{
    "model": {
        "rank": 5851,
        "code": "thing-q229026",
        "model_id": "vr.tr.indian-national-calendar",
        "name": "Indian national calendar",
        "purpose": "Enable an AI agent to recognise the Indian national calendar, assess whether a date or implementation follows its rules, and determine when conversion or official use is justified.",
        "family": "Thing Registry",
        "category": "Information and virtual systems",
        "status": "research-draft",
        "kind": "thing",
        "plane": "INF",
        "domain": "INF.KNW",
        "industry": "",
        "version": "",
        "url": "/models/thing/q229026/",
        "tier": 2,
        "score": 64,
        "payload": {
            "layer": "wikidata",
            "aliases": [],
            "aliasCount": 0,
            "merged": 0,
            "knownIn": 64,
            "facets": null,
            "markers": [],
            "lexicalClass": "",
            "senseRank": null,
            "alsoRegisteredAs": null,
            "source": {
                "dataset": "wikidata",
                "item": "Q229026",
                "url": "https://www.wikidata.org/wiki/Q229026",
                "license": "CC0 1.0"
            }
        },
        "research": {
            "vercy": "1.0-draft",
            "publication": {
                "status": "research-draft",
                "adjudicationStatus": "unreviewed",
                "publishableCanonical": false,
                "generatedAt": "2026-09-07T09:39:49Z",
                "providers": [
                    "Codex",
                    "Grok"
                ],
                "missingProviders": [],
                "pass": 2,
                "cost": {
                    "grok": {
                        "usd": 0.00596496,
                        "turns": 1,
                        "seconds": 36.6,
                        "error": null
                    },
                    "codex": {
                        "seconds": 106.2,
                        "error": "Reading additional input from stdin...\nOpenAI Codex v0.153.3\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: 01a07b3b-5d4e-70e1-8d2f-fce87ca15395\n--------\nuser\nYou are drafting a Vercy meta-model for one registered thing. Answer as JSON only, no prose around it.\n\nThing: Indian national calendar\nRegistry id: vr.tr.indian-national-calendar\nPlane / domain: INF / INF.KNW\nRegistry definition: (none recorded)\nNames folded "
                    }
                }
            },
            "metaModel": {
                "id": "THING-Q229026",
                "registryId": "vr.tr.indian-national-calendar",
                "name": "Indian national calendar",
                "version": "0.1.0-research.1",
                "entryKind": "thing",
                "family": "Thing Registry",
                "domain": [
                    "INF.KNW"
                ],
                "status": "research-draft"
            },
            "canonicalUrl": "https://ver.cy/models/thing/q229026/",
            "model": {
                "registry_id": "vr.tr.indian-national-calendar",
                "name": "Indian national calendar",
                "purpose": "Enable an AI agent to recognise the Indian national calendar, assess whether a date or implementation follows its rules, and determine when conversion or official use is justified.",
                "definition": "The Indian national calendar is India's official civil Saka-era solar calendar, adopted by the Government of India in 1957, with twelve fixed-length months and leap years aligned to the Gregorian cycle, used alongside the Gregorian calendar in official communications.",
                "scope_statement": "This model owns the identity, civil date rules, interpretation boundaries and evidenced applicability of the Indian national calendar registered as vr.tr.indian-national-calendar in INF / INF.KNW.",
                "in_scope": [
                    "Identification of the national civil calendar and its Saka year numbering",
                    "Month order, day limits, leap-year determination and year rollover",
                    "Correspondence with Gregorian civil dates",
                    "Interpretation of multilingual month names and explicitly identified calendar dates",
                    "Evidence for official applicability and conformance of calendar representations"
                ],
                "out_of_scope": [
                    "Regional Hindu lunisolar calendars and their festival calculations",
                    "Historical Saka-era chronology beyond its relationship to national calendar numbering",
                    "Vikram Samvat and other neighbouring calendar systems",
                    "Public holiday declarations and organisational working-day policies",
                    "Astronomical ephemerides, tithis, nakshatras and astrological interpretation",
                    "Clock synchronisation and time-zone rules, except as dependencies when assigning an instant to a civil date"
                ],
                "distinguishing_features": [
                    "Require evidence of the national civil solar rules; a Saka year label alone does not establish this calendar. The national reform introduced a solar calendar for civil use. [Positional Astronomy Centre](https://packolkata.gov.in/INDIAN_CALADAR_PAC.pdf)",
                    "Check that Chaitra 1 corresponds to Gregorian March 22 in a common year and March 21 in a Gregorian leap year. [National Calendar](https://www.iipa.org.in/cms/public/uploads/123571650968187.pdf)",
                    "Check the fixed twelve-month pattern: Chaitra has 30 or 31 days, the next five months have 31 each, and the remaining six have 30 each. [Civil calendar rules](https://eclipse.gsfc.nasa.gov/SEhelp/calendars.html)",
                    "Distinguish adoption of the modern calendar on 22 March 1957 from the much earlier era used to number its years. [Press Information Bureau](https://www.pib.gov.in/PressReleasePage.aspx?PRID=1707068&lang=2&reg=48)"
                ],
                "characteristics": [
                    {
                        "name": "Calendar identification",
                        "kind": "state",
                        "unit_or_values": "confirmed national civil calendar; ambiguous Saka usage; conflicting calendar evidence",
                        "why_it_matters": "Prevents applying national calendar arithmetic to a regional calendar sharing its era or month names."
