{ "model": { "rank": 500, "code": "thing-q573", "model_id": "vr.tr.day", "name": "day", "purpose": "Let an agent distinguish the day as a unit of time, as a solar period and as a calendar date, and handle time zones and daylight saving correctly.", "family": "Thing Registry", "category": "Cross-cutting context", "status": "research-draft", "kind": "thing", "plane": "XCT", "domain": "XCT.TME", "industry": "", "version": "", "url": "/models/thing/q573/", "tier": 2, "score": 254, "payload": { "layer": "wikidata", "aliases": [], "aliasCount": 0, "merged": 0, "knownIn": 254, "facets": null, "markers": [], "lexicalClass": "", "senseRank": null, "alsoRegisteredAs": "vr.tr.day-6", "source": { "dataset": "wikidata", "item": "Q573", "url": "https://www.wikidata.org/wiki/Q573", "license": "CC0 1.0" } }, "research": { "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" }, "metaModel": { "id": "THING-Q573", "registryId": "vr.tr.day", "name": "day", "version": "0.2.0-wave.1", "entryKind": "thing", "family": "Thing Registry", "domain": [ "XCT.TME" ], "status": "research-draft" }, "canonicalUrl": "https://ver.cy/models/thing/q573/", "model": { "registry_id": "vr.tr.day", "name": "day", "purpose": "Let an agent distinguish the day as a unit of time, as a solar period and as a calendar date, and handle time zones and daylight saving correctly.", "definition": "A unit of time of 86,400 seconds, and the period of one rotation of the Earth relative to the Sun, reckoned from midnight to midnight in civil use.", "what_it_is_for": "Organising time for daily life, work, law and science.", "affordances": [ "count days, for durations and deadlines", "name days, with calendar dates and weekdays", "divide days, into hours, minutes and seconds", "adjust them, as with leap seconds and daylight saving shifts" ], "distinguishing_features": [ "A unit of time and a solar cycle, which differ slightly", "The civil day follows a time zone and can be 23 or 25 hours on daylight saving changes", "Distinct from daytime, the light part of the day", "A calendar date names a particular day" ], "appearance": "Experienced as daylight and night; recorded on clocks and calendars.", "visual_identification": [ "Sunrise and sunset mark daylight, not the civil day", "Calendars show days as dates and weekdays", "Clocks reset at midnight in civil time" ], "physical_properties": [ { "quantity": "length", "typical_range": "86400", "unit": "s", "note": "SI day; mean solar day varies by milliseconds" }, { "quantity": "sidereal day", "typical_range": "86164.09", "unit": "s", "note": "rotation relative to the stars" } ], "families_and_kinds": [ "solar day, sidereal day, civil day", "working day, business day, calendar day", "by name: weekdays" ], "related_models": [ { "relation": "is a kind of", "target": "unit of time", "why": "accepted for use with the SI" }, { "relation": "is named by", "target": "calendar date", "why": "a date identifies one day" }, { "relation": "is divided into", "target": "hour", "why": "24 hours in civil time" }, { "relation": "is confused with", "target": "daytime", "why": "daylight is only part of the day" } ], "identifiers": [ { "scheme": "unit symbol", "value_or_pattern": "d", "note": "accepted for use with the SI" } ], "standards_and_regulation": [ "SI Brochure, non-SI units accepted for use", "ISO 8601 for date and time representation", "National laws on time zones and daylight saving" ], "failure_modes_and_hazards": [ "Assuming every day has 24 hours across daylight saving changes", "Confusing calendar days with business days in deadlines", "Time zone errors that move events to another day" ], "in_scope": [], "out_of_scope": [], "characteristics": [] }, "sources": [], "structure": { "bundles": [ { "id": "unit-and-astronomy", "name": "Unit and astronomy", "description": "The day as unit and as rotation.", "rationale": "The unit and the astronomical day differ; precision work needs the distinction.", "layers": [ { "id": "unit", "name": "Unit", "description": "Definition in seconds.", "findings": [ { "id": "unit-finding", "name": "Unit definition", "description": "The unit and its relation to SI.", "questions": [ { "text": "Which definition of day applies here?", "kind": "definition" }, { "text": "Does the precision required make the difference matter?", "kind": "boundary" } ] } ] }, { "id": "astronomy", "name": "Astronomical day", "description": "Solar and sidereal days.", "findings": [ { "id": "astronomy-finding", "name": "Astronomical basis", "description": "The astronomical day used.", "questions": [ { "text": "Is the solar or the sidereal day meant?", "kind": "definition" }, { "text": "How does day length vary over the year?", "kind": "measurement" } ] } ] } ] }, { "id": "civil-day", "name": "Civil day", "description": "Days in time zones.", "rationale": "The civil day is political: governments set time zones and daylight saving.", "layers": [ { "id": "zone", "name": "Time zone", "description": "The zone the day belongs to.", "findings": [ { "id": "zone-finding", "name": "Zone rules", "description": "The zone and its offset rules.", "questions": [ { "text": "In which time zone is this day reckoned?", "kind": "definition" }, { "text": "Does a daylight saving change fall on it?", "kind": "boundary" } ] } ] }, { "id": "boundaries", "name": "Day boundaries", "description": "Midnight and edge cases.", "findings": [ { "id": "boundaries-finding", "name": "Boundary rules", "description": "When the day begins and ends.", "questions": [ { "text": "When does this day begin and end?", "kind": "definition" }, { "text": "How are events near midnight