{ "model": { "rank": 6891, "code": "thing-q190453", "model_id": "vr.tr.poisson-s-ratio", "name": "Poisson's ratio", "purpose": "Enable an agent to identify, interpret, compare and appropriately use Poisson's ratio as a measure of transverse deformation relative to axial deformation.", "family": "Thing Registry", "category": "Cross-cutting context", "status": "research-draft", "kind": "thing", "plane": "XCT", "domain": "XCT.QLT", "industry": "", "version": "", "url": "/models/thing/q190453/", "tier": 2, "score": 58, "payload": { "layer": "wikidata", "aliases": [], "aliasCount": 0, "merged": 0, "knownIn": 58, "facets": null, "markers": [], "lexicalClass": "", "senseRank": null, "alsoRegisteredAs": null, "source": { "dataset": "wikidata", "item": "Q190453", "url": "https://www.wikidata.org/wiki/Q190453", "license": "CC0 1.0" } }, "research": { "vercy": "1.0-draft", "publication": { "status": "research-draft", "adjudicationStatus": "unreviewed", "publishableCanonical": false, "generatedAt": "2026-09-09T23:43:16Z", "providers": [ "Codex" ], "breadth": "recalled by Codex without web access - no source was read", "missingProviders": [], "pass": 2, "cost": { "grok": { "seconds": 18.5, "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: 01a0888c-f76e-7e52-ba42-aeaabea57fdb\n--------\nuser\nDescribe what is already known about one registered thing. Answer as JSON only, no prose around it.\n\nThing: Poisson's ratio\nSense to describe: (none recorded)\nDomain code: XCT.QLT\nAlso known as: (none)\n\n\nContext for this batch of 1001 things:\n# Batch 007: 1001", "usd": 0, "recall": true }, "codex": { "seconds": 61.8, "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: 01a0888c-f77f-7581-8100-afed70b2ba2b\n--------\nuser\nYou are drafting a Vercy meta-model for one registered thing. Answer as JSON only, no prose around it.\n\nThing: Poisson's ratio\nRegistry id: vr.tr.poisson-s-ratio\nPlane / domain: XCT / XCT.QLT\nRegistry definition: (none recorded)\nNames folded into this entry: (" } } }, "metaModel": { "id": "THING-Q190453", "registryId": "vr.tr.poisson-s-ratio", "name": "Poisson's ratio", "version": "0.1.0-research.1", "entryKind": "thing", "family": "Thing Registry", "domain": [ "XCT.QLT" ], "status": "research-draft" }, "canonicalUrl": "https://ver.cy/models/thing/q190453/", "model": { "registry_id": "vr.tr.poisson-s-ratio", "name": "Poisson's ratio", "purpose": "Enable an agent to identify, interpret, compare and appropriately use Poisson's ratio as a measure of transverse deformation relative to axial deformation.", "definition": "Poisson's ratio is the dimensionless negative ratio of transverse normal strain to axial normal strain under uniaxial stress, conventionally specified in the small-strain elastic regime and for stated loading and transverse directions.", "scope_statement": "This model owns the meaning, determination and applicability of Poisson's ratio for a specified material, direction pair and loading regime; it specialises the broader concept of ratio by specifying strain operands, sign convention and mechanical assumptions.", "in_scope": [ "Definition as the negative ratio of transverse strain to axial strain under specified uniaxial loading conditions.", "Distinction between an elastic material constant and a condition-dependent or apparent strain ratio.", "Directional dependence and the distinction between isotropic and anisotropic descriptions.", "Measurement, estimation, uncertainty and traceability of reported values.", "Compatibility with constitutive assumptions and intended engineering calculations." ], "out_of_scope": [ "The general mathematical concept of ratio.", "Complete material characterisation or a full constitutive model.", "Independent models of Young's modulus, shear modulus and bulk modulus.", "Structural deformation governed primarily by geometry, supports or contact.", "Poisson distributions, Poisson processes and Poisson's equation." ], "distinguishing_features": [ "The numerator is transverse normal strain and the denominator is axial normal strain, with a leading minus sign under the usual convention.", "A material-property interpretation requires specified loading conditions; an arbitrary ratio of strains in a constrained specimen is insufficient.", "It is dimensionless and describes coupling between perpendicular normal strains, rather than stiffness or volumetric strain alone.", "For anisotropic materials, the loading direction and transverse observation direction identify the ratio; a single scalar may be insufficient.", "A negative value denotes transverse expansion during axial tension under the stated conditions and is not automatically a measurement error." ], "characteristics": [ { "name": "Reported ratio", "kind": "measurement", "unit_or_values": "Dimensionless; retain uncertainty and reporting precision.", "why_it_matters": "Provides the numerical quantity while preventing unsupported precision." }, { "name": "Ratio interpretation", "kind": "category", "unit_or_values": "Small-strain elastic constant; secant strain ratio; incremental strain ratio; dynamic