                    },
                    {
                        "name": "Saka year correspondence",
                        "kind": "relation",
                        "unit_or_values": "For Gregorian year G, Saka year is G minus 78 from that year's Chaitra 1 onward, and G minus 79 before it.",
                        "why_it_matters": "Prevents a one-year conversion error before the March new year. [Civil calendar rules](https://eclipse.gsfc.nasa.gov/SEhelp/calendars.html)"
                    },
                    {
                        "name": "Year class",
                        "kind": "category",
                        "unit_or_values": "common or leap; evaluate Gregorian leap status for Saka year plus 78",
                        "why_it_matters": "Determines whether Chaitra has an additional day. [Civil calendar rules](https://eclipse.gsfc.nasa.gov/SEhelp/calendars.html)"
                    },
                    {
                        "name": "Ordered month vocabulary",
                        "kind": "category",
                        "unit_or_values": "Chaitra, Vaisakha, Jyaistha, Asadha, Sravana, Bhadra, Asvina, Kartika, Agrahayana, Pausa, Magha, Phalguna; retain evidenced spelling variants",
                        "why_it_matters": "Gives month names an unambiguous position for validation and conversion. [Month table](https://eclipse.gsfc.nasa.gov/SEhelp/calendars.html)"
                    },
                    {
                        "name": "Civil date validity",
                        "kind": "state",
                        "unit_or_values": "valid; impossible day or month; incomplete; calendar ambiguous; outside supported range",
                        "why_it_matters": "Controls whether an agent can convert a supplied expression or must seek more evidence."
                    },
                    {
                        "name": "Gregorian correspondence discrepancy",
                        "kind": "measurement",
                        "unit_or_values": "signed integer civil days between calculated and supplied Gregorian dates",
                        "why_it_matters": "Exposes inconsistent dual dates and month-boundary mistakes."
                    },
                    {
                        "name": "Application period",
                        "kind": "category",
                        "unit_or_values": "post-adoption use; explicit proleptic calculation; historical calendar identity unresolved",
                        "why_it_matters": "Separates mathematically extending modern rules backwards from interpreting an actual historical record."
                    },
                    {
                        "name": "Official-use evidence",
                        "kind": "state",
                        "unit_or_values": "documented for named institution and period; observed only; unverified; conflicting",
                        "why_it_matters": "Prevents national designation from being treated as proof of a requirement in every workflow."
                    }
                ],
                "affordances": [
                    "Identify a national calendar date while retaining ambiguity when only a Saka year or shared month name is supplied.",
                    "Validate month and day combinations using the applicable Saka year's leap status.",
                    "Convert complete dates to and from Gregorian dates with the rule basis and supported range recorded.",
                    "Check paired Saka and Gregorian dates in a document and flag discrepancies for review.",
                    "Render a verified date using evidenced month-name variants while preserving its calendar and era identity.",
                    "Determine whether a particular official communication supports or requires a national calendar date, using institution-specific evidence."
