{ "vercy": "1.0-draft", "publication": { "status": "research-draft", "adjudicationStatus": "unreviewed", "publishableCanonical": false, "generatedAt": "2026-09-12T10:45:24Z", "providers": [ "Codex" ], "breadth": "recalled by Codex without web access - no source was read", "missingProviders": [], "pass": 2, "cost": { "grok": { "seconds": 17.2, "error": "Reading additional input from stdin...\nOpenAI Codex v0.153.4\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: 01a09537-ca5a-7800-a40a-5e01ead8bb7d\n--------\nuser\nDescribe what is already known about one registered thing. Answer as JSON only, no prose around it.\n\nThing: khol\nSense to describe: (none recorded)\nDomain code: PHY.OBJ\nAlso known as: (none)\n\n\nContext for this batch of 1001 things:\n# Batch 043: 1001 registered", "usd": 0.0, "recall": true }, "codex": { "seconds": 68.0, "error": "Reading additional input from stdin...\nOpenAI Codex v0.153.4\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: 01a09537-ca5c-7e03-be24-691bf4591992\n--------\nuser\nYou are drafting a Vercy meta-model for one registered thing. Answer as JSON only, no prose around it.\n\nThing: khol\nRegistry id: vr.tr.khol\nPlane / domain: PHY / PHY.OBJ\nRegistry definition: (none recorded)\nNames folded into this entry: (none)\n\n\nContext for th" } }, "enrichment": { "pass": 3, "engine": "claude", "producedAt": "2026-10-06T12:00:00Z", "ingestedAt": "2026-10-06T08:54:24+00:00", "fields": [ "agent_conduct", "ethics", "failure_modes_and_hazards", "owners", "visual_identification" ] }, "gate": { "passed": true, "version": "1.0", "at": "2026-10-07T10:10:26+00:00", "evidence": [ "completeness 1.00", "sense: Wikidata description", "2 live sources", "review by codex: pass" ] } }, "metaModel": { "id": "THING-Q1436500", "registryId": "vr.tr.khol", "name": "khol", "version": "0.1.0-research.1", "entryKind": "thing", "family": "Thing Registry", "domain": [ "PHY.OBJ" ], "status": "research-draft" }, "canonicalUrl": "https://ver.cy/models/thing/q1436500/", "model": { "registry_id": "vr.tr.khol", "name": "khol", "purpose": "Enable an agent to recognise a khol drum, assess its playing condition, and select suitable handling, tuning and maintenance actions.", "definition": "A khol is a double-headed hand drum of eastern South Asia, traditionally made with a hollow terracotta body and unequal-sized membrane heads, used especially to accompany devotional singing.", "scope_statement": "This draft models vr.tr.khol as the musical instrument kind: a double-headed drum with markedly unequal playing heads, including construction variants supported by identification evidence; the registry's intended referent still requires confirmation.", "in_scope": [ "Identification through shell profile, unequal heads and documented instrument naming", "Shell, membranes, tuning paste and head-tensioning construction", "Separate bass and treble responses under specified playing conditions", "Playing orientation, support and carrying arrangements", "Condition assessment, tuning suitability and repair requirements" ], "out_of_scope": [ "Kohl eye cosmetic and other similarly spelled substances", "Mridangam, pakhawaj, dhol and other neighbouring drum kinds", "Kirtan compositions, rhythmic systems and performance events", "Religious institutions, beliefs and ritual systems", "Individual instrument inventories and manufacturer product catalogues" ], "distinguishing_features": [ "Check for two membranes closing opposite ends of one resonating shell; a pair of separate drums does not meet this structural test.", "Look for pronounced inequality between the small treble head and larger bass head, together with the characteristic tapered body.", "Combine physical inspection with maker, collection or practitioner identification; the name 'mridanga' alone is insufficient to resolve neighbouring drum kinds.", "Do not make clay construction mandatory: a museum-catalogued khol has a wooden body. [Metropolitan Museum of Art](https://www.metmuseum.org/art/collection/search/503302)", "Check that sound is generated through played membranes; a sample library or electronic imitation belongs to a neighbouring model." ], "characteristics": [ { "name": "Identification basis", "kind": "relation", "unit_or_values": "Link to maker statement, collection record or practitioner assessment", "why_it_matters": "Separates supported khol identification from a resemblance or ambiguous name." }, { "name": "Shell material", "kind": "category", "unit_or_values": "Terracotta; wood; composite; metal; other documented material; unknown", "why_it_matters": "Determines which handling and repair procedures need investigation." }, { "name": "Shell geometry", "kind": "measurement", "unit_or_values": "Length and maximum body diameter in mm; profile description", "why_it_matters": "Supports recognition, case selection and comparison between variants." }, { "name": "Head diameters", "kind": "measurement", "unit_or_values": "Small and large playing-surface diameters in mm, with measurement convention", "why_it_matters": "Records asymmetry and helps identify compatible replacement heads." }, { "name": "Membrane and loading construction", "kind": "category", "unit_or_values": "Per head: membrane