{
    "model": {
        "rank": 3726,
        "code": "thing-q128309",
        "model_id": "vr.tr.drum-kit",
        "name": "drum kit",
        "purpose": "Enable an AI agent to recognise a drum kit, describe its playable configuration, assess its condition and determine suitable setup, playing and maintenance actions.",
        "family": "Thing Registry",
        "category": "Physical world and living systems",
        "status": "research-draft",
        "kind": "thing",
        "plane": "PHY",
        "domain": "PHY.OBJ",
        "industry": "",
        "version": "",
        "url": "/models/thing/q128309/",
        "tier": 2,
        "score": 82,
        "payload": {
            "layer": "wikidata",
            "aliases": [
                "Yamaha Hipgig",
                "Vistalite Drums",
                "cocktail drum",
                "Bombo de batería",
                "North Drums",
                "Ludwig Amber Vistalite"
            ],
            "aliasCount": 6,
            "merged": 6,
            "knownIn": 82,
            "facets": null,
            "markers": [],
            "lexicalClass": "",
            "senseRank": null,
            "alsoRegisteredAs": null,
            "source": {
                "dataset": "wikidata",
                "item": "Q128309",
                "url": "https://www.wikidata.org/wiki/Q128309",
                "license": "CC0 1.0"
            }
        },
        "research": {
            "vercy": "1.0-draft",
            "publication": {
                "status": "research-draft",
                "adjudicationStatus": "unreviewed",
                "publishableCanonical": false,
                "generatedAt": "2026-09-07T15:00:39Z",
                "providers": [
                    "Codex"
                ],
                "breadth": "recalled by Codex without web access - no source was read",
                "missingProviders": [],
                "pass": 2,
                "cost": {
                    "grok": {
                        "seconds": 22.3,
                        "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: 01a07c61-84f6-7470-a9df-e7dd0212518e\n--------\nuser\nDescribe what is already known about one registered thing. Answer as JSON only, no prose around it.\n\nThing: drum kit\nSense to describe: (none recorded)\nDomain code: PHY.OBJ\nAlso known as: (none)\n\n\nContext for this batch of 801 things:\n# Batch 004: 1001 registe",
                        "usd": 0,
                        "recall": true
                    },
                    "codex": {
                        "seconds": 79,
                        "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: 01a07c61-8509-74e3-835d-7caa8eb9c991\n--------\nuser\nYou are drafting a Vercy meta-model for one registered thing. Answer as JSON only, no prose around it.\n\nThing: drum kit\nRegistry id: vr.tr.drum-kit\nPlane / domain: PHY / PHY.OBJ\nRegistry definition: (none recorded)\nNames folded into this entry: (none)\n\n\nContex"
                    }
                }
            },
            "metaModel": {
                "id": "THING-Q128309",
                "registryId": "vr.tr.drum-kit",
                "name": "drum kit",
                "version": "0.1.0-research.1",
                "entryKind": "thing",
                "family": "Thing Registry",
                "domain": [
                    "PHY.OBJ"
                ],
                "status": "research-draft"
            },
            "canonicalUrl": "https://ver.cy/models/thing/q128309/",
            "model": {
                "registry_id": "vr.tr.drum-kit",
                "name": "drum kit",
                "purpose": "Enable an AI agent to recognise a drum kit, describe its playable configuration, assess its condition and determine suitable setup, playing and maintenance actions.",
                "definition": "A drum kit is an arrangement of drums, cymbals and associated hardware configured for one musician to play with hands and feet, typically using sticks and pedals to produce coordinated rhythmic patterns.",
                "scope_statement": "This model owns the drum kit as a coordinated percussion instrument arranged for one player, including acoustic, electronic and hybrid configurations; it distinguishes the registered kind from product models and individual assembled kits.",
                "in_scope": [
                    "Membership and arrangement of drums, cymbals, pads and auxiliary percussion in a playable kit",
                    "Stands, mounts, pedals, throne and connections that support coordinated playing",
                    "Acoustic sound production, electronic triggering and hybrid signal paths",
                    "Tuning, sound selection, damping and playing response",
                    "Kit-level readiness, condition, maintenance and setup constraints"
                ],
                "out_of_scope": [
                    "Standalone drums, cymbals and percussion instruments except their roles within the kit",
                    "Drumming technique, compositions, notation and performances",
                    "General-purpose public-address systems, recording equipment and room acoustics",
                    "Manufacturer product catalogues and commercial inventory records",
                    "Virtual drum software without a physical playable kit",
                    "Percussion ensembles distributed across multiple players"
                ],
                "distinguishing_features": [
                    "Multiple percussion voices are arranged as one instrument for a single player's coordinated use, rather than merely stored or sold together.",
                    "Its layout supports repeated access to distinct voices using hand strikes and, where fitted, foot-operated controls.",
                    "A conventional configuration combines bass-drum, snare, tom and cymbal roles; departures must be recorded without assuming a fixed component count.",
                    "An electronic kit provides physical percussion playing surfaces and a triggering path; a sequencer or sample library alone does not establish a physical drum kit.",
                    "A hybrid kit integrates acoustic and electronic elements into the same playing arrangement rather than merely placing unrelated instruments nearby."