                ]
            },
            "sources": [
                {
                    "id": "src-1",
                    "title": "Indian national calendar",
                    "url": "https://en.wikipedia.org/wiki/Indian_national_calendar",
                    "what_it_supports": "Definition, month lengths, leap-year rule, 1957 adoption, official uses, and distinction from lunisolar Saka usage.",
                    "url_status": "live"
                }
            ],
            "structure": {
                "bundles": [
                    {
                        "id": "national-calendar-identity",
                        "name": "National calendar identity",
                        "description": "Establish which calendar a name, date or implementation denotes.",
                        "rationale": "Saka numbering and traditional month names are insufficient to distinguish the national calendar from neighbouring systems.",
                        "layers": [
                            {
                                "id": "civil-calendar-recognition",
                                "name": "Civil calendar recognition",
                                "description": "Identify the national civil rule set behind an encountered representation.",
                                "findings": [
                                    {
                                        "id": "national-rules-evidence",
                                        "name": "National rules evidence",
                                        "description": "Record the designation and rule evidence supporting identification, retaining unresolved alternatives.",
                                        "questions": [
                                            {
                                                "text": "What evidence establishes that this representation uses the Indian national civil calendar rather than another Saka-era calendar?",
                                                "kind": "definition",
                                                "id": "national-rules-evidence-q01"
                                            },
                                            {
                                                "text": "Do its year start and month lengths agree with the national rules, or do lunar phases or regional conventions control them?",
                                                "kind": "boundary",
                                                "id": "national-rules-evidence-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "era-and-adoption",
                                "name": "Era and adoption",
                                "description": "Separate inherited year numbering from the modern calendar's introduction.",
                                "findings": [
                                    {
                                        "id": "historical-application-boundary",
                                        "name": "Historical application boundary",
                                        "description": "Record whether a date reflects documented national calendar use, an explicit backward calculation or an unresolved historical convention.",
                                        "questions": [
                                            {
                                                "text": "Which source supports applying the national calendar rules to the document's date and context?",
                                                "kind": "provenance",
                                                "id": "historical-application-boundary-q01"
                                            },
                                            {
                                                "text": "For a date before the 1957 adoption, is this a declared proleptic conversion or an interpretation of an original Saka-era record?",
                                                "kind": "boundary",
                                                "id": "historical-application-boundary-q02"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "saka-year-and-month-rules",
                        "name": "Saka year and month rules",
                        "description": "Capture the decisions that determine valid national calendar dates.",
                        "rationale": "Recognition and safe arithmetic depend on the specific Chaitra leap adjustment and ordered month lengths.",
                        "layers": [
                            {
                                "id": "chaitra-year-boundary",
                                "name": "Chaitra year boundary",
                                "description": "Determine the start and leap class of a specified Saka year.",
                                "findings": [
                                    {
                                        "id": "leap-year-selection",
                                        "name": "Leap-year selection",
                                        "description": "Record the Gregorian anchor year used to evaluate leap status and select the first day of Chaitra.",
                                        "questions": [
                                            {
                                                "text": "Which Gregorian year corresponds to the start of this Saka year, and does it pass the Gregorian leap test including century exceptions?",
                                                "kind": "measurement",
                                                "id": "leap-year-selection-q01"
                                            },
                                            {
                                                "text": "Does that result place Chaitra 1 on March 21 or March 22 and allow or disallow Chaitra 31?",
                                                "kind": "measurement",
                                                "id": "leap-year-selection-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "month-sequence-and-limits",
                                "name": "Month sequence and limits",
                                "description": "Resolve month position and allowed day numbers.",
                                "findings": [
                                    {
                                        "id": "month-day-admissibility",
                                        "name": "Month-day admissibility",
                                        "description": "Assess a supplied date against its resolved month and year class without silently repairing invalid input.",
                                        "questions": [
                                            {
                                                "text": "Where does the resolved month fall in the Chaitra-to-Phalguna sequence, and how many days does it have in this year?",
                                                "kind": "measurement",
                                                "id": "month-day-admissibility-q01"
                                            },
                                            {
                                                "text": "If the day exceeds that limit, should the agent reject it or request correction from the originating record?",
                                                "kind": "action",
                                                "id": "month-day-admissibility-q02"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "gregorian-correspondence",
                        "name": "Gregorian correspondence",
                        "description": "Support conversion and reconciliation across the March year boundary.",
                        "rationale": "The Saka year offset changes within a Gregorian year, making simple year subtraction unsafe.",
                        "layers": [
                            {
                                "id": "date-conversion",
                                "name": "Date conversion",
                                "description": "Establish a complete, reversible correspondence between civil dates.",
                                "findings": [
                                    {
                                        "id": "anchored-date-mapping",
                                        "name": "Anchored date mapping",
