{ "model": { "rank": 4595, "code": "thing-q146368", "model_id": "vr.tr.polyvinyl-chloride", "name": "polyvinyl chloride", "purpose": "Enable an agent to recognise polyvinyl chloride, evaluate the condition and suitability of a specific resin or compound, and determine what processing, use or recovery actions its evidence supports.", "family": "Thing Registry", "category": "Physical world and living systems", "status": "research-draft", "kind": "thing", "plane": "PHY", "domain": "PHY.MAT", "industry": "", "version": "", "url": "/models/thing/q146368/", "tier": 2, "score": 74, "payload": { "layer": "wikidata", "aliases": [], "aliasCount": 0, "merged": 0, "knownIn": 74, "facets": null, "markers": [], "lexicalClass": "", "senseRank": null, "alsoRegisteredAs": null, "source": { "dataset": "wikidata", "item": "Q146368", "url": "https://www.wikidata.org/wiki/Q146368", "license": "CC0 1.0" } }, "research": { "vercy": "1.0-draft", "publication": { "status": "research-draft", "adjudicationStatus": "unreviewed", "publishableCanonical": false, "generatedAt": "2026-09-09T20:34:58Z", "providers": [ "Codex" ], "breadth": "recalled by Codex without web access - no source was read", "missingProviders": [], "pass": 2, "cost": { "grok": { "seconds": 22.8, "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: 01a087e0-7e9d-7772-947f-73377c658c5e\n--------\nuser\nDescribe what is already known about one registered thing. Answer as JSON only, no prose around it.\n\nThing: polyvinyl chloride\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: 1", "usd": 0, "recall": true }, "codex": { "seconds": 67.4, "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: 01a087e0-7eaa-71c3-ae1b-56a32c818d4f\n--------\nuser\nYou are drafting a Vercy meta-model for one registered thing. Answer as JSON only, no prose around it.\n\nThing: polyvinyl chloride\nRegistry id: vr.tr.polyvinyl-chloride\nPlane / domain: PHY / PHY.MAT\nRegistry definition: (none recorded)\nNames folded into this en" } } }, "metaModel": { "id": "THING-Q146368", "registryId": "vr.tr.polyvinyl-chloride", "name": "polyvinyl chloride", "version": "0.1.0-research.1", "entryKind": "thing", "family": "Thing Registry", "domain": [ "PHY.MAT" ], "status": "research-draft" }, "canonicalUrl": "https://ver.cy/models/thing/q146368/", "model": { "registry_id": "vr.tr.polyvinyl-chloride", "name": "polyvinyl chloride", "purpose": "Enable an agent to recognise polyvinyl chloride, evaluate the condition and suitability of a specific resin or compound, and determine what processing, use or recovery actions its evidence supports.", "definition": "Polyvinyl chloride (PVC) is a predominantly amorphous thermoplastic polymer made from vinyl chloride, with repeating units -CH₂-CHCl-, whose practical properties depend strongly on molecular characteristics and compounding additives.", "scope_statement": "This model owns polyvinyl chloride (PVC) under registry id vr.tr.polyvinyl-chloride in PHY / PHY.MAT, covering resin identity, formulation, grade, measured behaviour and material condition; it distinguishes the polymer from vinyl chloride monomer, related polymers and finished products.", "in_scope": [ "PVC polymer identity, molecular characteristics and resin grade", "Unplasticised and plasticised formulations, including additives and fillers", "Material properties measured under stated conditions", "Processing history, degradation and service condition", "Composition-dependent hazards, use restrictions and recovery suitability" ], "out_of_scope": [ "Vinyl chloride monomer as a separately manufactured or handled substance", "Production plants and polymerisation process engineering", "Finished pipe, cable, flooring, packaging or medical-device design and certification", "Chlorinated PVC and vinyl chloride copolymers as independently identified materials", "Waste-management facilities and jurisdiction-wide regulatory systems" ], "distinguishing_features": [ "Identify the vinyl chloride homopolymer repeat structure, -CH2-CHCl-, through traceable documentation or suitable analytical evidence; the label 'vinyl' alone is insufficient.", "Distinguish polymeric PVC from vinyl chloride monomer, recording residual monomer as a constituent rather than treating it as the material identity.", "Check for post-chlorination or deliberately incorporated comonomers before accepting a material as PVC rather than chlorinated PVC or a vinyl chloride copolymer.", "Distinguish PVC from other chlorine-containing polymers using polymer-specific evidence; chlorine detection alone does not establish PVC identity.", "Separate resin identity from formulation: flexible and rigid PVC can share the same base polymer while differing substantially in plasticiser content and performance." ], "characteristics": [ { "name": "Polymer identity and identifier evidence", "kind": "category", "unit_or_values": "Declared polymer name; verified CAS, EC or database identifiers where applicable; analytical identification method", "why_it_matters": "Prevents identifiers for monomer, copolymers or compounds from being assigned indiscriminately to PVC." }, { "name": "Resin molecular grade", "kind": "measurement", "unit_or_values": "K-value with method; molecular-mass averages in g/mol and distribution where measured", "why_it_matters": "Supports comparison of processing behaviour and mechanical performance without assuming grades are interchangeable." }, { "name": "Formulation