                ],
                "characteristics": [
                    {
                        "name": "Sound-production configuration",
                        "kind": "category",
                        "unit_or_values": "acoustic | electronic | hybrid",
                        "why_it_matters": "Determines whether readiness depends on acoustic components, electronic signal paths or both."
                    },
                    {
                        "name": "Installed percussion roles",
                        "kind": "relation",
                        "unit_or_values": "Components mapped to bass-drum, snare, tom, hi-hat, other cymbal and auxiliary roles",
                        "why_it_matters": "Describes playable capability without treating a conventional layout as mandatory."
                    },
                    {
                        "name": "Counting convention",
                        "kind": "category",
                        "unit_or_values": "Declared drum-only piece count, pad count and separate cymbal count",
                        "why_it_matters": "Prevents an ambiguous advertised piece count from being mistaken for total kit membership."
                    },
                    {
                        "name": "Drum dimensions",
                        "kind": "measurement",
                        "unit_or_values": "Diameter and depth per drum, in mm or inches with the unit declared",
                        "why_it_matters": "Supports head selection, component identification and clearance planning."
                    },
                    {
                        "name": "Playable footprint",
                        "kind": "measurement",
                        "unit_or_values": "Width and depth in m, including throne position and operating clearance",
                        "why_it_matters": "Determines whether the assembled kit can be played in the available space."
                    },
                    {
                        "name": "Player layout",
                        "kind": "category",
                        "unit_or_values": "Right-oriented | left-oriented | open-handed | custom, with actual component positions",
                        "why_it_matters": "Supports repeatable setup while avoiding assumptions about the player's handedness or technique."
                    },
                    {
                        "name": "Pedal and controller configuration",
                        "kind": "relation",
                        "unit_or_values": "Bass-drum pedals, beaters and hi-hat mechanisms or controllers mapped to their targets",
                        "why_it_matters": "Identifies foot-operated capabilities and their mechanical or electronic dependencies."
                    },
                    {
                        "name": "Acoustic setup",
                        "kind": "state",
                        "unit_or_values": "Installed heads, tuning reference, damping and snare-wire engagement per applicable drum",
                        "why_it_matters": "Makes the kit's intended acoustic response reproducible."
                    },
                    {
                        "name": "Electronic voice mapping",
                        "kind": "relation",
                        "unit_or_values": "Pad zones and controllers mapped to trigger inputs, assigned voices and outputs",
                        "why_it_matters": "Distinguishes what is struck from the sound or control event it produces."
                    },
                    {
                        "name": "Playing readiness",
                        "kind": "state",
                        "unit_or_values": "Unchecked | ready | playable with limitations | unavailable, with component-specific reasons",
                        "why_it_matters": "Allows an agent to judge whether a particular use is feasible."
                    }
                ],
                "affordances": [
                    "Assemble and position percussion voices for a specified player and available space.",
                    "Check whether the installed drums, cymbals and controllers support a requested playing arrangement.",
                    "Tune and damp acoustic drums or select and calibrate electronic voices.",
                    "Test pedal travel, striking response, trigger behaviour and audible output.",
                    "Identify worn heads, damaged cymbals, loose mounts and faulty connections for maintenance.",
                    "Document an arrangement for transport, reassembly or another player's use."