                                        "description": "Record the selected Chaitra anchor, elapsed civil days and resulting date in the other calendar.",
                                        "questions": [
                                            {
                                                "text": "Does the Gregorian input fall before or on or after that year's Chaitra 1, and which Saka year follows?",
                                                "kind": "measurement",
                                                "id": "anchored-date-mapping-q01"
                                            },
                                            {
                                                "text": "Does conversion back to the original calendar reproduce the same year, month and day at Chaitra and Phalguna boundaries?",
                                                "kind": "measurement",
                                                "id": "anchored-date-mapping-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "conversion-preconditions",
                                "name": "Conversion preconditions",
                                "description": "Distinguish civil date mapping from instant interpretation and unsupported historical extension.",
                                "findings": [
                                    {
                                        "id": "mapping-readiness",
                                        "name": "Mapping readiness",
                                        "description": "Record missing date components, supported ranges and any external time-zone convention needed before conversion.",
                                        "questions": [
                                            {
                                                "text": "Is the input a complete civil date, or an instant requiring an explicit time zone and day-boundary convention first?",
                                                "kind": "boundary",
                                                "id": "mapping-readiness-q01"
                                            },
                                            {
                                                "text": "When the calendar identity, year or supported historical convention is unresolved, which conversion must remain pending?",
                                                "kind": "action",
                                                "id": "mapping-readiness-q02"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "national-date-expression",
                        "name": "National date expression",
                        "description": "Interpret and produce date labels without losing their calendar identity.",
                        "rationale": "Multilingual spellings and shared Indic month names can make a correctly calculated date ambiguous in use.",
                        "layers": [
                            {
                                "id": "month-name-interpretation",
                                "name": "Month-name interpretation",
                                "description": "Resolve language, script and transliteration variants to national month positions.",
                                "findings": [
                                    {
                                        "id": "evidenced-month-alias",
                                        "name": "Evidenced month alias",
                                        "description": "Preserve the supplied spelling and the evidence for interpreting it as a particular national calendar month.",
                                        "questions": [
                                            {
                                                "text": "Which language-specific or official reference maps this spelling to a national calendar month?",
                                                "kind": "provenance",
                                                "id": "evidenced-month-alias-q01"
                                            },
                                            {
                                                "text": "Could the same label denote a regional lunar month, and what surrounding information resolves that ambiguity?",
                                                "kind": "boundary",
                                                "id": "evidenced-month-alias-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "dual-date-representation",
                                "name": "Dual-date representation",
                                "description": "Keep Saka and Gregorian labels explicit and mutually consistent.",
                                "findings": [
                                    {
                                        "id": "paired-date-integrity",
                                        "name": "Paired date integrity",
                                        "description": "Record which component belongs to each calendar and whether both designate the same civil day.",
                                        "questions": [
                                            {
                                                "text": "Are the national calendar designation, Saka year and Gregorian companion date distinguishable in the document's notation?",
                                                "kind": "definition",
                                                "id": "paired-date-integrity-q01"
                                            },
                                            {
                                                "text": "If the two dates disagree, what evidence determines which value can be corrected and which must remain disputed?",
                                                "kind": "action",
                                                "id": "paired-date-integrity-q02"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "official-application-and-conformance",
                        "name": "Official application and conformance",
                        "description": "Assess the calendar's applicability to a particular publication or workflow.",
                        "rationale": "An agent needs evidence about the receiving institution as well as correct date arithmetic before choosing an official representation.",
                        "layers": [
                            {
                                "id": "institutional-use",
                                "name": "Institutional use",
                                "description": "Record requirements for the named institution, document type and period.",
                                "findings": [
                                    {
                                        "id": "document-specific-applicability",
                                        "name": "Document-specific applicability",
                                        "description": "Distinguish an evidenced dating requirement from an example of use or an unsupported assumption.",
                                        "questions": [
                                            {
                                                "text": "Which dated instruction or publication establishes how this institution uses national calendar dates for this document type?",
                                                "kind": "provenance",
                                                "id": "document-specific-applicability-q01"
                                            },
                                            {
                                                "text": "Does that evidence support a national date alone, a paired Gregorian date or another required presentation?",
                                                "kind": "action",
                                                "id": "document-specific-applicability-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "calendar-output-assurance",
                                "name": "Calendar output assurance",
                                "description": "Evaluate a converter or calendar publication against evidenced civil rules and task boundaries.",
                                "findings": [
                                    {
                                        "id": "civil-rule-conformance",
                                        "name": "Civil rule conformance",