response quantity; apparent ratio.", "why_it_matters": "Separates quantities that can share a name but cannot necessarily be substituted for one another." }, { "name": "Loading and transverse directions", "kind": "relation", "unit_or_values": "Ordered pair of perpendicular directions tied to specimen and material coordinates.", "why_it_matters": "Identifies which directional coupling was measured or modelled." }, { "name": "Strain definition and evaluation interval", "kind": "category", "unit_or_values": "Named strain measure, reference configuration and strain interval or evaluation point.", "why_it_matters": "Makes values interpretable when deformation is nonlinear or no longer infinitesimal." }, { "name": "Constitutive symmetry", "kind": "category", "unit_or_values": "Isotropic; transversely isotropic; orthotropic; general anisotropic; unresolved.", "why_it_matters": "Determines whether one ratio is sufficient and which consistency relations apply." }, { "name": "Loading and environmental conditions", "kind": "state", "unit_or_values": "Stress state, temperature, strain rate or frequency, elapsed time and relevant material conditioning, each with units.", "why_it_matters": "Defines the conditions under which the reported response applies." }, { "name": "Represented material scale", "kind": "category", "unit_or_values": "Constituent; local region; homogenised material; effective cellular medium; specimen-level apparent response.", "why_it_matters": "Prevents a geometry-dependent response from being mistaken for an intrinsic constituent property." }, { "name": "Evidence basis", "kind": "relation", "unit_or_values": "Direct strain measurement; elastic-constant derivation; inverse identification; simulation; cited reference value.", "why_it_matters": "Exposes the observations and assumptions behind the value." } ], "affordances": [ "Determine whether a reported number is a Poisson's ratio and identify its precise interpretation.", "Calculate a strain ratio from compatible axial and transverse measurements with an explicit sign convention.", "Compare reported values after aligning directions, strain definitions and test conditions.", "Check a value against the admissibility conditions of its stated constitutive model.", "Select a supported value for a calculation or identify missing evidence that prevents its use.", "Flag apparent auxetic behaviour for examination of measurement quality, material scale and loading constraints." ] }, "sources": [], "structure": { "bundles": [ { "id": "strain-ratio-meaning", "name": "Strain ratio meaning", "description": "Establishes what the named ratio measures and which interpretation is intended.", "rationale": "The general concept of ratio does not supply the strain operands, mechanical conditions or sign convention that distinguish Poisson's ratio.", "layers": [ { "id": "operands-and-sign", "name": "Operands and sign", "description": "Identifies the axial and transverse strains and their sign conventions.", "findings": [ { "id": "negative-transverse-to-axial-ratio", "name": "Negative transverse-to-axial ratio", "description": "Record the definition used, ordinarily ν = −ε_transverse/ε_axial, and the loading conditions that make it meaningful.", "questions": [ { "text": "Which measured or modelled normal strains are the numerator and denominator, and how are their signs defined?", "kind": "definition", "id": "negative-transverse-to-axial-ratio-q01" }, { "text": "Does the loading condition support interpreting this ratio as Poisson's ratio rather than an arbitrary strain response?", "kind": "boundary", "id": "negative-transverse-to-axial-ratio-q02" } ] } ] }, { "id": "constant-or-response", "name": "Constant or response", "description": "Separates a small-strain elastic parameter from ratios evaluated along more general deformation histories.", "findings": [ { "id": "declared-ratio-interpretation", "name": "Declared ratio interpretation", "description": "Record whether the value is an elastic constant, a secant ratio, an incremental ratio or another explicitly defined response quantity.", "questions": [ { "text": "Is the value obtained from total strains, strain increments or a fitted slope over an elastic interval?", "kind": "definition", "id": "declared-ratio-interpretation-q01" }, { "text": "Which strain measure, reference configuration and evaluation interval make this interpretation reproducible?", "kind": "measurement", "id": "declared-ratio-interpretation-q02" } ] } ] } ] }, { "id": "direction-and-material-scale", "name": "Direction and material scale", "description": "Identifies the material directions and scale to which the ratio belongs.", "rationale": "Direction and homogenisation can change the meaning of a value even when its numerical magnitude is unchanged.", "layers": [ { "id": "directional-coupling", "name": "Directional coupling", "description": "Connects the axial loading direction to the transverse observation direction.", "findings": [ { "id": "ordered-direction-pair", "name": "Ordered direction pair", "description": "Record both directions and the source's