                ]
            },
            "sources": [],
            "structure": {
                "bundles": [
                    {
                        "id": "kit-identity-and-membership",
                        "name": "Kit identity and membership",
                        "description": "Establishes what makes the assembly a drum kit and which percussion roles it contains.",
                        "rationale": "A kit is a variable assembly, so neither a product name nor a piece count adequately defines its playable contents.",
                        "layers": [
                            {
                                "id": "instrument-boundary",
                                "name": "Instrument boundary",
                                "description": "Separates the coordinated instrument from component collections and neighbouring instrument types.",
                                "findings": [
                                    {
                                        "id": "single-player-percussion-assembly",
                                        "name": "Single-player percussion assembly",
                                        "description": "Record how the components form one playable arrangement and whether acoustic, electronic or hybrid operation is intended.",
                                        "questions": [
                                            {
                                                "text": "What arrangement and intended use establish this assembly as a drum kit rather than a collection of percussion instruments?",
                                                "kind": "definition",
                                                "id": "single-player-percussion-assembly-q01"
                                            },
                                            {
                                                "text": "Which attached accessories belong to the kit, and which are external monitoring, recording or stage equipment?",
                                                "kind": "boundary",
                                                "id": "single-player-percussion-assembly-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "percussion-role-inventory",
                                "name": "Percussion role inventory",
                                "description": "Records installed voices and explains component counts.",
                                "findings": [
                                    {
                                        "id": "components-and-counting",
                                        "name": "Components and counting",
                                        "description": "Map each drum, cymbal or pad to its playing role while keeping the counting convention explicit.",
                                        "questions": [
                                            {
                                                "text": "Which physical components provide bass-drum, snare, tom, hi-hat, other cymbal and auxiliary voices?",
                                                "kind": "definition",
                                                "id": "components-and-counting-q01"
                                            },
                                            {
                                                "text": "What does the stated piece count include, and which cymbals, pads or accessories are counted separately?",
                                                "kind": "measurement",
                                                "id": "components-and-counting-q02"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "layout-and-player-interface",
                        "name": "Layout and player interface",
                        "description": "Describes the spatial and mechanical arrangement through which one player operates the kit.",
                        "rationale": "A complete component inventory can still describe an unplayable kit if reach, pedal movement or support is inadequate.",
                        "layers": [
                            {
                                "id": "seated-reach-and-clearance",
                                "name": "Seated reach and clearance",
                                "description": "Relates percussion positions to the player's seating and movement.",
                                "findings": [
                                    {
                                        "id": "playable-arrangement",
                                        "name": "Playable arrangement",
                                        "description": "Record throne position, striking-surface placement and the clearance needed for hands, sticks and feet.",
                                        "questions": [
                                            {
                                                "text": "What are the heights, angles and positions of the principal striking surfaces relative to the throne?",
                                                "kind": "measurement",
                                                "id": "playable-arrangement-q01"
                                            },
                                            {
                                                "text": "Which positions need adjustment to let the intended player reach the voices without collisions or restricted movement?",
                                                "kind": "action",
                                                "id": "playable-arrangement-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "pedals-and-supports",
                                "name": "Pedals and supports",
                                "description": "Covers foot controls and the hardware that holds the playing arrangement in place.",
                                "findings": [
                                    {
                                        "id": "mechanical-control-and-stability",
                                        "name": "Mechanical control and stability",
                                        "description": "Record bass-drum pedal and hi-hat operation alongside stand, rack, clamp and throne stability.",
                                        "questions": [
                                            {
                                                "text": "Which pedals and controllers are installed, and do their travel paths clear neighbouring hardware?",
                                                "kind": "boundary",
                                                "id": "mechanical-control-and-stability-q01"
                                            },
                                            {
                                                "text": "What adjustments or repairs are required when pedals bind, drums creep or supports move during playing?",
                                                "kind": "action",
                                                "id": "mechanical-control-and-stability-q02"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "acoustic-voices-and-adjustment",
                        "name": "Acoustic voices and adjustment",
                        "description": "Captures the configuration and adjustment of acoustic drums and cymbals where present.",
                        "rationale": "Head selection, snare engagement, damping and cymbal mounting materially affect how an acoustic or hybrid kit responds.",
                        "layers": [
                            {
                                "id": "drum-heads-and-tuning",
                                "name": "Drum heads and tuning",
                                "description": "Records drum dimensions and the head configuration used to obtain the intended response.",
                                "findings": [
                                    {
                                        "id": "head-fit-and-response",