                                        "description": "Record agreement with reference dates and prevent civil calendar correctness from being extended to unrelated holiday or ritual claims.",
                                        "questions": [
                                            {
                                                "text": "Which independently sourced date pairs demonstrate correct behaviour around Chaitra 1, Chaitra 31 and Gregorian century exceptions?",
                                                "kind": "provenance",
                                                "id": "civil-rule-conformance-q01"
                                            },
                                            {
                                                "text": "Does the requested output require a separate holiday declaration or religious calendar calculation beyond national civil date conversion?",
                                                "kind": "boundary",
                                                "id": "civil-rule-conformance-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-kinds",
                                        "name": "Kinds and varieties",
                                        "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.",
                                        "evidence": [
                                            "Official Indian national calendar (Saka Era, civil solar, 1957 reform)",
                                            "Traditional Saka / Shalivahana lunisolar calendars still used regionally",
                                            "Saka year numbering as an era overlay on other Indian calendars"
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-kinds-q01",
                                                "text": "Which of these kinds and varieties hold for the sense of Indian national calendar this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-identifiers",
                                        "name": "Identifiers and schemes",
                                        "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.",
                                        "evidence": [
                                            {
                                                "scheme": "Wikidata",
                                                "value_or_pattern": "Q1134072",
                                                "note": "Item for the Indian national calendar / Saka calendar as a calendar system."
                                            }
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-identifiers-q01",
                                                "text": "Which of these identifiers and schemes hold for the sense of Indian national calendar this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-standards-and-regulation",
                                        "name": "Standards and regulation",
                                        "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.",
                                        "evidence": [
                                            "Calendar Reform Committee report (Government of India, 1955) leading to official adoption from 22 March 1957 / 1 Chaitra 1879 Saka",
                                            "Gazette of India practice: dual Gregorian and Saka dating of official notifications"
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-standards-and-regulation-q01",
                                                "text": "Which of these standards and regulation hold for the sense of Indian national calendar this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-real-world-use",
                                        "name": "Real-world use",
                                        "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.",
                                        "evidence": [
                                            "Printed on the Gazette of India, All India Radio news, and many Government of India communications together with the Gregorian date",
                                            "Used as the civil calendar for some official year-counts (Saka Era) while daily life and most business remain Gregorian"
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-real-world-use-q01",
                                                "text": "Which of these real-world use hold for the sense of Indian national calendar this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-measurements",
                                        "name": "Typical measurements",
                                        "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.",
                                        "evidence": [
                                            {
                                                "quantity": "Months per year",
                                                "typical_range": "12",
                                                "unit": "month"
                                            },
                                            {
                                                "quantity": "Days in Chaitra",
                                                "typical_range": "30 (common year) or 31 (leap year)",
                                                "unit": "day"
                                            },
                                            {
                                                "quantity": "Saka year offset from Common Era",
                                                "typical_range": "Saka year = CE year − 78 (from Chaitra/22 March onward)",
                                                "unit": "year"
                                            }
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-measurements-q01",
                                                "text": "Which of these typical measurements hold for the sense of Indian national calendar this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-failure-modes-and-hazards",
                                        "name": "Failure modes and hazards",
                                        "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.",
                                        "evidence": [
                                            "Confusing the civil Saka calendar with regional Hindu lunisolar calendars that share month names but different new-year and leap rules",
                                            "Off-by-one year errors around 1 January-21 March, when the Saka year has not yet incremented"
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-failure-modes-and-hazards-q01",
                                                "text": "Which of these failure modes and hazards hold for the sense of Indian national calendar this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-regional-variation",
                                        "name": "Regional variation",
                                        "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.",
                                        "evidence": [
                                            "Hindi and other Indian-language official use of Saka month names versus English Gregorian dating in most urban and commercial contexts",
                                            "Southern and eastern India more often use Tamil, Malayalam, Bengali, or other regional calendars rather than the national Saka civil calendar"
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-regional-variation-q01",
                                                "text": "Which of these regional variation hold for the sense of Indian national calendar this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-neighbours",
                                        "name": "Neighbouring kinds and how to tell them apart",
                                        "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.",
                                        "evidence": [
                                            {
                                                "name": "Hindu lunisolar calendar (panchanga)",
                                                "difference": "The national calendar is a fixed solar civil scheme; a panchanga intercalates lunar months and is used for festivals and rites."
