{ "model": { "rank": 1168, "code": "thing-q11500", "model_id": "vr.tr.area", "name": "area", "purpose": "Let an agent handle area by definition, units, calculation, measurement and domain-specific uses.", "family": "Thing Registry", "category": "Cross-cutting context", "status": "research-draft", "kind": "thing", "plane": "XCT", "domain": "XCT.QLT", "industry": "", "version": "", "url": "/models/thing/q11500/", "tier": 2, "score": 174, "payload": { "layer": "wikidata", "aliases": [ "fault zone", "cadastral area", "cross section", "nuclear cross section", "equivalent sound absorption area", "fission cross section", "slowing-down area", "diffusion area", "migration area", "pupil opening area", "effective area", "surface area of the event horizon", "net lease area", "area element", "surface area", "net technical space", "acreage", "wing area", "plane area", "cross-sectional area", "wetted area", "signed area", "contact area", "floor area", "lateral surface", "built area", "projected area", "scattering cross section", "neutron cross section", "total cross section", "area of a bivariate surface", "body surface area", "surface area of a closed cylinder", "surface area of an open cylinder", "surface area of an open cone", "area of a quadrilateral", "aspect area", "net signed area", "gross floor area", "gross living area" ], "aliasCount": 43, "merged": 43, "knownIn": 174, "facets": null, "markers": [], "lexicalClass": "", "senseRank": null, "alsoRegisteredAs": "vr.tr.area-attribute", "source": { "dataset": "wikidata", "item": "Q11500", "url": "https://www.wikidata.org/wiki/Q11500", "license": "CC0 1.0" } }, "research": { "vercy": "1.0-draft", "publication": { "status": "research-draft", "adjudicationStatus": "unreviewed", "publishableCanonical": false, "generatedAt": "2026-09-11T08:35:59Z", "providers": [ "Claude" ], "breadth": "written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify", "pass": 2, "wave": 1, "engine": "claude" }, "metaModel": { "id": "THING-Q11500", "registryId": "vr.tr.area", "name": "area", "version": "0.2.0-wave.1", "entryKind": "thing", "family": "Thing Registry", "domain": [ "XCT.QLT" ], "status": "research-draft" }, "canonicalUrl": "https://ver.cy/models/thing/q11500/", "model": { "registry_id": "vr.tr.area", "name": "area", "purpose": "Let an agent handle area by definition, units, calculation, measurement and domain-specific uses.", "definition": "A quantity expressing the extent of a two-dimensional surface or region, measured in square units such as square metres; related technical quantities include cross sections in physics and equivalent absorption area in acoustics.", "what_it_is_for": "Measuring land, floors, surfaces and cross sections.", "affordances": [ "compute areas of shapes", "convert area units", "measure floor or land area", "use cross sections in physics" ], "distinguishing_features": [ "Extent of a surface", "Square units", "Measurement conventions vary for buildings and land", "Technical senses in physics and acoustics" ], "appearance": "Not visible itself; the size of a surface.", "visual_identification": [ "Units such as m2, hectare, acre", "Floor area and land area figures", "Cross section in physics is measured in barns" ], "physical_properties": [ { "quantity": "hectare", "typical_range": "10000", "unit": "m2", "note": "exact" }, { "quantity": "acre", "typical_range": "about 4046.86", "unit": "m2", "note": "" } ], "families_and_kinds": [ "geometric area", "land and cadastral area", "floor area", "surface area", "cross sections" ], "related_models": [ { "relation": "is a kind of", "target": "physical quantity and geometric measure", "why": "category" }, { "relation": "is measured in", "target": "square metre", "why": "unit" }, { "relation": "is computed for", "target": "polygon and circle", "why": "shapes" }, { "relation": "is related to", "target": "volume", "why": "three dimensions" } ], "identifiers": [ { "scheme": "SI unit", "value_or_pattern": "square metre (m2)", "note": "unit" } ], "standards_and_regulation": [ "ISO 80000-3", "Floor area measurement standards such as IPMS", "Cadastral survey rules" ], "failure_modes_and_hazards": [ "Different floor area definitions", "Unit conversion errors", "Map projection distortion of areas" ], "in_scope": [], "out_of_scope": [], "characteristics": [] }, "sources": [], "structure": { "bundles": [ { "id": "calculation", "name": "Calculation", "description": "Computing area.", "rationale": "Formulas apply.", "layers": [ { "id": "shape", "name": "Shape", "description": "Formula.", "findings": [ { "id": "shape-finding", "name": "Shape", "description": "Area calculation.", "questions": [ { "text": "What is the area of this shape?", "kind": "measurement" }, { "text": "Which formula applies?", "kind": "definition" } ] } ] }, { "id": "units", "name": "Units", "description": "Conversion.", "findings": [ { "id": "units-finding", "name": "Units", "description": "Units.", "questions": [ { "text": "What is the area in the required unit?", "kind": "measurement" }, { "text": "Is the conversion exact?", "kind": "boundary" } ] } ] } ] }, { "id": "buildings", "name": "Buildings", "description": "Floor area.", "rationale": "Definitions differ.", "layers": [ { "id": "standard", "name": "Standard", "description": "Measurement rules.", "findings": [ { "id": "standard-finding", "name": "Standard", "description": "Floor area standard.", "questions": [ { "text": "Which floor area standard is used: gross, net or IPMS?", "kind": "provenance" }, { "text": "What is included?", "kind": "definition" } ] } ] }, { "id": "comparison", "name": "Comparison", "description": "Like for like.", "findings": [ { "id": "comparison-finding", "name": "Comparison", "description": "Comparison.", "questions": [ { "text": "Are areas measured the same way for comparison?", "kind": "boundary" }, { "text": "Who measured them?", "kind": "provenance" } ] } ] } ] }, { "id": "land", "name": "Land", "description": "Cadastre.", "rationale": "Land area needs surveys.", "layers": [ { "id": "survey", "name": "Survey", "description": "Measurement.", "findings": [ { "id": "survey-finding", "name": "Survey", "description": "Land survey.", "questions": [ { "text": "What is