                                        "name": "Head fit and response",
                                        "description": "Describe batter and resonant heads where fitted, tuning references and damping without prescribing a universal pitch.",
                                        "questions": [
                                            {
                                                "text": "What are each drum's diameter and depth, and which batter and resonant heads are installed?",
                                                "kind": "measurement",
                                                "id": "head-fit-and-response-q01"
                                            },
                                            {
                                                "text": "What tuning reference and damping arrangement should be reproduced for the intended sound?",
                                                "kind": "action",
                                                "id": "head-fit-and-response-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "snare-and-cymbal-response",
                                "name": "Snare and cymbal response",
                                "description": "Records the mechanisms and mounting choices that shape snare and cymbal behaviour.",
                                "findings": [
                                    {
                                        "id": "engagement-and-free-movement",
                                        "name": "Engagement and free movement",
                                        "description": "Capture snare-wire engagement and tension, hi-hat closure and cymbal mounting conditions.",
                                        "questions": [
                                            {
                                                "text": "How are snare-wire engagement, hi-hat opening and cymbal movement currently configured?",
                                                "kind": "measurement",
                                                "id": "engagement-and-free-movement-q01"
                                            },
                                            {
                                                "text": "Which adjustment is needed when snare response, hi-hat closure or cymbal movement differs from the intended behaviour?",
                                                "kind": "action",
                                                "id": "engagement-and-free-movement-q02"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "electronic-and-hybrid-operation",
                        "name": "Electronic and hybrid operation",
                        "description": "Describes physical triggering, sound assignment and output dependencies where electronics are installed.",
                        "rationale": "Electronic and hybrid kits require a working relationship between playing surfaces, controllers and sound generation that an acoustic inventory cannot express.",
                        "layers": [
                            {
                                "id": "trigger-and-controller-mapping",
                                "name": "Trigger and controller mapping",
                                "description": "Maps strike zones and continuous or switched controls to supported inputs.",
                                "findings": [
                                    {
                                        "id": "input-compatibility-and-calibration",
                                        "name": "Input compatibility and calibration",
                                        "description": "Record pad, trigger and hi-hat controller compatibility and the settings used to interpret playing gestures.",
                                        "questions": [
                                            {
                                                "text": "Which documented combinations of pads, triggers, controllers and module inputs support the intended zones and gestures?",
                                                "kind": "provenance",
                                                "id": "input-compatibility-and-calibration-q01"
                                            },
                                            {
                                                "text": "What calibration changes are needed if strikes are missed, duplicated or detected on neighbouring pads?",
                                                "kind": "action",
                                                "id": "input-compatibility-and-calibration-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "sound-generation-and-output",
                                "name": "Sound generation and output",
                                "description": "Follows trigger events to their assigned voices and usable outputs.",
                                "findings": [
                                    {
                                        "id": "audible-signal-path",
                                        "name": "Audible signal path",
                                        "description": "Identify the sound source, selected voice configuration, power requirements and route to headphones or external audio equipment.",
                                        "questions": [
                                            {
                                                "text": "Which module or external sound source generates each voice, and which power and signal connections does it require?",
                                                "kind": "boundary",
                                                "id": "audible-signal-path-q01"
                                            },
                                            {
                                                "text": "How will the agent verify that every intended strike zone and controller produces the expected response at the selected output?",
                                                "kind": "action",
                                                "id": "audible-signal-path-q02"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "readiness-care-and-movement",
                        "name": "Readiness, care and movement",
                        "description": "Connects inspection, maintenance and transport to the kit's intended use.",
                        "rationale": "A drum kit is repeatedly struck, adjusted and often dismantled, so playable condition must be assessed across both percussion components and supporting hardware.",
                        "layers": [
                            {
                                "id": "playing-condition",
                                "name": "Playing condition",
                                "description": "Assesses defects and use conditions before the kit is played.",
                                "findings": [
                                    {
                                        "id": "condition-and-use-limits",
                                        "name": "Condition and use limits",
                                        "description": "Record damaged heads or cymbals, unstable hardware, defective pedals and electronic faults, together with their effects on a proposed use.",
                                        "questions": [
                                            {
                                                "text": "Which observed defects prevent the requested playing session or restrict particular voices and controls?",
                                                "kind": "boundary",
                                                "id": "condition-and-use-limits-q01"
                                            },
                                            {
                                                "text": "What checks or mitigations are required for sound exposure, moving pedal parts and cables in this playing environment?",
