier-denotation", "name": "Identifier denotation", "description": "Preserve what each identifier actually denotes instead of treating all database records as equivalent.", "questions": [ { "text": "Which verified CAS, PubChem and EC records apply, and does each describe HF generally or this aqueous material specifically?", "kind": "provenance", "id": "identifier-denotation-q01" }, { "text": "Which supplier record, safety data sheet revision and certificate of analysis identify this lot?", "kind": "provenance", "id": "identifier-denotation-q02" } ] } ] } ] }, { "id": "concentration-and-grade", "name": "Concentration and grade", "description": "Characterise HF content and impurities sufficiently to judge material equivalence and application suitability.", "rationale": "Solutions sharing the name hydrofluoric acid can differ materially in concentration, contamination and allowable use.", "layers": [ { "id": "concentration-evidence", "name": "Concentration evidence", "description": "Make the concentration basis, assay meaning and uncertainty explicit.", "findings": [ { "id": "hf-assay-basis", "name": "HF assay basis", "description": "Distinguish measured HF concentration from nominal concentration, total acidity and total fluoride.", "questions": [ { "text": "What is the HF concentration, in which units and on what mass or volume basis?", "kind": "measurement", "id": "hf-assay-basis-q01" }, { "text": "What analytical method supports that value, and could other acids or fluoride species affect its interpretation?", "kind": "measurement", "id": "hf-assay-basis-q02" } ] } ] }, { "id": "purity-and-use-qualification", "name": "Purity and use qualification", "description": "Relate a documented impurity profile to the intended use.", "findings": [ { "id": "grade-supported-by-limits", "name": "Grade supported by limits", "description": "Represent grade through verifiable acceptance limits rather than a commercial label alone.", "questions": [ { "text": "Which limits apply to metals, silicon-containing impurities, other acids and particles, and which were measured for this lot?", "kind": "measurement", "id": "grade-supported-by-limits-q01" }, { "text": "Does this evidence satisfy the intended application's specification, or is further qualification required?", "kind": "action", "id": "grade-supported-by-limits-q02" } ] } ] } ] }, { "id": "solution-state-and-behaviour", "name": "Solution state and behaviour", "description": "Connect physical and chemical behaviour to the actual aqueous composition and conditions.", "rationale": "An isolated molecular formula or a single reference constant cannot describe all hydrofluoric acid solutions.", "layers": [ { "id": "phase-and-volatility", "name": "Phase and volatility", "description": "Capture concentration-dependent physical properties and their limits of applicability.", "findings": [ { "id": "condition-matched-properties", "name": "Condition-matched properties", "description": "Require the composition, temperature and pressure basis for density, phase-transition and vapour data.", "questions": [ { "text": "What density, freezing and boiling data apply to this HF concentration at the stated pressure?", "kind": "measurement", "id": "condition-matched-properties-q01" }, { "text": "What evidence describes vapour pressure and vapour composition over the relevant temperature range?", "kind": "measurement", "id": "condition-matched-properties-q02" } ] } ] }, { "id": "acidity-and-fluoride-speciation", "name": "Acidity and fluoride speciation", "description": "Separate acid behaviour from analytical fluoride content and practical hazard.", "findings": [ { "id": "acidity-is-not-hazard-ranking", "name": "Acidity is not a hazard ranking", "description": "Prevent pH or weak-acid terminology from substituting for composition and hazard assessment.", "questions": [ { "text": "Which acidity or speciation description is supported for this concentration, and what assumptions limit it?", "kind": "definition", "id": "acidity-is-not-hazard-ranking-q01" }, { "text": "If pH is reported, is the method suitable for this matrix, and what decisions can that result actually support?", "kind": "measurement", "id": "acidity-is-not-hazard-ranking-q02" } ] } ] } ] }, { "id": "contact-and-containment", "name": "Contact and containment", "description": "Assess material compatibility and the condition of the barriers containing the acid.", "rationale": "Hydrofluoric acid requires specific compatibility evidence, including for glass, metals, polymers and seals.", "layers": [ { "id": "chemical-contact-compatibility", "name": "Chemical contact compatibility", "description": "Evaluate each wetted component under its actual service conditions.", "findings": [ { "id": "component-specific-compatibility", "name": "Component-specific compatibility", "description": "Record documented compatibility limits and reaction hazards for proposed contact materials.", "questions": [ { "text": "What evidence supports each container, seal, transfer component and sensor material at this concentration and temperature?", "kind": "provenance", "id": "component-specific-compatibility-q01" }, { "text": "Could contact with glass, silicate-bearing material or a particular metal cause attack, contamination or hazardous gas generation?", "kind": "boundary", "id": "component-specific-compatibility-q02" } ] } ] }, { "id": "containment-condition-and-change", "name": "Containment condition and change", "description": "Track whether storage and handling history have invalidated the material's assessed condition.", "findings": [ { "id": "lot-condition-review", "name": "Lot