material, layering and tuning-paste presence; unknown where unverified", "why_it_matters": "Prevents applying one head's treatment to a differently constructed head." }, { "name": "Tensioning arrangement", "kind": "category", "unit_or_values": "Lacing; mechanical adjusters; other documented arrangement; unknown", "why_it_matters": "Determines how adjustment is possible and whether the heads interact." }, { "name": "Head response", "kind": "measurement", "unit_or_values": "Per specified stroke: dominant frequency in Hz where identifiable and decay time in s", "why_it_matters": "Makes tonal comparisons meaningful without assuming every stroke has one definite pitch." }, { "name": "Playing condition", "kind": "state", "unit_or_values": "Untested; playable; restricted use; repair required; conservation only", "why_it_matters": "Connects observed shell, head and fastening condition to permitted actions." }, { "name": "Playing support", "kind": "category", "unit_or_values": "Lap; cushion; carrying strap; other documented support", "why_it_matters": "Supports a setup that leaves both heads accessible and the body secure." }, { "name": "Use-tradition attribution", "kind": "relation", "unit_or_values": "Named tradition or community with supporting evidence", "why_it_matters": "Keeps repertoire suitability and handling expectations attached to their actual context." } ], "affordances": [ "Identify a candidate khol and record unresolved naming or construction evidence.", "Compare head dimensions and fastening arrangements before selecting replacement components.", "Document bass and treble responses using repeatable, condition-appropriate strokes.", "Select a supported playing orientation with access to both heads.", "Determine whether tuning, specialist repair or suspension of playing is appropriate.", "Prepare packing and storage requirements from the instrument's actual materials and condition." ], "agent_conduct": { "may": [ "Describe the khol, its construction and its role in devotional music from reputable sources.", "Help a user learn, maintain or record it." ], "must_not": [ "Mock or misrepresent the devotional singing it accompanies.", "Present a fibreglass or modern drum as a traditional clay one.", "Help trade instruments with skins from protected species in breach of the law." ], "requires_human": [ "Using it in a religious setting or ceremony on a community's behalf." ] }, "ethics": { "considerations": [ "It is tied to devotional practice; respect for worship matters.", "Skin heads raise animal welfare and legal questions." ], "affected_parties": [ "Devotional communities", "Players", "Buyers" ] }, "owners": { "steward": "The person who owns and plays it.", "master_systems": [] }, "visual_identification": [ "A long barrel-shaped drum with a small head at one end and a larger head at the other.", "Terracotta body laced with leather straps, played horizontally with both hands." ], "failure_modes_and_hazards": [ "The clay body breaks easily if dropped." ], "what_it_is_for": [ "The khol accompanies devotional singing and ensemble music, especially in eastern South Asian traditions.", "Players strike its unequal heads with their hands to produce contrasting tones and rhythmic patterns." ], "facets_not_applicable": { "interfaces": "No specific universal standard, law or official classification is applicable to the khol solely as this traditional drum type." } }, "sources": [ { "id": "wikidata", "title": "Wikidata item Q1436500: khol", "url": "https://www.wikidata.org/wiki/Q1436500", "url_status": "live", "what_it_supports": "identity and sense of the item", "checked_by": "wikidata-api" }, { "id": "wikipedia-en", "title": "Wikipedia: Khol", "url": "https://en.wikipedia.org/wiki/Khol", "url_status": "live", "what_it_supports": "general description of the item", "checked_by": "wikidata-api sitelink" } ], "structure": { "bundles": [ { "id": "identity-and-tradition", "name": "Identity and tradition", "description": "Establish which instrument the khol name denotes and how regional naming affects recognition.", "rationale": "The registry supplies no definition, and related drum names can overlap.", "layers": [ { "id": "structural-identification", "name": "Structural identification", "description": "Connect the khol label to observable construction.", "findings": [ { "id": "double-headed-body", "name": "Double-headed body", "description": "A museum record classifies a khol as a double-headed, biconical membranophone; use this as identification evidence rather than a complete acceptance rule. [Metropolitan Museum of Art](https://www.metmuseum.org/art/collection/search/503302)", "questions": [ { "text": "Does the candidate have a single tapered resonating body with two markedly unequal playing heads?", "kind": "definition", "id": "double-headed-body-q01" }, { "text": "Which physical and documentary evidence distinguishes it from a mridangam, pakhawaj or dhol?", "kind": "boundary", "id": "double-headed-body-q02" } ] } ] }, { "id": "names-and-use-context", "name": "Names and use context", "description": "Record attributed names and musical associations without making one use compulsory.", "findings": [ { "id": "documented-context", "name": "Documented context", "description": "The