                                                "kind": "action",
                                                "id": "condition-and-use-limits-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "service-and-reassembly",
                                "name": "Service and reassembly",
                                "description": "Preserves compatibility and setup information through maintenance and movement.",
                                "findings": [
                                    {
                                        "id": "replaceable-parts-and-setup-memory",
                                        "name": "Replaceable parts and setup memory",
                                        "description": "Record replacement requirements and the positions, connections and settings needed to restore the playable arrangement.",
                                        "questions": [
                                            {
                                                "text": "Which head sizes, pedal parts, mounting interfaces and electronic connections must a replacement match?",
                                                "kind": "boundary",
                                                "id": "replaceable-parts-and-setup-memory-q01"
                                            },
                                            {
                                                "text": "What labels, position measurements and saved module settings are needed before dismantling the kit for transport?",
                                                "kind": "action",
                                                "id": "replaceable-parts-and-setup-memory-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": [
                                            "The sense covered is the complete musical instrument setup, also commonly called a drum set, rather than a software collection of percussion sounds.",
                                            "Dimensions describe common acoustic components, not mandatory limits; specialist, historical and children's kits can differ substantially.",
                                            "No universal drum-kit-specific standard or identifier is asserted; electronic components may have jurisdiction-dependent electrical and electromagnetic compliance requirements."
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-confidence-notes-q01",
                                                "text": "Which of these check these first hold for the sense of drum kit this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-kinds",
                                        "name": "Kinds and varieties",
                                        "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                                        "evidence": [
                                            "Acoustic drum kit",
                                            "Electronic drum kit",
                                            "Hybrid acoustic-electronic drum kit",
                                            "Compact or portable drum kit"
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-kinds-q01",
                                                "text": "Which of these kinds and varieties hold for the sense of drum kit 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": [
                                            "Providing rhythm, pulse and accents in musical ensembles",
                                            "Live performance and studio recording",
                                            "Solo percussion performance",
                                            "Music teaching and individual practice",
                                            "Electronic triggering of sampled or synthesized percussion sounds"
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-real-world-use-q01",
                                                "text": "Which of these real-world use hold for the sense of drum kit this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-measurements",
                                        "name": "Typical measurements",
                                        "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                                        "evidence": [
                                            {
                                                "quantity": "Acoustic bass drum diameter",
                                                "typical_range": "18-24",
                                                "unit": "inch"
                                            },
                                            {
                                                "quantity": "Acoustic snare drum diameter",
                                                "typical_range": "13-14",
                                                "unit": "inch"
                                            },
                                            {
                                                "quantity": "Acoustic tom diameter",
                                                "typical_range": "8-18",
                                                "unit": "inch"
                                            },
                                            {
                                                "quantity": "Hi-hat cymbal diameter",
                                                "typical_range": "13-15",
                                                "unit": "inch"
                                            }
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-measurements-q01",
                                                "text": "Which of these typical measurements hold for the sense of drum kit 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": [
                                            "Drumheads stretch, lose tuning or split; sticks and heads require periodic replacement.",
                                            "Cymbals can crack, particularly with excessive mounting restraint or repeated damaging impacts.",
                                            "Loose clamps, stands or pedal components can slip, collapse or interrupt playing.",
                                            "High sound levels can damage hearing.",
                                            "Poor positioning and repetitive playing can contribute to musculoskeletal strain."
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-failure-modes-and-hazards-q01",
                                                "text": "Which of these failure modes and hazards hold for the sense of drum kit 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": [
                                            "Drum and cymbal diameters are commonly marketed in inches, including in countries that otherwise use metric units."
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-regional-variation-q01",
                                                "text": "Which of these regional variation hold for the sense of drum kit 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": "Drum",
                                                "difference": "A drum is an individual percussion instrument; a drum kit combines several instruments for coordinated playing by one musician."
                                            },
                                            {
                                                "name": "Percussion ensemble",
                                                "difference": "A percussion ensemble comprises multiple performers, whereas a drum kit is an instrumental setup ordinarily played by one performer."
                                            },
                                            {
                                                "name": "Drum machine",
                                                "difference": "A drum machine generates or sequences percussion patterns electronically; an electronic drum kit provides pads and pedals for direct performance."
