{ "vercy": "1.0-draft", "publication": { "status": "research-draft", "adjudicationStatus": "unreviewed", "publishableCanonical": false, "generatedAt": "2026-09-11T04:26:34Z", "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", "enrichment": { "pass": 3, "engine": "claude", "producedAt": "2026-10-05T15:00:00Z", "ingestedAt": "2026-10-05T13:11:18+00:00", "fields": [ "agent_conduct", "ethics", "owners" ] }, "revisions": [ { "at": "2026-10-06T22:32:12+00:00", "engine": "codex", "fields": [ "definition", "distinguishing_features" ], "answering_review": "a69c3f551c9d21375c28e3deb6f1a3aabfb0ba6280f125642cd92c9b18421070" } ], "gate": { "passed": true, "version": "1.0", "at": "2026-10-07T10:10:25+00:00", "evidence": [ "completeness 1.00", "sense: Wikidata description", "2 live sources", "review by codex: pass" ] } }, "metaModel": { "id": "THING-Q126017", "registryId": "vr.tr.distance", "name": "distance", "version": "0.2.0-wave.1", "entryKind": "thing", "family": "Thing Registry", "domain": [ "XCT.TME" ], "status": "research-draft" }, "canonicalUrl": "https://ver.cy/models/thing/q126017/", "model": { "registry_id": "vr.tr.distance", "name": "distance", "purpose": "Let an agent state distances with their path, unit, method and uncertainty, and never mix straight-line, route and travel-time distances.", "definition": "The length of the straight line connecting two points in a measurable or observable physical space, expressed in units of length.", "what_it_is_for": "Measuring separation, for navigation, planning, engineering and science.", "affordances": [ "measure it, by survey, GNSS, laser or odometer", "compute it, from coordinates or a network", "convert it between units", "use it, for routing, pricing and planning" ], "distinguishing_features": [ "It measures straight-line length between two points.", "It is distinct from displacement, which has direction.", "It is distinct from travel time, which depends on speed.", "It always needs a unit and ideally a stated measurement method." ], "appearance": "Not a thing to look at; seen on maps, signs and instruments as a number with a unit.", "visual_identification": [ "A number with a length unit: m, km, mi, nmi, ft", "Road signs and maps state route or straight-line distances", "Track gauge, a distance between rails, is one specialised distance" ], "physical_properties": [ { "quantity": "unit", "typical_range": "metre (SI)", "unit": "m", "note": "mile 1609.344 m, nautical mile 1852 m" } ], "families_and_kinds": [ "Euclidean, great-circle, geodesic, route or network distance", "specialised distances such as track gauge and wheelbase", "abstract distances in mathematics, such as metric distances" ], "related_models": [ { "relation": "is a kind of", "target": "length", "why": "a physical quantity measured in metres" }, { "relation": "is confused with", "target": "displacement", "why": "displacement is a vector" }, { "relation": "is used in", "target": "transport and navigation", "why": "routes, fares and plans depend on it" }, { "relation": "has specialisation", "target": "track gauge", "why": "the distance between rails" } ], "identifiers": [ { "scheme": "SI unit", "value_or_pattern": "metre, symbol m", "note": "base unit of length" } ], "standards_and_regulation": [ "International System of Units (SI)", "ISO 80000-3 space and time quantities", "WGS 84 for geodetic distances" ], "failure_modes_and_hazards": [ "Unit confusion, such as miles for kilometres or feet for metres", "Mixing straight-line and route distances", "Projection errors when measuring on flat maps" ], "in_scope": [], "out_of_scope": [], "characteristics": [], "agent_conduct": { "may": [ "Measure or compute distances, stating the path, unit and method.", "Convert distances between units for its user." ], "must_not": [ "Mix straight-line, route and travel-time distances in one answer without saying so.", "Report a distance in the wrong unit where navigation, aviation or dosing depends on it.", "Use distance calculations to track a person's movements without consent." ], "requires_human": [ "Relying on a computed distance for safety-critical clearances." ] }, "ethics": { "considerations": [ "Distance errors in navigation and engineering can put lives at risk.", "Distance from services decides access to care and help in an emergency." ], "affected_parties": [ "Travellers and navigators", "People relying on emergency response" ] }, "owners": { "steward": "Nobody owns it; national metrology institutes maintain