class", "kind": "category", "unit_or_values": "Unplasticised, plasticised, other documented formulation or unknown", "why_it_matters": "Separates materially different behaviour within the same polymer identity." }, { "name": "Constituent inventory", "kind": "measurement", "unit_or_values": "Identified constituents in mass % or parts per hundred resin, with basis and uncertainty", "why_it_matters": "Plasticisers, stabilisers, fillers and modifiers affect properties, permitted uses and recycling compatibility." }, { "name": "Residual vinyl chloride", "kind": "measurement", "unit_or_values": "mg/kg with analytical method, detection limit and sampling date", "why_it_matters": "Makes residual-monomer assessment specific to the material lot and intended use." }, { "name": "Physical form", "kind": "category", "unit_or_values": "Powder, granules, pellets, paste, regrind or other documented form", "why_it_matters": "Determines relevant handling, sampling and feeding conditions." }, { "name": "Thermal response", "kind": "measurement", "unit_or_values": "Glass-transition, softening and thermal-stability results in °C or min, with method and conditions", "why_it_matters": "Supports processing and service decisions without inventing a universal melting or boiling point." }, { "name": "Mechanical response", "kind": "measurement", "unit_or_values": "Tensile strength and modulus in MPa; elongation in %; hardness with scale; temperature and conditioning", "why_it_matters": "Shows whether the specific formulation retains the stiffness, flexibility or toughness required." }, { "name": "Degradation condition", "kind": "state", "unit_or_values": "Unassessed, acceptable against stated criteria, degraded or indeterminate; supporting observations and tests", "why_it_matters": "Connects discoloration, embrittlement, plasticiser loss and other evidence to justified actions." }, { "name": "Use-specific compliance evidence", "kind": "relation", "unit_or_values": "Links to formulation or lot declarations, test reports and applicable jurisdiction, use and date", "why_it_matters": "Prevents a general PVC designation from being mistaken for approval for a particular application." }, { "name": "Recovered-material provenance", "kind": "relation", "unit_or_values": "Source streams, prior uses, recycled mass fraction, sorting evidence and contamination reports", "why_it_matters": "Supports decisions about legacy additives, mixing and suitability for another processing cycle." } ], "affordances": [ "Verify whether a supplied material belongs to the PVC entry or requires another polymer model.", "Compare resin and compound grades against application-specific property requirements.", "Select a documented processing window using formulation and thermal-stability evidence.", "Request targeted testing when residual monomer, additive identity or degradation is uncertain.", "Assess whether a proposed use is supported by current, formulation-specific evidence.", "Route recovered PVC to a compatible reuse, recycling or disposal pathway using composition and provenance." ] }, "sources": [], "structure": { "bundles": [ { "id": "polymer-identity-and-grade", "name": "Polymer identity and grade", "description": "Establishes what the base polymer is and which resin grade is represented.", "rationale": "PVC naming can obscure distinctions between monomer, homopolymer, copolymer and post-chlorinated material.", "layers": [ { "id": "chemical-boundary", "name": "Chemical boundary", "description": "Separates PVC identity from related chemical identities and commercial shorthand.", "findings": [ { "id": "pvc-identity-evidence", "name": "PVC identity evidence", "description": "Record the evidence establishing vinyl chloride homopolymer identity and any ambiguity in the supplied designation.", "questions": [ { "text": "What documentation or analytical result establishes that the base polymer is PVC?", "kind": "definition", "id": "pvc-identity-evidence-q01" }, { "text": "Does evidence indicate post-chlorination, copolymerisation or a polymer blend that changes the identity boundary?", "kind": "boundary", "id": "pvc-identity-evidence-q02" } ] } ] }, { "id": "resin-grade", "name": "Resin grade", "description": "Captures molecular and particle characteristics relevant to the supplied resin.", "findings": [ { "id": "grade-comparability", "name": "Grade comparability", "description": "Describe the resin grade using supplier provenance and comparable measurements.", "questions": [ { "text": "Which producer, grade designation and lot identify the resin before compounding?", "kind": "provenance", "id": "grade-comparability-q01" }, { "text": "Which K-value, molecular-mass or particle-characterisation results are available, and under which methods?", "kind": "measurement", "id": "grade-comparability-q02" } ] } ] } ] }, { "id": "formulation-and-constituents", "name": "Formulation and constituents", "description": "Describes the material added to PVC resin and the resulting compound identity.", "rationale": "The polymer name alone does not explain PVC flexibility, stability, constituent migration or grade suitability.", "layers": [ { "id": "plasticisation-and-modification", "name": "Plasticisation and modification", "description": "Records intentional constituents that change PVC behaviour.", "findings": [ { "id": "compound-composition", "name": "Compound composition", "description": "Capture plasticisers, stabilisers, fillers, pigments and modifiers