                                            },
                                            {
                                                "name": "Electronic drum module",
                                                "difference": "The module generates or controls electronic sounds and is a component of an electronic kit, rather than the complete playable setup."
                                            }
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-neighbours-q01",
                                                "text": "Which of these neighbouring kinds and how to tell them apart hold for the sense of drum kit this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    }
                ]
            },
            "openQuestions": [
                "Does the registry intend drum kit to include compact suitcase kits, cocktail kits and tabletop electronic percussion units, and what minimum coordinated arrangement defines the boundary?",
                "Which existing Vercy models own individual drums, cymbals, pedals and sound modules, and how should this model reference them without duplicating their content?",
                "Which manufacturer documents establish compatibility and calibration requirements for the electronic and hybrid configurations to be represented?",
                "Which inspection criteria justify repair or replacement of heads, cymbals, mounts and pedal mechanisms for each construction type?",
                "Which sound-exposure rules and electrical or product standards apply in the intended jurisdiction and use setting, and which apply to the assembled kit versus individual components?"
            ],
            "statistics": {
                "bundles": 6,
                "layers": 11,
                "findings": 17,
                "questions": 27
            }
        },
        "draft": {
            "generator": "vr.draft.v3",
            "status": "draft-generated",
            "researched": false,
            "archetype": "device, machine or tool",
            "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 drum kit, record what state it is in, and decide what may be done with it.",
            "whatItIs": "Enable an AI agent to recognise a drum kit, describe its playable configuration, assess its condition and determine suitable setup, playing and maintenance actions.",
            "characteristics": {
                "substance": "material",
                "origin": "manufactured",
                "agency": "inert",
                "mobility": "varies"
            },
            "whatYouCanDoWithIt": [
                "observed and measured"
            ],
            "distinguishingFeatures": [
                "Names folded into this entry, which a task may need to split apart again: Yamaha Hipgig, Vistalite Drums, cocktail drum, Bombo de batería, North Drums, Ludwig Amber Vistalite.",
                "6 finer distinctions are held as aliases rather than separate entries, because telling them apart needs a task that asks for it.",
                "Described in 82 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 drum kit, and on what evidence are they told apart?"
            ],
            "whatItIsMadeOf": "matter you can touch",
            "physicalCharacter": [
                "Mobility varies between examples.",
                "Does nothing on its own; everything it does, something else did to it.",
                "These come from the domain this entry sits in rather than from the entry itself, so treat them as a first guess about the whole domain applied to one thing."
            ],
            "whatCanBeDoneWithIt": [
                "observe it, measure it, record its state"
            ],
            "howItIsRecognised": [
                "Recognised by form, by the arrangement of its controls, and by markings - a plate, a model number, a certification mark. Form alone rarely separates two models that do very different things."
            ],
            "relatedModels": [
                {
                    "relation": "covers",
                    "note": "Finer kinds folded into this entry because telling them apart needs a task that asks for it. Each is a model waiting to be split out when one does.",
                    "targets": [
                        "Yamaha Hipgig",
                        "Vistalite Drums",
                        "cocktail drum",
                        "Bombo de batería",
                        "North Drums",
                        "Ludwig Amber Vistalite"
                    ]
                }
            ],
            "standing": "Described in 82 Wikipedia languages, which measures how widely it is written about rather than how important or how common it is. 6 finer distinctions are held inside this entry as names rather than as separate models.",
            "structure": {
                "bundles": [
                    {
                        "id": "identity-and-classification",
                        "name": "Identity, naming and classification",
                        "description": "How an agent tells one drum kit from another, and a drum kit 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 drum kit, 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 drum kit, 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 drum kit 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 drum kit, 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 drum kit, 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 drum kit 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 drum kit 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 drum kit, 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 drum kit, 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 drum kit 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 drum kit from the things most often confused with it.",
                                        "questions": [
                                            {
                                                "id": "distinguishing-features-q01",
                                                "text": "What identifies and describes what distinguishes a drum kit, 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 drum kit, 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 drum kit is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "form-and-composition",
                        "name": "Form, composition and condition",
                        "description": "What a drum kit is made of, what shape and size it takes, and what state it is in.",
                        "rationale": "A physical thing can be measured, and a model that cannot record its measurements cannot support any decision that depends on them.",
                        "layers": [
                            {
                                "id": "form-and-dimensions",
                                "name": "Form and dimensions",
                                "description": "Shape, size, mass and the ranges these take across examples.",
                                "findings": [
                                    {
                                        "id": "measurable-dimensions",
                                        "name": "Measurable dimensions and their units",
                                        "description": "The quantities worth recording and the units they are recorded in.",
                                        "questions": [
                                            {
                                                "id": "measurable-dimensions-q01",
                                                "text": "What identifies and describes the dimensions of a drum kit, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "measurable-dimensions-q02",
                                                "text": "Who or what asserted this about the dimensions of a drum kit, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "measurable-dimensions-q03",