index convention instead of assuming that subscripts are used consistently across references.", "questions": [ { "text": "Which direction is loaded and which perpendicular direction supplies the transverse strain?", "kind": "definition", "id": "ordered-direction-pair-q01" }, { "text": "What evidence supports treating the material as isotropic or equating ratios measured in different directions?", "kind": "boundary", "id": "ordered-direction-pair-q02" } ] } ] }, { "id": "constituent-and-effective-response", "name": "Constituent and effective response", "description": "Distinguishes local material coupling from an effective response of a heterogeneous or cellular medium.", "findings": [ { "id": "represented-scale-and-volume", "name": "Represented scale and volume", "description": "Identify whether the ratio describes a constituent, a sampled region, a homogenised medium or the deformation of a particular specimen.", "questions": [ { "text": "What material volume or structural region does the reported ratio represent?", "kind": "provenance", "id": "represented-scale-and-volume-q01" }, { "text": "Could specimen geometry, cell arrangement or boundary effects explain the value without establishing a transferable material property?", "kind": "boundary", "id": "represented-scale-and-volume-q02" } ] } ] } ] }, { "id": "determination-and-uncertainty", "name": "Determination and uncertainty", "description": "Captures how the ratio was obtained and whether the evidence resolves the transverse response.", "rationale": "Small transverse strains, loading imperfections and inferred values require different checks before a number can be trusted.", "layers": [ { "id": "strain-observation", "name": "Strain observation", "description": "Examines paired strain measurements and the loading arrangement.", "findings": [ { "id": "paired-strain-evidence", "name": "Paired strain evidence", "description": "Record instrumentation, measurement regions, synchronisation and checks for departures from the intended stress state.", "questions": [ { "text": "How were axial and transverse strains measured over compatible regions and loading intervals?", "kind": "measurement", "id": "paired-strain-evidence-q01" }, { "text": "How were bending, misalignment, grip constraints and insufficient transverse strain resolution assessed?", "kind": "measurement", "id": "paired-strain-evidence-q02" } ] } ] }, { "id": "estimation-and-traceability", "name": "Estimation and traceability", "description": "Connects a reported value to its calculation, uncertainty and source evidence.", "findings": [ { "id": "derivation-and-confidence", "name": "Derivation and confidence", "description": "Distinguish direct measurement from derivation or inverse fitting, retaining the assumptions and uncertainty of each route.", "questions": [ { "text": "Which data, source passage or fitted model produced the reported value, and which assumptions entered the calculation?", "kind": "provenance", "id": "derivation-and-confidence-q01" }, { "text": "How do strain uncertainty, correlation between measurements and the choice of fitting interval affect uncertainty in the ratio?", "kind": "measurement", "id": "derivation-and-confidence-q02" } ] } ] } ] }, { "id": "constitutive-consistency", "name": "Constitutive consistency", "description": "Checks whether the value is admissible and mutually consistent with the assumed elastic description.", "rationale": "Bounds and modulus relationships are conditional on the constitutive model and must not be applied universally.", "layers": [ { "id": "isotropic-elastic-relations", "name": "Isotropic elastic relations", "description": "Applies familiar bounds and modulus conversions only within their stated assumptions.", "findings": [ { "id": "isotropic-assumption-check", "name": "Isotropic assumption check", "description": "For stable three-dimensional isotropic linear elasticity with positive finite bulk and shear moduli, check −1 < ν < 0.5 and consistency with E = 2G(1 + ν) and E = 3K(1 − 2ν).", "questions": [ { "text": "Are isotropy, linear elasticity and the three-dimensional constitutive interpretation justified for this value?", "kind": "boundary", "id": "isotropic-assumption-check-q01" }, { "text": "Are available Young's, shear and bulk moduli consistent with the reported ratio under matching conditions?", "kind": "measurement", "id": "isotropic-assumption-check-q02" } ] } ] }, { "id": "anisotropic-and-limiting-cases", "name": "Anisotropic and limiting cases", "description": "Handles directional coupling, auxetic response and incompressible limits without imposing inappropriate scalar rules.", "findings": [ { "id": "model-specific-admissibility", "name": "Model-specific admissibility", "description": "Assess directional ratios within the full constitutive description; distinguish negative response from instability and an incompressible idealisation from a finite compressibility measurement.", "questions": [ { "text": "For an anisotropic elastic model, do the directional ratios and moduli satisfy the applicable reciprocity and stability