with explicit concentration bases.", "questions": [ { "text": "Is this unplasticised or plasticised PVC, and which plasticisers and loadings support that designation?", "kind": "definition", "id": "compound-composition-q01" }, { "text": "Which stabilisers, fillers and modifiers are present, at what concentrations, and which constituents remain undisclosed?", "kind": "measurement", "id": "compound-composition-q02" } ] } ] }, { "id": "residuals-and-contamination", "name": "Residuals and contamination", "description": "Separates intended formulation ingredients from residual monomer and unwanted material.", "findings": [ { "id": "constituent-confidence", "name": "Constituent confidence", "description": "Record lot-specific evidence for residual vinyl chloride and contaminants relevant to use or recovery.", "questions": [ { "text": "What residual vinyl chloride concentration was measured, with what sampling method and detection limit?", "kind": "measurement", "id": "constituent-confidence-q01" }, { "text": "Which contaminants or legacy additives require investigation because of the material's supply or recovery history?", "kind": "provenance", "id": "constituent-confidence-q02" } ] } ] } ] }, { "id": "processing-and-performance", "name": "Processing and performance", "description": "Connects formulation-specific thermal and mechanical evidence to processing and service decisions.", "rationale": "PVC processing requires adequate fusion while limiting degradation, and its service properties vary with formulation and conditions.", "layers": [ { "id": "thermal-processing-window", "name": "Thermal processing window", "description": "Captures evidence for fusion, flow and thermal stability under a stated processing route.", "findings": [ { "id": "fusion-and-stability", "name": "Fusion and stability", "description": "Record the temperature, time and shear conditions supported for the particular PVC compound.", "questions": [ { "text": "What fusion, rheology and thermal-stability tests support a processing window for this grade?", "kind": "measurement", "id": "fusion-and-stability-q01" }, { "text": "Which temperature, residence-time and shear limits should govern processing or reprocessing?", "kind": "action", "id": "fusion-and-stability-q02" } ] } ] }, { "id": "service-property-envelope", "name": "Service property envelope", "description": "Relates measured performance to intended temperature, loading and contact conditions.", "findings": [ { "id": "conditioned-performance", "name": "Conditioned performance", "description": "Represent mechanical, thermal and contact-resistance results with their test conditions rather than as universal PVC constants.", "questions": [ { "text": "What stiffness, tensile, impact or hardness results characterise this formulation at the intended service conditions?", "kind": "measurement", "id": "conditioned-performance-q01" }, { "text": "What evidence supports compatibility with the proposed chemicals, temperature range and sustained loading?", "kind": "action", "id": "conditioned-performance-q02" } ] } ] } ] }, { "id": "condition-and-exposure", "name": "Condition and exposure", "description": "Tracks deterioration and the exposure scenarios associated with handling, service and overheating.", "rationale": "PVC condition and exposure concerns depend on additives, physical form and thermal or environmental history.", "layers": [ { "id": "ageing-and-degradation", "name": "Ageing and degradation", "description": "Captures changes caused by heat, light, chemical contact and constituent loss.", "findings": [ { "id": "degradation-assessment", "name": "Degradation assessment", "description": "Link observed changes to corroborating evidence and explicit acceptance criteria.", "questions": [ { "text": "What heat, ultraviolet exposure or chemical-contact history accompanies discoloration, cracking or changes in flexibility?", "kind": "provenance", "id": "degradation-assessment-q01" }, { "text": "Which tests distinguish plasticiser loss, polymer degradation and surface contamination, and do results meet the intended-use criteria?", "kind": "measurement", "id": "degradation-assessment-q02" } ] } ] }, { "id": "scenario-specific-exposure", "name": "Scenario-specific exposure", "description": "Separates routine material handling from additive migration and thermal-decomposition scenarios.", "findings": [ { "id": "exposure-controls", "name": "Exposure controls", "description": "Associate relevant constituents and emissions with documented assessments and handling requirements.", "questions": [ { "text": "Which current safety data and measurements address dust, residual monomer or additive release for this supplied form?", "kind": "provenance", "id": "exposure-controls-q01" }, { "text": "What documented controls apply to the proposed operation, including hydrogen chloride release if thermal decomposition occurs?", "kind": "action", "id": "exposure-controls-q02" } ] } ] } ] }, { "id": "use-eligibility-and-recovery", "name": "Use eligibility and recovery", "description": "Links the specific PVC material to supported uses and composition-compatible recovery routes.", "rationale": "Neither a PVC label nor a previous application establishes suitability for a new use or recycling stream.", "layers": [ { "id": "application-evidence", "name": "Application evidence", "description": "Captures the scope and currency of declarations and tests without taking