                                            },
                                            {
                                                "name": "Vikram Samvat",
                                                "difference": "Vikram Samvat is a different era (about 57 BCE) used in parts of North India and Nepal; Saka Era epoch is 78 CE."
                                            }
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-neighbours-q01",
                                                "text": "Which of these neighbouring kinds and how to tell them apart hold for the sense of Indian national calendar this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    }
                ]
            },
            "openQuestions": [
                "Which original adoption instrument and subsequent instructions establish the exact official-use requirements applicable to each institution and document type?",
                "Which authoritative conventions govern proleptic national calendar dates, year zero and dates before the modern calendar's adoption?",
                "Which official multilingual references settle accepted month spellings and aliases without importing regional calendar meanings?",
                "Which day-boundary and time-zone conventions should govern conversion from instants, especially for records created outside India?",
                "Which authoritative reference date pairs and software documentation establish supported ranges and correct treatment of Gregorian century exceptions?"
            ],
            "statistics": {
                "bundles": 6,
                "layers": 11,
                "findings": 18,
                "questions": 28
            }
        },
        "draft": {
            "generator": "vr.draft.v3",
            "status": "draft-generated",
            "researched": false,
            "archetype": "discipline or field of knowledge",
            "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 Indian national calendar, record what state it is in, and decide what may be done with it.",
            "whatItIs": "Enable an AI agent to recognise the Indian national calendar, assess whether a date or implementation follows its rules, and determine when conversion or official use is justified.",
            "characteristics": {
                "substance": "information",
                "origin": "conceptual",
                "agency": "inert"
            },
            "whatYouCanDoWithIt": [
                "read and interpreted"
            ],
            "distinguishingFeatures": [
                "Described in 64 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 Indian national calendar, and on what evidence are they told apart?"
            ],
            "whatItIsMadeOf": "content that has to be carried by something else",
            "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": [
                "read it and act on what it says"
            ],
            "howItIsRecognised": [],
            "relatedModels": [],
            "standing": "Described in 64 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 Indian national calendar from another, and a Indian national calendar 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 Indian national calendar, 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 Indian national calendar, 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 Indian national calendar 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 Indian national calendar, 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 Indian national calendar, 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 Indian national calendar 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 Indian national calendar 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 Indian national calendar, 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 Indian national calendar, 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 Indian national calendar 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 Indian national calendar from the things most often confused with it.",
                                        "questions": [
                                            {
                                                "id": "distinguishing-features-q01",
                                                "text": "What identifies and describes what distinguishes a Indian national calendar, 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 Indian national calendar, 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 Indian national calendar 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 Indian national calendar 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 Indian national calendar between them.",
                                        "questions": [
                                            {
                                                "id": "stages-and-transitions-q01",
                                                "text": "What identifies and describes the lifecycle of a Indian national calendar, 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 Indian national calendar, 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 Indian national calendar 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 Indian national calendar, how often and by whom.",
                                "findings": [
                                    {
                                        "id": "observation-record",
                                        "name": "Observation record",
                                        "description": "How an observation of a Indian national calendar 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 Indian national calendar, 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 Indian national calendar, 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 Indian national calendar is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "content-and-access",
                        "name": "Content, encoding and access",
                        "description": "What a Indian national calendar says, how it is encoded and who may read it.",
                        "rationale": "An informational thing carries content that can be copied, versioned and withheld, none of which its physical carrier explains.",
                        "layers": [
                            {
                                "id": "content-and-encoding",
                                "name": "Content and encoding",
                                "description": "The content itself, its format and its language.",
                                "findings": [
                                    {
                                        "id": "content-and-format",
                                        "name": "Content, format and language",
                                        "description": "What a Indian national calendar contains and in what form it is held.",
                                        "questions": [
                                            {
                                                "id": "content-and-format-q01",
                                                "text": "What identifies and describes the content of a Indian national calendar, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "content-and-format-q02",
                                                "text": "Who or what asserted this about the content of a Indian national calendar, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "content-and-format-q03",
                                                "text": "What may an agent decide or do once the content of a Indian national calendar is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "access-and-rights",
                                "name": "Access, rights and retention",
                                "description": "Who may read, copy or change it, and for how long it is kept.",
                                "findings": [
                                    {
                                        "id": "access-rules",
                                        "name": "Access rules and retention",
                                        "description": "The permissions attached to a Indian national calendar and the period it survives.",
                                        "questions": [
                                            {