condition review", "description": "Connect container integrity, opening history and possible contamination with release or quarantine decisions.", "questions": [ { "text": "What inspection and storage records establish container integrity and the absence of suspected contamination or concentration change?", "kind": "provenance", "id": "lot-condition-review-q01" }, { "text": "Which observed changes require quarantine, reassay or specialist inspection before further use?", "kind": "action", "id": "lot-condition-review-q02" } ] } ] } ] }, { "id": "exposure-and-authorised-disposition", "name": "Exposure and authorised disposition", "description": "Link solution-specific hazards to applicable controls, escalation and disposition requirements.", "rationale": "Hydrofluoric acid's corrosive and systemic fluoride hazards require assessment beyond an ordinary acid label.", "layers": [ { "id": "exposure-hazard-evidence", "name": "Exposure hazard evidence", "description": "Record supported exposure routes, classifications and monitoring criteria.", "findings": [ { "id": "solution-specific-hazard-assessment", "name": "Solution-specific hazard assessment", "description": "Keep corrosive injury and systemic fluoride toxicity visible without treating symptom severity as a reliable exposure measure.", "questions": [ { "text": "Which current hazard classifications apply to this concentration and jurisdiction, and what documents support them?", "kind": "provenance", "id": "solution-specific-hazard-assessment-q01" }, { "text": "Which airborne HF or fluoride limits apply, with what units, sampling basis and averaging periods?", "kind": "measurement", "id": "solution-specific-hazard-assessment-q02" }, { "text": "Which approved emergency procedure must be invoked for suspected exposure, including when immediate symptoms are absent?", "kind": "action", "id": "solution-specific-hazard-assessment-q03" } ] } ] }, { "id": "use-transfer-and-waste-status", "name": "Use, transfer and waste status", "description": "Determine whether the identified material may enter a proposed authorised activity or disposition route.", "findings": [ { "id": "evidence-for-disposition", "name": "Evidence for disposition", "description": "Connect material composition and condition to documented use, transport and waste requirements.", "questions": [ { "text": "What verified composition and classification determine the applicable transport description and packaging requirements?", "kind": "boundary", "id": "evidence-for-disposition-q01" }, { "text": "Do the receiving operation and its approved controls explicitly cover this concentration, grade and quantity?", "kind": "action", "id": "evidence-for-disposition-q02" }, { "text": "If the acid is spent or contaminated, which constituents and applicable waste rules determine its authorised disposition?", "kind": "action", "id": "evidence-for-disposition-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 a recall-based description; no sources were consulted.", "Melting point, boiling point, density, and vapour pressure require a specified HF concentration; anhydrous HF constants should not be assigned to aqueous hydrofluoric acid.", "Exact hazard categories, transport identifiers, and exposure limits should be checked for the concentration and jurisdiction; weak-acid behaviour does not imply low hazard." ], "questions": [ { "id": "evidence-confidence-notes-q01", "text": "Which of these check these first hold for the sense of hydrofluoric acid 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": [ "Dilute aqueous hydrofluoric acid", "Concentrated aqueous hydrofluoric acid", "Technical-grade hydrofluoric acid", "Reagent-grade hydrofluoric acid", "Electronic-grade hydrofluoric acid" ], "questions": [ { "id": "evidence-kinds-q01", "text": "Which of these kinds and varieties hold for the sense of hydrofluoric acid 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": "7664-39-3", "note": "Identifies hydrogen fluoride; aqueous products also require a concentration specification." }, { "scheme": "EC number", "value_or_pattern": "231-634-8", "note": "Substance identifier for hydrogen fluoride." }, { "scheme": "Chemical formula", "value_or_pattern": "HF(aq)", "note": "Denotes hydrogen fluoride dissolved in water; it does not specify concentration." } ], "questions": [ { "id": "evidence-identifiers-q01", "text": "Which of these identifiers and schemes hold for the sense of hydrofluoric acid 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 hazard communication framework; classification of solutions depends on composition and concentration.", "European Union REACH and CLP regulations govern relevant chemical registration, classification, labelling, and packaging obligations.", "United States OSHA Hazard Communication Standard governs workplace hazard communication.", "United Nations Recommendations on the Transport of Dangerous Goods distinguish hydrofluoric acid transport entries by concentration." ], "questions": [ { "id": "evidence-standards-and-regulation-q01", "text": "Which of these standards and regulation hold for the sense of hydrofluoric acid 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": [ "Etching and frosting glass through reaction with silica.", "Removing silicon dioxide in semiconductor manufacturing.", "Pickling and cleaning metals, including use in mixed-acid treatments.", "Laboratory dissolution of silicate materials." ], "questions": [ { "id": "evidence-real-world-use-q01", "text": "Which of these real-world use hold for the sense of hydrofluoric acid 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": "HF