ownership of finished-product certification.", "findings": [ { "id": "supported-use-boundary", "name": "Supported use boundary", "description": "Record which formulation, jurisdiction and contact conditions each compliance claim actually covers.", "questions": [ { "text": "Which dated declarations or test reports support the proposed use of this exact formulation or lot?", "kind": "provenance", "id": "supported-use-boundary-q01" }, { "text": "Which requirements still depend on the finished article, such as migration, fire performance or mechanical certification?", "kind": "boundary", "id": "supported-use-boundary-q02" } ] } ] }, { "id": "recovery-compatibility", "name": "Recovery compatibility", "description": "Assesses sorting, additive history and retained material quality for a proposed recovery destination.", "findings": [ { "id": "recovered-pvc-routing", "name": "Recovered PVC routing", "description": "Connect source-stream evidence and measured condition to the receiving process's acceptance criteria.", "questions": [ { "text": "What prior uses, rigid or flexible fractions, non-PVC contamination and processing history are known for this recovered stream?", "kind": "provenance", "id": "recovered-pvc-routing-q01" }, { "text": "Does the receiving process accept its formulation, legacy additives and degradation state, and what testing or separation is still needed?", "kind": "action", "id": "recovered-pvc-routing-q02" } ] } ] } ] }, { "id": "evidence-and-external-alignment", "name": "Evidence and external alignment", "description": "What the world already says about this thing, gathered so the model can be checked against it.", "rationale": "A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.", "layers": [ { "id": "reported-evidence", "name": "Reported evidence", "description": "Findings from the breadth pass, kept separate from the structural claims.", "findings": [ { "id": "evidence-confidence-notes", "name": "Check these first", "description": "Recalled without web access and unsourced; every item is a lead to verify.", "evidence": [ "Values are recalled representative ranges, not grade specifications; fillers, plasticizers, orientation and test conditions can substantially change them.", "PVC has no single useful sharp melting or normal boiling point: it is predominantly amorphous and thermally degrades, so grade-specific thermal data should be checked.", "Verify applicable standard editions and product-specific requirements; hazard classifications and exposure limits for vinyl chloride or additives must not be assigned automatically to PVC resin." ], "questions": [ { "id": "evidence-confidence-notes-q01", "text": "Which of these check these first hold for the sense of polyvinyl chloride 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": [ "Unplasticized PVC (PVC-U)", "Plasticized or flexible PVC (PVC-P)", "Suspension-polymerized PVC resin", "Emulsion-polymerized PVC paste resin", "Oriented PVC (PVC-O)", "Cellular or foamed PVC" ], "questions": [ { "id": "evidence-kinds-q01", "text": "Which of these kinds and varieties hold for the sense of polyvinyl chloride 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": "9002-86-2", "note": "Identifies polyvinyl chloride; formulated compounds also contain separately identified additives." }, { "scheme": "ISO 1043-1 polymer abbreviation", "value_or_pattern": "PVC", "note": "Standard abbreviated term for polyvinyl chloride." }, { "scheme": "Resin identification code", "value_or_pattern": "3", "note": "Identifies the PVC resin family; does not establish local recyclability." } ], "questions": [ { "id": "evidence-identifiers-q01", "text": "Which of these identifiers and schemes hold for the sense of polyvinyl chloride 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": [ "ISO 1043-1, issued by the International Organization for Standardization, specifies basic polymer symbols and abbreviated terms.", "ISO 1452 series, issued by the International Organization for Standardization, addresses PVC-U piping systems for water supply and pressure drainage and sewerage.", "ASTM D1784, issued by ASTM International, classifies rigid PVC and chlorinated PVC compounds." ], "questions": [ { "id": "evidence-standards-and-regulation-q01", "text": "Which of these standards and regulation hold for the sense of polyvinyl chloride 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": [ "Pressure pipes, drainage pipes and fittings", "Window profiles, siding and other building profiles", "Electrical cable insulation and sheathing", "Flooring, coated fabrics and flexible films", "Medical tubing and fluid bags made from suitable formulated grades" ], "questions": [ { "id": "evidence-real-world-use-q01", "text": "Which of these real-world use hold for the sense of polyvinyl chloride 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": "Density of typical unfilled rigid compounds", "typical_range": "1.35-1.45", "unit": "g/cm³" }, { "quantity": "Glass-transition temperature of unplasticized PVC", "typical_range": "75-85", "unit": "°C" }, { "quantity": "Tensile strength of typical rigid compounds", "typical_range": "40-60", "unit": "MPa" } ], "questions": [ { "id": "evidence-measurements-q01", "text": "Which of these typical measurements hold for the sense of polyvinyl chloride 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": [ "Excessive heating causes dehydrochlorination, discoloration and hydrogen chloride