{
  "vercy": "1.0-draft",
  "publication": {
    "status": "research-draft",
    "adjudicationStatus": "unreviewed",
    "publishableCanonical": false,
    "generatedAt": "2026-09-11T04:52:40Z",
    "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": "2026-10-05T16:30:00Z",
      "ingestedAt": "2026-10-05T13:21:22+00:00",
      "fields": [
        "agent_conduct",
        "ethics",
        "owners"
      ]
    },
    "gate": {
      "passed": true,
      "version": "1.0",
      "at": "2026-10-06T19:52:01+00:00",
      "evidence": [
        "completeness 1.00",
        "sense: Wikidata description",
        "2 live sources",
        "review by codex: pass"
      ]
    }
  },
  "metaModel": {
    "id": "THING-Q577",
    "registryId": "vr.tr.year",
    "name": "year",
    "version": "0.2.0-wave.1",
    "entryKind": "thing",
    "family": "Thing Registry",
    "domain": [
      "XCT.TME"
    ],
    "status": "research-draft"
  },
  "canonicalUrl": "https://ver.cy/models/thing/q577/",
  "model": {
    "registry_id": "vr.tr.year",
    "name": "year",
    "purpose": "Let an agent handle years by definition (calendar, tropical, fiscal, academic), calendar system and numbering, and avoid errors from mismatched year definitions.",
    "definition": "The time the Earth takes to orbit the Sun, about 365.24 days, and the calendar unit of 365 or 366 days based on it; also used for other year definitions such as school or fiscal years.",
    "what_it_is_for": "Organising time into seasons and annual cycles for law, business, education and culture.",
    "affordances": [
      "count and number years, in a calendar era",
      "define custom years, such as fiscal or academic",
      "convert between calendars",
      "account for leap years"
    ],
    "distinguishing_features": [
      "Several definitions: tropical, sidereal, calendar, fiscal, academic",
      "Calendar years depend on the calendar system",
      "Leap years keep the calendar aligned with seasons",
      "Some systems name years instead of numbering them"
    ],
    "appearance": "Not a thing to see; shown as a number (2026), a label (FY2026/27) or a name in some calendars (such as Yang Metal Dragon in the Chinese cycle).",
    "visual_identification": [
      "Four-digit year numbers in the Gregorian calendar",
      "Fiscal and academic year labels spanning two calendar years",
      "Names in cyclical calendars"
    ],
    "physical_properties": [
      {
        "quantity": "tropical year",
        "typical_range": "365.2422",
        "unit": "days",
        "note": ""
      },
      {
        "quantity": "Gregorian calendar year",
        "typical_range": "365 or 366",
        "unit": "days",
        "note": ""
      },
      {
        "quantity": "Julian year (astronomy)",
        "typical_range": "365.25",
        "unit": "days",
        "note": "used for light years"
      }
    ],
    "families_and_kinds": [
      "calendar year",
      "tropical and sidereal year",
      "fiscal year",
      "academic or school year",
      "leap year, even and odd years, century years",
      "commemorative years"
    ],
    "related_models": [
      {
        "relation": "is made of",
        "target": "day",
        "why": "365 or 366 days"
      },
      {
        "relation": "is part of",
        "target": "calendar",
        "why": "calendar system"
      },
      {
        "relation": "is confused with",
        "target": "fiscal year",
        "why": "business and government years differ"
      },
      {
        "relation": "names",
        "target": "calendar date",
        "why": "the year component of dates"
      }
    ],
    "identifiers": [
      {
        "scheme": "ISO 8601 year",
        "value_or_pattern": "YYYY",
        "note": "with extended forms for years outside 0000-9999"
      }
    ],
    "standards_and_regulation": [
      "ISO 8601",
      "National laws defining fiscal years",
      "IAU definitions of Julian year"
    ],
    "failure_modes_and_hazards": [
      "Mixing calendar and fiscal years",
      "Leap year bugs such as 29 February handling",
      "Year 2038 and similar overflow limits in software",
      "Converting historical years across calendar reforms"
    ],
    "in_scope": [],
    "out_of_scope": [],
    "characteristics": [],
    "agent_conduct": {
      "may": [
        "Calculate dates and durations with correct leap year rules.",
        "State which year is meant: calendar, fiscal, school or another."
      ],
      "must_not": [
        "Mix calendar and fiscal years without saying so.",
        "Store years in a way that overflows or wraps, such as two-digit years or limited time counters.",
        "Convert historical years across calendar reforms without stating the calendar used."
      ],
      "requires_human": [
        "Changing year-end dates used for legal or financial deadlines."
      ]
    },
    "ethics": {
      "considerations": [
        "Deadlines tied to years decide rights, benefits and penalties."