Met associates khol with eastern India, Bangladesh and Vaishnava kirtan accompaniment; individual attributions require their own evidence. [Metropolitan Museum of Art](https://www.metmuseum.org/art/collection/search/503302)", "questions": [ { "text": "Who identifies this instrument as khol, and what locality or playing tradition supports that name?", "kind": "provenance", "id": "documented-context-q01" }, { "text": "When a source calls it mridanga, what confirms that it refers to this registry kind?", "kind": "boundary", "id": "documented-context-q02" } ] } ] } ] }, { "id": "shell-and-head-assembly", "name": "Shell and head assembly", "description": "Describe the interacting parts that produce the khol's two playing surfaces.", "rationale": "Material, head construction and fastening differences determine component compatibility and intervention choices.", "layers": [ { "id": "resonating-shell", "name": "Resonating shell", "description": "Record profile, dimensions and material independently of assumptions about traditional construction.", "findings": [ { "id": "material-sensitive-recognition", "name": "Material-sensitive recognition", "description": "Wood is documented in a museum khol, so shell material must be recorded rather than inferred from the instrument name. [Metropolitan Museum of Art](https://www.metmuseum.org/art/collection/search/503302)", "questions": [ { "text": "What evidence establishes the shell material beneath any paint or covering?", "kind": "provenance", "id": "material-sensitive-recognition-q01" }, { "text": "What are the shell length, maximum diameter and opening diameters in millimetres?", "kind": "measurement", "id": "material-sensitive-recognition-q02" } ] } ] }, { "id": "membranes-and-fastening", "name": "Membranes and fastening", "description": "Describe each head and its connection to the tensioning system.", "findings": [ { "id": "head-specific-construction", "name": "Head-specific construction", "description": "A practitioner guide describes skin heads, tuning paste and lacing, alongside synthetic-head variants with mechanical adjustment. Record the actual assembly. [Khol instructional guide](https://kksongs.org/khol/chapters/lesson01.html)", "questions": [ { "text": "What membrane, rim and loading-paste construction is present on each head?", "kind": "definition", "id": "head-specific-construction-q01" }, { "text": "Which dimensions and fastening details must match before a replacement head can be fitted?", "kind": "action", "id": "head-specific-construction-q02" } ] } ] } ] }, { "id": "playing-and-tonal-response", "name": "Playing and tonal response", "description": "Relate the unequal heads, player orientation and tuning arrangement to observable sound.", "rationale": "A khol's readiness depends on usable responses from both heads, not merely intact appearance.", "layers": [ { "id": "head-roles-and-support", "name": "Head roles and support", "description": "Identify playing surfaces without confusing their names with fixed physical left and right.", "findings": [ { "id": "orientation-independent-head-roles", "name": "Orientation-independent head roles", "description": "The instructional guide distinguishes the small treble head and larger bass head and discusses seated and standing setups. [Khol instructional guide](https://kksongs.org/khol/chapters/lesson01.html)", "questions": [ { "text": "Which head serves each tonal role, and what local names does the player use?", "kind": "definition", "id": "orientation-independent-head-roles-q01" }, { "text": "Which orientation and support give the player access to both heads without unstable loading?", "kind": "action", "id": "orientation-independent-head-roles-q02" } ] } ] }, { "id": "response-and-adjustment", "name": "Response and adjustment", "description": "Establish repeatable listening checks and construction-specific tuning decisions.", "findings": [ { "id": "repeatable-tonal-assessment", "name": "Repeatable tonal assessment", "description": "Record stroke location, damping, test conditions and intended musical use before judging pitch, sustain or unwanted noise.", "questions": [ { "text": "What response does each head produce under an identified open and damped stroke?", "kind": "measurement", "id": "repeatable-tonal-assessment-q01" }, { "text": "What target response and adjustment procedure does a qualified player or maker specify for this assembly?", "kind": "action", "id": "repeatable-tonal-assessment-q02" } ] } ] } ] }, { "id": "condition-and-care", "name": "Condition and care", "description": "Assess damage and select care actions for the particular shell and head materials.", "rationale": "Damage to a shell, membrane or tensioning assembly can change both playability and the suitability of further handling.", "layers": [ { "id": "damage-and-playability", "name": "Damage and playability", "description": "Locate defects before using sound tests or tension adjustments.", "findings": [ { "id": "component-condition-assessment", "name": "Component condition assessment", "description": "Inspect shell cracks, membrane tears, detached loading paste and compromised fastenings separately; record whether playing is appropriate.", "questions": [ { "text": "Where