release; processing requires thermal stabilization.", "Fires involving PVC can produce corrosive hydrogen chloride, carbon monoxide and smoke.", "Sustained loads cause creep; elevated temperatures reduce stiffness and pressure-bearing capability.", "Ultraviolet exposure and weathering can cause discoloration and embrittlement, depending on stabilization and formulation.", "Plasticizers and other additives can migrate or be extracted; residual vinyl chloride requires control because the monomer is carcinogenic." ], "questions": [ { "id": "evidence-failure-modes-and-hazards-q01", "text": "Which of these failure modes and hazards hold for the sense of polyvinyl chloride 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": [ "Flexible PVC is often called vinyl in commercial usage, while rigid PVC is commonly called uPVC in some markets.", "Acceptance in recycling streams varies with local infrastructure, product form and additive composition." ], "questions": [ { "id": "evidence-regional-variation-q01", "text": "Which of these regional variation hold for the sense of polyvinyl chloride 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": "Vinyl chloride", "difference": "The small-molecule monomer CH₂=CHCl, rather than the polymer made from it." }, { "name": "Chlorinated polyvinyl chloride", "difference": "CPVC undergoes additional chlorination after polymerization and generally tolerates higher service temperatures." }, { "name": "Polyvinylidene chloride", "difference": "PVDC has repeating units -CH₂-CCl₂-, containing two chlorine atoms per repeat rather than one." }, { "name": "Polyethylene", "difference": "Its repeating units contain only carbon and hydrogen, without PVC's pendant chlorine." } ], "questions": [ { "id": "evidence-neighbours-q01", "text": "Which of these neighbouring kinds and how to tell them apart hold for the sense of polyvinyl chloride this model covers, and on what evidence?", "kind": "provenance" } ] } ] } ] } ] }, "openQuestions": [ "Which authoritative identifiers and identity sources should anchor the PVC homopolymer entry, and how should commercial compound identifiers be linked?", "What evidence threshold should distinguish PVC compounds containing another polymer from blends that require a separate material identity?", "Which comparable test methods and grade-specific ranges should be adopted for K-value, fusion behaviour, thermal stability and service properties?", "Which current jurisdiction- and application-specific requirements govern residual vinyl chloride, additive restrictions, migration and occupational exposure?", "What minimum provenance and analytical evidence should establish recovery eligibility when legacy additives or prior processing cycles are unknown?" ], "statistics": { "bundles": 6, "layers": 11, "findings": 19, "questions": 29 } }, "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 polyvinyl chloride, record what state it is in, and decide what may be done with it.", "whatItIs": "Enable an agent to recognise polyvinyl chloride, evaluate the condition and suitability of a specific resin or compound, and determine what processing, use or recovery actions its evidence supports.", "characteristics": { "substance": "material", "origin": "natural", "agency": "inert", "mobility": "varies" }, "whatYouCanDoWithIt": [ "observed and measured", "consumed or used up" ], "distinguishingFeatures": [ "Described in 74 Wikipedia languages, which is a measure of how widely the thing is known, not of how important it is." ], "openQuestionsForResearch": [ "Which of the bundles below does a real task actually need, and which are ceremony?", "What does this thing have that the facets do not capture at all?", "Which neighbouring kind is most often confused with a polyvinyl chloride, 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 74 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 polyvinyl chloride from another, and a polyvinyl chloride 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 polyvinyl chloride, 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 polyvinyl chloride, 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 polyvinyl chloride 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 polyvinyl chloride, 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 polyvinyl chloride, 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 polyvinyl chloride 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 polyvinyl chloride 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 polyvinyl chloride, 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 polyvinyl chloride, 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 polyvinyl chloride 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 polyvinyl chloride from the things most often confused with it.", "questions": [ { "id": "distinguishing-features-q01", "text": "What identifies and describes what distinguishes a polyvinyl chloride, 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 polyvinyl chloride, 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 polyvinyl chloride 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 polyvinyl chloride 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 polyvinyl chloride, 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 polyvinyl chloride, 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 polyvinyl chloride 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 polyvinyl chloride is built