      ],
      "affected_parties": [
        "People with year-based deadlines",
        "Users of software"
      ]
    },
    "owners": {
      "steward": "Nobody owns the year; standards bodies define calendars and date formats.",
      "master_systems": []
    }
  },
  "sources": [
    {
      "id": "wikidata",
      "title": "Wikidata item Q577: year",
      "url": "https://www.wikidata.org/wiki/Q577",
      "url_status": "live",
      "what_it_supports": "identity and sense of the item",
      "checked_by": "wikidata-api"
    },
    {
      "id": "wikipedia-en",
      "title": "Wikipedia: Year",
      "url": "https://en.wikipedia.org/wiki/Year",
      "url_status": "live",
      "what_it_supports": "general description of the item",
      "checked_by": "wikidata-api sitelink"
    }
  ],
  "structure": {
    "bundles": [
      {
        "id": "definition",
        "name": "Definition",
        "description": "Which year.",
        "rationale": "Year definitions differ; the definition must be explicit.",
        "layers": [
          {
            "id": "kind",
            "name": "Kind",
            "description": "Calendar, fiscal, academic, astronomical.",
            "findings": [
              {
                "id": "kind-finding",
                "name": "Year kind",
                "description": "The kind of year.",
                "questions": [
                  {
                    "text": "Which kind of year is meant here?",
                    "kind": "definition"
                  },
                  {
                    "text": "When does it start and end?",
                    "kind": "boundary"
                  }
                ]
              }
            ]
          },
          {
            "id": "calendar",
            "name": "Calendar",
            "description": "Gregorian or other.",
            "findings": [
              {
                "id": "calendar-finding",
                "name": "Calendar",
                "description": "The calendar used.",
                "questions": [
                  {
                    "text": "In which calendar is this year counted?",
                    "kind": "definition"
                  },
                  {
                    "text": "What is its Gregorian equivalent?",
                    "kind": "measurement"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "length",
        "name": "Length",
        "description": "Days in the year.",
        "rationale": "Leap rules matter for calculations.",
        "layers": [
          {
            "id": "leap",
            "name": "Leap years",
            "description": "Rules.",
            "findings": [
              {
                "id": "leap-finding",
                "name": "Leap rule",
                "description": "The leap rule.",
                "questions": [
                  {
                    "text": "Is this a leap year under the applicable rule?",
                    "kind": "measurement"
                  },
                  {
                    "text": "How is 29 February handled in this system?",
                    "kind": "boundary"
                  }
                ]
              }
            ]
          },
          {
            "id": "duration",
            "name": "Duration",
            "description": "Astronomical lengths.",
            "findings": [
              {
                "id": "duration-finding",
                "name": "Duration",
                "description": "Which length is used.",
                "questions": [
                  {
                    "text": "Which year length does this calculation assume?",
                    "kind": "definition"
                  },
                  {
                    "text": "How much error does that introduce?",
                    "kind": "measurement"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "numbering",
        "name": "Numbering",
        "description": "Eras and names.",
        "rationale": "Years are numbered or named differently across cultures.",
        "layers": [
          {
            "id": "era",
            "name": "Era",
            "description": "CE, AH, other eras.",
            "findings": [
              {
                "id": "era-finding",
                "name": "Era",
                "description": "The era and numbering.",
                "questions": [
                  {
                    "text": "In which era is the year numbered?",
                    "kind": "definition"
                  },
                  {
                    "text": "Is there a year zero in this system?",
                    "kind": "boundary"
                  }
                ]
              }
            ]
          },
          {
            "id": "names",
            "name": "Names",
            "description": "Cyclical names.",
            "findings": [
              {
                "id": "names-finding",
                "name": "Year names",
                "description": "Names in cyclical calendars.",
                "questions": [
                  {
                    "text": "What is the name of this year in the relevant cyclical calendar?",
                    "kind": "definition"
                  },
                  {
                    "text": "When does that year begin?",
                    "kind": "measurement"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "use",
        "name": "Use",
        "description": "Years in law, business and software.",
        "rationale": "Year boundaries drive deadlines, accounts and software behaviour.",
        "layers": [
          {
            "id": "business",
            "name": "Fiscal and academic years",
            "description": "Institutional years.",
            "findings": [
              {
                "id": "business-finding",
                "name": "Institutional year",
                "description": "The institutional year definition.",
                "questions": [
                  {
                    "text": "Which fiscal or academic year applies, and how is it labelled?",
                    "kind": "definition"
                  },
                  {
                    "text": "Who defines it?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          },
          {
            "id": "software",
            "name": "Software limits",
            "description": "Date limits and bugs.",
            "findings": [
              {
                "id": "software-finding",
                "name": "Software limits",
                "description": "Known year-related limits.",
                "questions": [
                  {
                    "text": "Does the system handle leap years and dates beyond 2038 correctly?",
                    "kind": "boundary"
                  },
                  {
                    "text": "How is the year stored?",
                    "kind": "definition"
                  }
                ]
              }
            ]
          }
        ]
      }
    ]
  },
  "openQuestions": [
    "Should each kind of year be a separate entry?",
    "How should fiscal years be recorded per organisation and country?",
    "How should cyclical year names be linked to numbers?"
  ],
  "statistics": {
    "bundles": 4,
    "layers": 8,
    "findings": 8,
    "questions": 16
  }
}