                                                "id": "access-rules-q01",
                                                "text": "What identifies and describes access to a Indian national calendar, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "access-rules-q02",
                                                "text": "Who or what asserted this about access to a Indian national calendar, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "access-rules-q03",
                                                "text": "What may an agent decide or do once access to a Indian national calendar is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "subject-and-method",
                        "name": "Subject matter and method",
                        "description": "What Indian national calendar studies and how it establishes anything.",
                        "rationale": "A field is identified by its questions and its methods, and those are what distinguish it from the fields next to it.",
                        "layers": [
                            {
                                "id": "subject",
                                "name": "Subject matter",
                                "description": "The questions it takes as its own.",
                                "findings": [
                                    {
                                        "id": "subject-record",
                                        "name": "Questions and objects of study",
                                        "description": "What it is about, stated so a neighbouring field can be told apart.",
                                        "questions": [
                                            {
                                                "id": "subject-record-q01",
                                                "text": "What questions and objects does Indian national calendar take as its own?",
                                                "kind": "definition"
                                            },
                                            {
                                                "id": "subject-record-q02",
                                                "text": "Which questions does it share with a neighbouring field, and who claims them?",
                                                "kind": "boundary"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "method",
                                "name": "Method and evidence",
                                "description": "How claims are established and what counts as evidence.",
                                "findings": [
                                    {
                                        "id": "method-record",
                                        "name": "Methods and standards of evidence",
                                        "description": "The methods used and what they are taken to establish.",
                                        "questions": [
                                            {
                                                "id": "method-record-q01",
                                                "text": "By what methods does Indian national calendar establish claims, and what counts as sufficient evidence?",
                                                "kind": "provenance"
                                            },
                                            {
                                                "id": "method-record-q02",
                                                "text": "What kind of claim can this field not settle, and where should an agent look instead?",
                                                "kind": "action"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "institutions-and-classification",
                        "name": "Institutions and classification",
                        "description": "Where Indian national calendar is practised and how catalogues place it.",
                        "rationale": "The institutional footprint is the evidence that a field exists as a field rather than as a topic.",
                        "layers": [
                            {
                                "id": "institutions",
                                "name": "Institutional markers",
                                "description": "Societies, journals, degrees and departments.",
                                "findings": [
                                    {
                                        "id": "institution-record",
                                        "name": "Bodies and venues",
                                        "description": "Where the field organises itself.",
                                        "questions": [
                                            {
                                                "id": "institution-record-q01",
                                                "text": "Which societies, journals or degrees mark Indian national calendar as an established field?",
                                                "kind": "provenance"
                                            },
                                            {
                                                "id": "institution-record-q02",
                                                "text": "What would show that it is emerging or dissolving rather than established?",
                                                "kind": "boundary"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "classification",
                                "name": "Classification schemes",
                                "description": "Where library and research classifications put it.",
                                "findings": [
                                    {
                                        "id": "classification-record",
                                        "name": "Codes and their disagreements",
                                        "description": "The classification codes that place it, and where they differ.",
                                        "questions": [
                                            {
                                                "id": "classification-record-q01",
                                                "text": "Which classification schemes place Indian national calendar, under what codes?",
                                                "kind": "definition"
                                            },
                                            {
                                                "id": "classification-record-q02",
                                                "text": "Where do those schemes disagree about its scope?",
                                                "kind": "boundary"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "provenance-and-evidence",
                        "name": "Provenance, evidence and time",
                        "description": "Where every claim about a Indian national calendar 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 Indian national calendar and how confident it is.",
                                        "questions": [
                                            {
                                                "id": "claim-provenance-q01",
                                                "text": "What identifies and describes a claim about a Indian national calendar, 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 Indian national calendar, 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 Indian national calendar 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 Indian national calendar is retired without being erased.",
                                        "questions": [
                                            {
                                                "id": "validity-and-supersession-q01",
                                                "text": "What identifies and describes the validity of a claim about a Indian national calendar, 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 Indian national calendar, 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 Indian national calendar is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    }
                ]
            },
            "statistics": {
                "bundles": 6,
                "layers": 12,
                "findings": 14,
                "questions": 38
            }
        }
    }
}