assigned?", "kind": "action" } ] } ] } ] }, { "id": "counting", "name": "Counting days", "description": "Durations and deadlines.", "rationale": "Counting days in law and business follows rules that differ from simple arithmetic.", "layers": [ { "id": "durations", "name": "Durations", "description": "Calendar and business days.", "findings": [ { "id": "durations-finding", "name": "Counting rule", "description": "Which days are counted.", "questions": [ { "text": "Are calendar days or business days counted?", "kind": "definition" }, { "text": "Which holidays are excluded, and in which jurisdiction?", "kind": "boundary" } ] } ] }, { "id": "deadlines", "name": "Deadlines", "description": "Day-based deadlines.", "findings": [ { "id": "deadlines-finding", "name": "Deadline rule", "description": "How a day-count deadline is computed.", "questions": [ { "text": "How is this deadline computed in days?", "kind": "definition" }, { "text": "What happens when it falls on a non-working day?", "kind": "boundary" } ] } ] } ] }, { "id": "naming", "name": "Naming", "description": "Weekdays and dates.", "rationale": "Days are named in several ways at once.", "layers": [ { "id": "weekday", "name": "Weekday", "description": "The day of the week.", "findings": [ { "id": "weekday-finding", "name": "Weekday naming", "description": "The weekday and numbering convention.", "questions": [ { "text": "Which weekday is this, and which numbering convention applies?", "kind": "definition" }, { "text": "Does the week start on Monday or Sunday here?", "kind": "boundary" } ] } ] }, { "id": "date", "name": "Date", "description": "The calendar date.", "findings": [ { "id": "date-finding", "name": "Date identifier", "description": "The date naming this day.", "questions": [ { "text": "Which calendar date names this day?", "kind": "definition" }, { "text": "In which calendar?", "kind": "definition" } ] } ] } ] } ] }, "openQuestions": [ "Should the civil day and the solar day be separate entries?", "How should business days be modelled across jurisdictions with different holidays?", "How should agents present day counts that cross time zones?" ], "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 day, record what state it is in, and decide what may be done with it.", "whatItIs": "Let an agent distinguish the day as a unit of time, as a solar period and as a calendar date, and handle time zones and daylight saving correctly.", "characteristics": { "substance": "abstract", "origin": "conceptual", "agency": "inert" }, "whatYouCanDoWithIt": [ "observed and measured" ], "distinguishingFeatures": [ "Described in 254 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 day, 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 254 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 day from another, and a day 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 day, 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 day, 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 day 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 day, 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 day, 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 day 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 day 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 day, 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 day, 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 day 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 day from the things most often confused with it.", "questions": [ { "id": "distinguishing-features-q01", "text": "What identifies and describes what distinguishes a day, 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 day, 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 day 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 day 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 day between them.", "questions": [ { "id": "stages-and-transitions-q01", "text": "What identifies and describes the lifecycle of a day, 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 day, 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 day 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 day, how often and by whom.", "findings": [ { "id": "observation-record", "name": "Observation record", "description": "How an observation of a day 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 day, 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 day, 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 day 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 day 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 day 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 day 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 day 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 day?", "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 day?", "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 day 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 day and how confident it is.", "questions": [ { "id": "claim-provenance-q01", "text": "What identifies and describes a claim about a day, 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 day, 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 day 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 day is retired without being erased.", "questions": [ { "id": "validity-and-supersession-q01", "text": "What identifies and describes the validity of a claim about a day, 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 day, 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 day 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 } } } }