conditions?", "kind": "boundary", "id": "model-specific-admissibility-q01" }, { "text": "Does an unusual or limiting value represent supported material behaviour, an idealisation or an inconsistent parameter set?", "kind": "action", "id": "model-specific-admissibility-q02" } ] } ] } ] }, { "id": "conditions-and-use", "name": "Conditions and use", "description": "Defines when a value remains applicable and how an agent may use it.", "rationale": "A valid measurement can still be unsuitable for a calculation performed at another rate, temperature, deformation regime or constraint state.", "layers": [ { "id": "response-dependence", "name": "Response dependence", "description": "Records conditions that may alter the transverse-to-axial response.", "findings": [ { "id": "conditioned-applicability", "name": "Conditioned applicability", "description": "Associate the ratio with temperature, material conditioning, loading history and time or frequency where relevant.", "questions": [ { "text": "Over which temperatures, strain amplitudes, rates and loading histories is this value supported?", "kind": "boundary", "id": "conditioned-applicability-q01" }, { "text": "For time-dependent or oscillatory response, how are elapsed time, frequency and any phase difference incorporated into the definition?", "kind": "definition", "id": "conditioned-applicability-q02" } ] } ] }, { "id": "calculation-readiness", "name": "Calculation readiness", "description": "Matches an available ratio to the assumptions and sensitivity of an intended calculation.", "findings": [ { "id": "supported-parameter-selection", "name": "Supported parameter selection", "description": "Determine whether a candidate ratio can be used directly, requires conversion under justified assumptions or needs further evidence.", "questions": [ { "text": "Does the intended calculation require the same direction pair, material scale, response regime and strain interpretation as the available value?", "kind": "action", "id": "supported-parameter-selection-q01" }, { "text": "How sensitive is the result to uncertainty in this ratio, particularly when the model approaches incompressibility?", "kind": "action", "id": "supported-parameter-selection-q02" } ] } ] } ] }, { "id": "evidence-and-external-alignment", "name": "Evidence and external alignment", "description": "What the world already says about this thing, gathered so the model can be checked against it.", "rationale": "A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.", "layers": [ { "id": "reported-evidence", "name": "Reported evidence", "description": "Findings from the breadth pass, kept separate from the structural claims.", "findings": [ { "id": "evidence-confidence-notes", "name": "Check these first", "description": "Recalled without web access and unsourced; every item is a lead to verify.", "evidence": [ "This is recalled knowledge; no sources or current standard editions were consulted.", "Material-specific values require verification of direction, temperature, strain regime and measurement conditions.", "For anisotropic, nonlinear or time-dependent materials, verify the precise definition and convention used; a single constant may be insufficient." ], "questions": [ { "id": "evidence-confidence-notes-q01", "text": "Which of these check these first hold for the sense of Poisson's ratio 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": [ "Isotropic Poisson's ratio", "Directional Poisson's ratios in anisotropic materials", "Effective Poisson's ratio of composites or structured materials", "Negative Poisson's ratio associated with auxetic behaviour" ], "questions": [ { "id": "evidence-kinds-q01", "text": "Which of these kinds and varieties hold for the sense of Poisson's ratio 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": [ "ASTM International ASTM E132: Standard Test Method for Poisson's Ratio at Room Temperature." ], "questions": [ { "id": "evidence-standards-and-regulation-q01", "text": "Which of these standards and regulation hold for the sense of Poisson's ratio 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": [ "Predicting lateral contraction or expansion under axial loading.", "Specifying elastic constitutive models for structural and finite-element analysis.", "Relating elastic moduli in isotropic linear elasticity.", "Characterising composites, foams and auxetic structures.", "Interpreting elastic-wave measurements alongside density and other elastic properties." ], "questions": [ { "id": "evidence-real-world-use-q01", "text": "Which of these real-world use hold for the sense of Poisson's ratio 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": "Poisson's ratio, ν = −ε_transverse/ε_axial", "typical_range": "Many metals are approximately 0.25-0.35; nearly incompressible elastic materials approach 0.5.", "unit": "dimensionless" }, { "quantity": "Poisson's ratio for a stable isotropic linear-elastic solid with finite positive bulk and shear moduli", "typical_range": "Theoretical admissible interval: −1 < ν < 0.5; this is not a universal bound for directional values in anisotropic