the official land area, from the cadastre?", "kind": "provenance" }, { "text": "How accurate is it?", "kind": "measurement" } ] } ] }, { "id": "maps", "name": "Maps", "description": "Projection.", "findings": [ { "id": "maps-finding", "name": "Maps", "description": "Map areas.", "questions": [ { "text": "Is the map projection distorting areas?", "kind": "boundary" }, { "text": "Which projection preserves area?", "kind": "definition" } ] } ] } ] }, { "id": "science", "name": "Science", "description": "Technical senses.", "rationale": "Area has technical uses.", "layers": [ { "id": "cross-section", "name": "Cross section", "description": "Physics.", "findings": [ { "id": "cross-section-finding", "name": "Cross section", "description": "Cross section.", "questions": [ { "text": "Is a reaction cross section meant?", "kind": "boundary" }, { "text": "In which unit?", "kind": "definition" } ] } ] }, { "id": "acoustics", "name": "Acoustics", "description": "Absorption area.", "findings": [ { "id": "acoustics-finding", "name": "Acoustics", "description": "Absorption area.", "questions": [ { "text": "What is the equivalent absorption area of the room?", "kind": "measurement" }, { "text": "How is it measured?", "kind": "provenance" } ] } ] } ] } ] }, "openQuestions": [ "Should area kinds be separate entries?", "How should measurement standards be linked?", "How should cross sections be split off?" ], "statistics": { "bundles": 4, "layers": 8, "findings": 8, "questions": 16 } }, "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 area, record what state it is in, and decide what may be done with it.", "whatItIs": "Let an agent handle area by definition, units, calculation, measurement and domain-specific uses.", "characteristics": { "substance": "abstract", "origin": "conceptual", "agency": "inert" }, "whatYouCanDoWithIt": [ "observed and measured" ], "distinguishingFeatures": [ "Names folded into this entry, which a task may need to split apart again: fault zone, cadastral area, cross section, nuclear cross section, equivalent sound absorption area, fission cross section, slowing-down area, diffusion area, migration area, pupil opening area, effective area, surface area of the event horizon.", "43 finer distinctions are held as aliases rather than separate entries, because telling them apart needs a task that asks for it.", "Described in 174 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 area, 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": [ { "relation": "covers", "note": "Finer kinds folded into this entry because telling them apart needs a task that asks for it. Each is a model waiting to be split out when one does.", "targets": [ "fault zone", "cadastral area", "cross section", "nuclear cross section", "equivalent sound absorption area", "fission cross section", "slowing-down area", "diffusion area", "migration area", "pupil opening area", "effective area", "surface area of the event horizon" ] } ], "standing": "Described in 174 Wikipedia languages, which measures how widely it is written about rather than how important or how common it is. 43 finer distinctions are held inside this entry as names rather than as separate models.", "structure": { "bundles": [ { "id": "identity-and-classification", "name": "Identity, naming and classification", "description": "How an agent tells one area from another, and a area 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 area, 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 area, 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 area 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 area, 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 area, 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 area 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 area 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 area, 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 area, 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 area 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 area from the things most often confused with it.", "questions": [ { "id": "distinguishing-features-q01", "text": "What identifies and describes what distinguishes a area, 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 area, 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 area 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 area 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 area between them.", "questions": [ { "id": "stages-and-transitions-q01", "text": "What identifies and describes the lifecycle of a area, 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 area, 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 area 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 area, how often and by whom.", "findings": [ { "id": "observation-record", "name": "Observation record", "description": "How an observation of a area 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 area, 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 area, 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 area 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 area 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 area 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 area 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 area 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 area?", "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 area?", "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 area 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 area and how confident it is.", "questions": [ { "id": "claim-provenance-q01", "text": "What identifies and describes a claim about a area, 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 area, 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 area 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 area is retired without being erased.", "questions": [ { "id": "validity-and-supersession-q01", "text": "What identifies and describes the validity of a claim about a area, 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 area, 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 area 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 } } } }