                                                "text": "What may an agent decide or do once the dimensions of a drum kit is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "material-and-composition",
                                "name": "Material and composition",
                                "description": "Materials, parts and how they are put together.",
                                "findings": [
                                    {
                                        "id": "parts-and-materials",
                                        "name": "Parts and materials",
                                        "description": "What a drum kit is built from and which parts are replaceable.",
                                        "questions": [
                                            {
                                                "id": "parts-and-materials-q01",
                                                "text": "What identifies and describes the composition of a drum kit, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "parts-and-materials-q02",
                                                "text": "Who or what asserted this about the composition of a drum kit, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "parts-and-materials-q03",
                                                "text": "What may an agent decide or do once the composition of a drum kit is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "condition-and-integrity",
                                "name": "Condition and integrity",
                                "description": "Wear, damage, health and the difference between working and broken.",
                                "findings": [
                                    {
                                        "id": "condition-assessment",
                                        "name": "Condition, damage and health",
                                        "description": "How the condition of a drum kit is judged and by whom.",
                                        "questions": [
                                            {
                                                "id": "condition-assessment-q01",
                                                "text": "What identifies and describes the condition of a drum kit, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "condition-assessment-q02",
                                                "text": "Who or what asserted this about the condition of a drum kit, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "condition-assessment-q03",
                                                "text": "What may an agent decide or do once the condition of a drum kit is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "place-and-movement",
                        "name": "Place and movement",
                        "description": "Where a drum kit is, how it got there and where it may go (varies).",
                        "rationale": "A thing that can move needs its position recorded with a time, or every later claim about it is about a place it has left.",
                        "layers": [
                            {
                                "id": "location-and-placement",
                                "name": "Location and placement",
                                "description": "Position, containment and the reference frame the position is given in.",
                                "findings": [
                                    {
                                        "id": "position-and-frame",
                                        "name": "Position, container and reference frame",
                                        "description": "Where a drum kit is, and what that position is measured against.",
                                        "questions": [
                                            {
                                                "id": "position-and-frame-q01",
                                                "text": "What identifies and describes the location of a drum kit, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "position-and-frame-q02",
                                                "text": "Who or what asserted this about the location of a drum kit, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "position-and-frame-q03",
                                                "text": "What may an agent decide or do once the location of a drum kit is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "movement-and-transfer",
                                "name": "Movement and transfer",
                                "description": "How a drum kit is carried, installed or relocated.",
                                "findings": [
                                    {
                                        "id": "movement-events",
                                        "name": "Movement events and constraints",
                                        "description": "What counts as a movement, what records it and what limits it.",
                                        "questions": [
                                            {
                                                "id": "movement-events-q01",
                                                "text": "What identifies and describes the movement of a drum kit, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "movement-events-q02",
                                                "text": "Who or what asserted this about the movement of a drum kit, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "movement-events-q03",
                                                "text": "What may an agent decide or do once the movement of a drum kit 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 drum kit 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 drum kit between them.",
                                        "questions": [
                                            {
                                                "id": "stages-and-transitions-q01",
                                                "text": "What identifies and describes the lifecycle of a drum kit, 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 drum kit, 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 drum kit 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 drum kit, how often and by whom.",
                                "findings": [
                                    {
                                        "id": "observation-record",
                                        "name": "Observation record",
                                        "description": "How an observation of a drum kit 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 drum kit, 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 drum kit, 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 drum kit is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "function-and-principle",
                        "name": "Function and operating principle",
                        "description": "What drum kit is for and how it achieves it.",
                        "rationale": "Two devices with the same name can work on different principles, and the principle is what predicts failure and constrains use.",
                        "layers": [
                            {
                                "id": "intended-function",
                                "name": "Intended function",
                                "description": "The job it does, and the jobs it is used for anyway.",
                                "findings": [
                                    {
                                        "id": "function-record",
                                        "name": "Function, principle and variants",