the units of length.", "master_systems": [] } }, "sources": [ { "id": "wikidata", "title": "Wikidata item Q126017: distance", "url": "https://www.wikidata.org/wiki/Q126017", "url_status": "live", "what_it_supports": "identity and sense of the item", "checked_by": "wikidata-api" }, { "id": "wikipedia-en", "title": "Wikipedia: Distance", "url": "https://en.wikipedia.org/wiki/Distance", "url_status": "live", "what_it_supports": "general description of the item", "checked_by": "wikidata-api sitelink" } ], "structure": { "bundles": [ { "id": "definition-and-path", "name": "Definition and path", "description": "What distance is meant.", "rationale": "A distance is meaningless without the path it follows.", "layers": [ { "id": "path", "name": "Path", "description": "Straight line, great circle or route.", "findings": [ { "id": "path-finding", "name": "Path type", "description": "The path along which distance is taken.", "questions": [ { "text": "Along which path is this distance measured?", "kind": "definition" }, { "text": "How different is it from the straight-line distance?", "kind": "measurement" } ] } ] }, { "id": "endpoints", "name": "Endpoints", "description": "The two points.", "findings": [ { "id": "endpoints-finding", "name": "Endpoint definition", "description": "The points and their coordinates.", "questions": [ { "text": "Between which two points exactly?", "kind": "definition" }, { "text": "How precisely are those points located?", "kind": "measurement" } ] } ] } ] }, { "id": "measurement", "name": "Measurement", "description": "How it was obtained.", "rationale": "Method determines accuracy.", "layers": [ { "id": "method", "name": "Method", "description": "Survey, GNSS, odometer, calculation.", "findings": [ { "id": "method-finding", "name": "Measurement method", "description": "The method and instrument.", "questions": [ { "text": "How was this distance measured or computed?", "kind": "provenance" }, { "text": "What is its uncertainty?", "kind": "measurement" } ] } ] }, { "id": "reference", "name": "Reference system", "description": "Datum and projection.", "findings": [ { "id": "reference-finding", "name": "Reference frame", "description": "The datum and projection used.", "questions": [ { "text": "Which datum and projection were used?", "kind": "provenance" }, { "text": "How much distortion does the projection introduce?", "kind": "measurement" } ] } ] } ] }, { "id": "units", "name": "Units", "description": "Units and conversion.", "rationale": "Unit errors have caused real accidents.", "layers": [ { "id": "unit", "name": "Unit", "description": "The unit stated.", "findings": [ { "id": "unit-finding", "name": "Unit stated", "description": "The unit and its definition.", "questions": [ { "text": "In which unit is this distance given?", "kind": "definition" }, { "text": "Could the unit be misread?", "kind": "boundary" } ] } ] }, { "id": "conversion", "name": "Conversion", "description": "Converting units.", "findings": [ { "id": "conversion-finding", "name": "Conversion factors", "description": "Exact conversion factors.", "questions": [ { "text": "Which exact factor converts this unit to metres?", "kind": "measurement" }, { "text": "What rounding was applied?", "kind": "measurement" } ] } ] } ] }, { "id": "use", "name": "Use", "description": "Distances in decisions.", "rationale": "Distances drive fares, routes and safety margins.", "layers": [ { "id": "application", "name": "Application", "description": "Where the distance is used.", "findings": [ { "id": "application-finding", "name": "Use context", "description": "The decision the distance feeds.", "questions": [ { "text": "What decision does this distance feed?", "kind": "definition" }, { "text": "Would a travel time be more appropriate?", "kind": "boundary" } ] } ] }, { "id": "margins", "name": "Safety margins", "description": "Distances as limits.", "findings": [ { "id": "margins-finding", "name": "Margin rules", "description": "Required minimum distances.", "questions": [ { "text": "Is a minimum distance required here, and by which rule?", "kind": "provenance" }, { "text": "How is compliance measured?", "kind": "measurement" } ] } ] } ] } ] }, "openQuestions": [ "Should route distance and straight-line distance be separate entries?", "How should uncertainty in measured distances be recorded?", "Should specialised distances such as track gauge be children of this entry?" ], "statistics": { "bundles": 4, "layers": 8, "findings": 8, "questions": 16 } }