solids.", "unit": "dimensionless" } ], "questions": [ { "id": "evidence-measurements-q01", "text": "Which of these typical measurements hold for the sense of Poisson's ratio 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": [ "Omitting the minus sign reverses the interpretation of ordinary and auxetic behaviour.", "Using a single isotropic value for an anisotropic material can misrepresent its deformation.", "Applying a small-strain elastic value during plastic deformation or large strains can produce inaccurate predictions.", "Treating values as independent of temperature, loading rate or frequency can be misleading, particularly for polymers and viscoelastic materials.", "Using unsuitable finite-element formulations near incompressibility can cause volumetric locking and artificially stiff predictions." ], "questions": [ { "id": "evidence-failure-modes-and-hazards-q01", "text": "Which of these failure modes and hazards hold for the sense of Poisson's ratio 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": "ratio", "difference": "A ratio is a general quotient; Poisson's ratio specifies a signed quotient of transverse and axial strains under defined loading conditions." }, { "name": "Young's modulus", "difference": "Young's modulus relates axial stress to axial strain and has pressure units; Poisson's ratio relates transverse to axial strain and is dimensionless." }, { "name": "bulk modulus", "difference": "Bulk modulus measures resistance to volumetric deformation under hydrostatic loading; Poisson's ratio describes transverse response under uniaxial stress." }, { "name": "shear modulus", "difference": "Shear modulus relates shear stress to shear strain; Poisson's ratio couples normal strains in different directions." }, { "name": "auxetic behaviour", "difference": "Auxetic behaviour denotes expansion transversely when stretched, corresponding to a negative Poisson's ratio for the specified directions and conditions." } ], "questions": [ { "id": "evidence-neighbours-q01", "text": "Which of these neighbouring kinds and how to tell them apart hold for the sense of Poisson's ratio this model covers, and on what evidence?", "kind": "provenance" } ] } ] } ] } ] }, "openQuestions": [ "Which authoritative references and measurement standards should anchor the registry definition and distinguish elastic, incremental, finite-strain and dynamic uses of the name?", "Does an existing Vercy world model already cover Poisson's ratio, requiring this registry entry to link to that publication?", "Should effective ratios of cellular materials remain within this model under an explicit scale qualifier, or link to a separate effective-property model?", "Which directional index convention should the publication adopt, and how should differing source conventions be translated?", "How should time-dependent and complex dynamic ratios be represented without implying equivalence to a single elastic constant?" ], "statistics": { "bundles": 6, "layers": 11, "findings": 17, "questions": 27 } }, "draft": { "generator": "vr.draft.v3", "status": "draft-generated", "researched": false, "archetype": "abstract concept", "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 Poisson's ratio, record what state it is in, and decide what may be done with it.", "whatItIs": "Enable an agent to identify, interpret, compare and appropriately use Poisson's ratio as a measure of transverse deformation relative to axial deformation.", "characteristics": { "substance": "abstract", "origin": "conceptual", "agency": "inert" }, "whatYouCanDoWithIt": [ "observed and measured" ], "distinguishingFeatures": [ "Described in 58 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 Poisson's ratio, and on what evidence are they told apart?" ], "whatItIsMadeOf": "an abstraction with no physical instance", "physicalCharacter": [ "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" ], "howItIsRecognised": [ "Nothing to see. What is recognised is an instance of it, and which instances count is exactly what is argued about." ], "relatedModels": [], "standing": "Described in 58 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 Poisson's ratio from another, and a Poisson's ratio 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 Poisson's ratio, 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 Poisson's ratio, 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 Poisson's ratio 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 Poisson's ratio, 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 Poisson's ratio, 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 Poisson's ratio 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 Poisson's ratio 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 Poisson's ratio, 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 Poisson's ratio, 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 Poisson's ratio 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 Poisson's ratio from the things most often confused with it.", "questions": [ { "id": "distinguishing-features-q01", "text": "What