mass fraction in commonly supplied concentrated aqueous reagents", "typical_range": "Approximately 40-50; other commercial concentrations exist", "unit": "% by mass" }, { "quantity": "Acid dissociation constant expressed as pKa", "typical_range": "Approximately 3.2 in dilute aqueous solution near 25 °C", "unit": "dimensionless" } ], "questions": [ { "id": "evidence-measurements-q01", "text": "Which of these typical measurements hold for the sense of hydrofluoric acid 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": [ "Skin contact can cause deep tissue injury and systemic fluoride poisoning; pain may be delayed, particularly with dilute solutions.", "Fluoride can disrupt calcium and magnesium balance, potentially causing life-threatening cardiac effects.", "Inhalation of vapour or mist can cause severe respiratory injury.", "Eye exposure can cause severe damage and loss of vision.", "Attack on glass and other incompatible materials can cause containment failure; reactions with some metals can release flammable hydrogen." ], "questions": [ { "id": "evidence-failure-modes-and-hazards-q01", "text": "Which of these failure modes and hazards hold for the sense of hydrofluoric acid 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": [ "GHS implementation, occupational exposure limits, and workplace requirements differ between jurisdictions.", "Transport classification and packaging requirements depend on solution concentration and the applicable transport rules." ], "questions": [ { "id": "evidence-regional-variation-q01", "text": "Which of these regional variation hold for the sense of hydrofluoric acid 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": "Hydrogen fluoride", "difference": "Hydrogen fluoride names the compound HF in any relevant state; hydrofluoric acid specifically denotes its aqueous solution." }, { "name": "Anhydrous hydrogen fluoride", "difference": "Anhydrous hydrogen fluoride contains little water and is distinct from an aqueous acid solution, although commercial terminology sometimes blurs the distinction." }, { "name": "Hydrochloric acid", "difference": "Hydrochloric acid contains dissolved hydrogen chloride rather than hydrogen fluoride and lacks HF's characteristic fluoride-driven attack on silica." }, { "name": "Buffered oxide etch", "difference": "Buffered oxide etch is a formulated mixture, commonly containing hydrofluoric acid and ammonium fluoride, rather than hydrofluoric acid alone." } ], "questions": [ { "id": "evidence-neighbours-q01", "text": "Which of these neighbouring kinds and how to tell them apart hold for the sense of hydrofluoric acid this model covers, and on what evidence?", "kind": "provenance" } ] } ] } ] } ] }, "openQuestions": [ "Does the registry intend hydrofluoric acid strictly as aqueous HF, and does an existing Vercy model already own this concept or its anhydrous neighbour?", "Which authoritative CAS, PubChem and EC records best represent the aqueous-material scope without conflating it with anhydrous HF or commercial formulations?", "Which validated sources provide concentration-dependent density, freezing, boiling and vapour-composition data across the intended operating range?", "Which grade specifications, impurity limits and component-compatibility evidence are required for the actual applications this model must support?", "Which jurisdictions and concentration ranges must be covered by current hazard classifications, exposure limits, transport requirements and waste rules?" ], "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 hydrofluoric acid, record what state it is in, and decide what may be done with it.", "whatItIs": "Enable an AI agent to recognise hydrofluoric acid, assess a particular solution's composition and condition, and determine which uses, handling decisions and escalations require verified evidence.", "characteristics": { "substance": "material", "origin": "natural", "agency": "inert", "mobility": "varies" }, "whatYouCanDoWithIt": [ "observed and measured", "consumed or used up" ], "distinguishingFeatures": [ "Described in 69 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 hydrofluoric acid, 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 69 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 hydrofluoric acid from another, and a hydrofluoric acid 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 hydrofluoric acid, 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 hydrofluoric acid, 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 hydrofluoric acid 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 hydrofluoric acid, 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 hydrofluoric acid, 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 hydrofluoric acid 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 hydrofluoric acid 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 hydrofluoric acid, 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 hydrofluoric acid, 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 hydrofluoric acid 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 hydrofluoric acid from the things most often confused with it.", "questions": [ { "id": "distinguishing-features-q01", "text": "What identifies and describes what distinguishes a hydrofluoric acid, 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 hydrofluoric acid, 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 hydrofluoric acid 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 hydrofluoric acid 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 hydrofluoric acid, 