from and which parts are replaceable.", "questions": [ { "id": "parts-and-materials-q01", "text": "What identifies and describes the composition of a polyvinyl chloride, 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 polyvinyl chloride, 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 polyvinyl chloride 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 polyvinyl chloride is judged and by whom.", "questions": [ { "id": "condition-assessment-q01", "text": "What identifies and describes the condition of a polyvinyl chloride, 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 polyvinyl chloride, 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 polyvinyl chloride 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 polyvinyl chloride 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 polyvinyl chloride is, and what that position is measured against.", "questions": [ { "id": "position-and-frame-q01", "text": "What identifies and describes the location of a polyvinyl chloride, 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 polyvinyl chloride, 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 polyvinyl chloride 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 polyvinyl chloride 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 polyvinyl chloride, 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 polyvinyl chloride, 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 polyvinyl chloride 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 polyvinyl chloride 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 polyvinyl chloride between them.", "questions": [ { "id": "stages-and-transitions-q01", "text": "What identifies and describes the lifecycle of a polyvinyl chloride, 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 polyvinyl chloride, 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 polyvinyl chloride 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 polyvinyl chloride, how often and by whom.", "findings": [ { "id": "observation-record", "name": "Observation record", "description": "How an observation of a polyvinyl chloride 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 polyvinyl chloride, 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 polyvinyl chloride, 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 polyvinyl chloride 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 polyvinyl chloride 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 polyvinyl chloride is for, and what it is used for anyway.", "findings": [ { "id": "function-and-purpose", "name": "Function, purpose and misuse", "description": "The function a polyvinyl chloride performs and the uses that fall outside it.", "questions": [ { "id": "function-and-purpose-q01", "text": "What identifies and describes the use of a polyvinyl chloride, 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 polyvinyl chloride, 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 polyvinyl chloride 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 polyvinyl chloride.", "findings": [ { "id": "procedures-and-skills", "name": "Procedures, skills and required tools", "description": "What an agent needs before it can act on a polyvinyl chloride at all.", "questions": [ { "id": "procedures-and-skills-q01", "text": "What identifies and describes handling a polyvinyl chloride, 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 polyvinyl chloride, 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 polyvinyl chloride 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 polyvinyl chloride there is and how fast it goes.", "questions": [ { "id": "consumption-and-stock-q01", "text": "What identifies and describes the supply of a polyvinyl chloride, 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 polyvinyl chloride, 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 polyvinyl chloride 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 polyvinyl chloride 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 polyvinyl chloride 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 polyvinyl chloride 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 polyvinyl chloride 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 polyvinyl chloride, 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 polyvinyl chloride 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 polyvinyl chloride 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 polyvinyl chloride 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 polyvinyl chloride, 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 polyvinyl chloride 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 polyvinyl chloride and how confident it is.", "questions": [ { "id": "claim-provenance-q01", "text": "What identifies and describes a claim about a polyvinyl chloride, 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 polyvinyl chloride, 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 polyvinyl chloride 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 polyvinyl chloride is retired without being erased.", "questions": [ { "id": "validity-and-supersession-q01", "text": "What identifies and describes the validity of a claim about a polyvinyl chloride, 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 polyvinyl chloride, 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 polyvinyl chloride 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 } } } }