identifies and describes what distinguishes a Poisson's ratio, 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 Poisson's ratio, 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 Poisson's ratio 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 Poisson's ratio 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 Poisson's ratio between them.", "questions": [ { "id": "stages-and-transitions-q01", "text": "What identifies and describes the lifecycle of a Poisson's ratio, 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 Poisson's ratio, 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 Poisson's ratio 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 Poisson's ratio, how often and by whom.", "findings": [ { "id": "observation-record", "name": "Observation record", "description": "How an observation of a Poisson's ratio 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 Poisson's ratio, 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 Poisson's ratio, 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 Poisson's ratio is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] } ] }, { "id": "definitions-in-contest", "name": "Definitions and who holds them", "description": "What Poisson's ratio is taken to mean, and by whom.", "rationale": "When a field disagrees about a concept, the disagreement is the content. A model that picks one definition silently destroys the information.", "layers": [ { "id": "competing-definitions", "name": "Competing definitions", "description": "The main readings and the traditions behind them.", "findings": [ { "id": "definition-map", "name": "Definitions and their holders", "description": "Each definition with the school or body that holds it.", "questions": [ { "id": "definition-map-q01", "text": "Which definitions of Poisson's ratio are in use, and which tradition or body holds each?", "kind": "definition" }, { "id": "definition-map-q02", "text": "What turns on the difference between them in practice?", "kind": "boundary" } ] } ] }, { "id": "operationalisation", "name": "Operationalisation", "description": "How it is measured or applied when it has to be.", "findings": [ { "id": "operational-record", "name": "Measures and proxies", "description": "Instruments and indicators used to stand in for it.", "questions": [ { "id": "operational-record-q01", "text": "How is Poisson's ratio operationalised or measured in practice, and by what instrument?", "kind": "measurement" }, { "id": "operational-record-q02", "text": "What does that operationalisation leave out, and when does that matter?", "kind": "boundary" } ] } ] } ] }, { "id": "instances-and-use", "name": "Instances, use and consequence", "description": "What counts as an instance of Poisson's ratio and what follows from calling something that.", "rationale": "Applying a concept is an act with consequences, so a model must say what the label licenses and what it does not.", "layers": [ { "id": "instances", "name": "What counts as an instance", "description": "Clear cases, borderline cases and non-cases.", "findings": [ { "id": "instance-tests", "name": "Tests for an instance", "description": "What would settle whether something falls under it.", "questions": [ { "id": "instance-tests-q01", "text": "What would settle whether something is an instance of Poisson's ratio?", "kind": "boundary" }, { "id": "instance-tests-q02", "text": "Which borderline cases are argued about, and on what grounds?", "kind": "definition" } ] } ] }, { "id": "consequence", "name": "Consequence of application", "description": "Rights, duties or decisions that follow from the label.", "findings": [ { "id": "consequence-record", "name": "What the label licenses", "description": "What an agent may do once something is classified this way.", "questions": [ { "id": "consequence-record-q01", "text": "What follows practically once something is treated as Poisson's ratio?", "kind": "action" }, { "id": "consequence-record-q02", "text": "What must an agent not infer from the label alone?", "kind": "action" } ] } ] } ] }, { "id": "provenance-and-evidence", "name": "Provenance, evidence and time", "description": "Where every claim about a Poisson's ratio 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 Poisson's ratio and how confident it is.", "questions": [ { "id": "claim-provenance-q01", "text": "What identifies and describes a claim about a Poisson's ratio, 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 Poisson's ratio, 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 Poisson's ratio 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 Poisson's ratio is retired without being erased.", "questions": [ { "id": "validity-and-supersession-q01", "text": "What identifies and describes the validity of a claim about a Poisson's ratio, 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 Poisson's ratio, 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 Poisson's ratio is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] } ] } ] }, "statistics": { "bundles": 5, "layers": 10, "findings": 12, "questions": 32 } } } }