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 hydrofluoric acid, 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 hydrofluoric acid 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 hydrofluoric acid is built from and which parts are replaceable.", "questions": [ { "id": "parts-and-materials-q01", "text": "What identifies and describes the composition of a hydrofluoric acid, 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 hydrofluoric acid, 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 hydrofluoric acid 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 hydrofluoric acid is judged and by whom.", "questions": [ { "id": "condition-assessment-q01", "text": "What identifies and describes the condition of a hydrofluoric acid, 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 hydrofluoric acid, 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 hydrofluoric acid 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 hydrofluoric acid 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 hydrofluoric acid is, and what that position is measured against.", "questions": [ { "id": "position-and-frame-q01", "text": "What identifies and describes the location of a hydrofluoric acid, 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 hydrofluoric acid, 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 hydrofluoric acid 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 hydrofluoric acid 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 hydrofluoric acid, 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 hydrofluoric acid, 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 hydrofluoric acid 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 hydrofluoric acid 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 hydrofluoric acid between them.", "questions": [ { "id": "stages-and-transitions-q01", "text": "What identifies and describes the lifecycle of a hydrofluoric acid, 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 hydrofluoric acid, 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 hydrofluoric acid 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 hydrofluoric acid, how often and by whom.", "findings": [ { "id": "observation-record", "name": "Observation record", "description": "How an observation of a hydrofluoric acid 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 hydrofluoric acid, 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 hydrofluoric acid, 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 hydrofluoric acid 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 hydrofluoric acid 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 hydrofluoric acid is for, and what it is used for anyway.", "findings": [ { "id": "function-and-purpose", "name": "Function, purpose and misuse", "description": "The function a hydrofluoric acid performs and the uses that fall outside it.", "questions": [ { "id": "function-and-purpose-q01", "text": "What identifies and describes the use of a hydrofluoric acid, 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 hydrofluoric acid, 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 hydrofluoric acid 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 hydrofluoric acid.", "findings": [ { "id": "procedures-and-skills", "name": "Procedures, skills and required tools", "description": "What an agent needs before it can act on a hydrofluoric acid at all.", "questions": [ { "id": "procedures-and-skills-q01", "text": "What identifies and describes handling a hydrofluoric acid, 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 hydrofluoric acid, 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 hydrofluoric acid 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 hydrofluoric acid there is and how fast it goes.", "questions": [ { "id": "consumption-and-stock-q01", "text": "What identifies and describes the supply of a hydrofluoric acid, 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 hydrofluoric acid, 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 hydrofluoric acid 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 hydrofluoric acid 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 hydrofluoric acid 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 hydrofluoric acid 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 hydrofluoric acid 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 hydrofluoric acid, 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 hydrofluoric acid 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 hydrofluoric acid 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 hydrofluoric acid 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 hydrofluoric acid, 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 hydrofluoric acid 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 hydrofluoric acid and how confident it is.", "questions": [ { "id": "claim-provenance-q01", "text": "What identifies and describes a claim about a hydrofluoric acid, 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 hydrofluoric acid, 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 hydrofluoric acid 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 hydrofluoric acid is retired without being erased.", "questions": [ { "id": "validity-and-supersession-q01", "text": "What identifies and describes the validity of a claim about a hydrofluoric acid, 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 hydrofluoric acid, 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 hydrofluoric acid 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 } } } }