are cracks, tears, paste losses or fastening defects, and how extensive are they?", "kind": "measurement", "id": "component-condition-assessment-q01" }, { "text": "Which observed defects require stopping play or obtaining specialist assessment before tension changes?", "kind": "action", "id": "component-condition-assessment-q02" } ] } ] }, { "id": "environment-and-intervention", "name": "Environment and intervention", "description": "Connect transport, storage and repair choices to material sensitivity.", "findings": [ { "id": "material-specific-care", "name": "Material-specific care", "description": "The practitioner guide reports environmental sensitivity of skin heads and breakage vulnerability of clay bodies. Establish care requirements for the actual instrument. [Khol instructional guide](https://kksongs.org/khol/chapters/lesson01.html)", "questions": [ { "text": "What storage and transport requirements does the maker or conservator specify for this shell and these heads?", "kind": "action", "id": "material-specific-care-q01" }, { "text": "What repairs or replacements have changed the shell, membranes, paste or tensioning arrangement?", "kind": "provenance", "id": "material-specific-care-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-confidence-notes", "name": "Check these first", "description": "Recalled without web access and unsourced; every item is a lead to verify.", "evidence": [ "No sense was supplied; the musical-instrument interpretation should be confirmed against the registry's originating record.", "Dimensions, tuning practices and modern body materials vary; no numerical ranges or formal varieties are asserted.", "Mridanga and related spellings can name the khol in some traditions, so terminology alone does not reliably distinguish neighbouring drum types." ], "questions": [ { "id": "evidence-confidence-notes-q01", "text": "Which of these check these first hold for the sense of khol this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-real-world-use", "name": "Real-world use", "description": "Recalled without web access and unsourced; every item is a lead to verify.", "evidence": [ "Accompanying Bengali Vaishnava kirtan.", "Accompanying Assamese devotional singing and performance.", "Providing contrasting bass and treble strokes in rhythmic accompaniment." ], "questions": [ { "id": "evidence-real-world-use-q01", "text": "Which of these real-world use hold for the sense of khol this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-failure-modes-and-hazards", "name": "Failure modes and hazards", "description": "Recalled without web access and unsourced; every item is a lead to verify.", "evidence": [ "A terracotta body can crack or shatter under impact.", "Membrane heads can tear or deteriorate.", "Humidity and temperature changes can affect membrane tension and tuning.", "Lacing or other tensioning components can loosen or fail." ], "questions": [ { "id": "evidence-failure-modes-and-hazards-q01", "text": "Which of these failure modes and hazards hold for the sense of khol this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-regional-variation", "name": "Regional variation", "description": "Recalled without web access and unsourced; every item is a lead to verify.", "evidence": [ "Bengali and Assamese traditions have distinct playing techniques, rhythmic repertoires and performance contexts." ], "questions": [ { "id": "evidence-regional-variation-q01", "text": "Which of these regional variation hold for the sense of khol this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-neighbours", "name": "Neighbouring kinds and how to tell them apart", "description": "Recalled without web access and unsourced; every item is a lead to verify.", "evidence": [ { "name": "mridangam", "difference": "The Carnatic mridangam normally has a wooden body and belongs to a different construction and performance tradition; the khol traditionally has a terracotta body with markedly unequal heads." }, { "name": "pakhawaj", "difference": "The pakhawaj is a wooden barrel drum associated especially with Hindustani dhrupad; the khol has a different body profile, head proportions and devotional performance tradition." }, { "name": "kohl", "difference": "Kohl is an eye cosmetic; khol here is interpreted as the musical instrument." } ], "questions": [ { "id": "evidence-neighbours-q01", "text": "Which of these neighbouring kinds and how to tell them apart hold for the sense of khol this model covers, and on what evidence?", "kind": "provenance" } ] } ] } ] } ] }, "openQuestions": [ "Does the registry's original source identifier confirm that khol denotes the musical instrument?", "Which regional khol forms belong within this entry, and where do local uses of mridanga designate a neighbouring instrument?", "What evidence supports inclusion of composite and metal variants without creating unsupported registry subdivisions?", "Which head dimensions, tonal targets and tuning procedures are documented for particular construction traditions?", "What maker or conservation guidance establishes suitable environmental limits, repair materials and intervention thresholds?" ], "statistics": { "bundles": 5, "layers": 9, "findings": 13, "questions": 21 } }