                                        "description": "What it does, how, and which variants do it differently.",
                                        "questions": [
                                            {
                                                "id": "function-record-q01",
                                                "text": "What function does drum kit perform, on what operating principle, and which variants differ in that principle?",
                                                "kind": "definition"
                                            },
                                            {
                                                "id": "function-record-q02",
                                                "text": "What use falls outside the intended function but happens in practice?",
                                                "kind": "boundary"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "capacity-and-rating",
                                "name": "Capacity and rating",
                                "description": "The numbers that say what it can do and where it stops.",
                                "findings": [
                                    {
                                        "id": "ratings",
                                        "name": "Ratings and their conditions",
                                        "description": "Rated capacity, power, throughput and the conditions each assumes.",
                                        "questions": [
                                            {
                                                "id": "ratings-q01",
                                                "text": "What ratings characterise drum kit, in what units, and under what stated conditions?",
                                                "kind": "measurement"
                                            },
                                            {
                                                "id": "ratings-q02",
                                                "text": "What happens beyond the rating - degradation, refusal, damage - and how is that detected?",
                                                "kind": "action"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "operation-and-state",
                        "name": "Operation, controls and state",
                        "description": "How drum kit is operated and what state it is in right now.",
                        "rationale": "An agent acting on a device needs its current state and the controls that change it, not just its specification.",
                        "layers": [
                            {
                                "id": "controls-and-modes",
                                "name": "Controls and modes",
                                "description": "What can be set, what that changes, and what is interlocked.",
                                "findings": [
                                    {
                                        "id": "control-surface",
                                        "name": "Control surface and interlocks",
                                        "description": "The settings available and the conditions that block them.",
                                        "questions": [
                                            {
                                                "id": "control-surface-q01",
                                                "text": "What controls and modes does drum kit have, and what does each change?",
                                                "kind": "definition"
                                            },
                                            {
                                                "id": "control-surface-q02",
                                                "text": "Which actions are interlocked or forbidden in which state, and what must be true before acting?",
                                                "kind": "action"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "condition-and-maintenance",
                                "name": "Condition and maintenance",
                                "description": "Wear, service intervals, consumables and the line between working and broken.",
                                "findings": [
                                    {
                                        "id": "service-record",
                                        "name": "Condition, service and consumables",
                                        "description": "What is consumed, what is serviced, and how condition is judged.",
                                        "questions": [
                                            {
                                                "id": "service-record-q01",
                                                "text": "What consumables and service does drum kit need, at what interval, and on whose authority?",
                                                "kind": "measurement"
                                            },
                                            {
                                                "id": "service-record-q02",
                                                "text": "What evidence separates a unit that is working from one that is out of service?",
                                                "kind": "boundary"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "kind-model-unit",
                        "name": "Kind, model and unit",
                        "description": "Whether a claim about drum kit is about the kind, a product line, or one physical unit.",
                        "rationale": "This is the boundary most often got wrong for made things, and getting it wrong mixes a catalogue entry with the machine in the yard.",
                        "layers": [
                            {
                                "id": "level-of-reference",
                                "name": "Level of reference",
                                "description": "The three levels and what belongs at each.",
                                "findings": [
                                    {
                                        "id": "level-rules",
                                        "name": "What belongs to kind, model and unit",
                                        "description": "Which properties are shared by all of them and which are not.",
                                        "questions": [
                                            {
                                                "id": "level-rules-q01",
                                                "text": "Which facts about drum kit hold for every one of them, which for a model, and which only for one unit?",
                                                "kind": "boundary"
                                            },
                                            {
                                                "id": "level-rules-q02",
                                                "text": "What identifies an individual unit, and what should an agent do when it has only the kind?",
                                                "kind": "action"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "standards-and-conformity",
                                "name": "Standards and conformity",
                                "description": "The standards a working example must meet and who attests it.",
                                "findings": [
                                    {
                                        "id": "conformity",
                                        "name": "Standards, marks and attestation",
                                        "description": "Which standard applies, who certifies, and what the mark means.",
                                        "questions": [
                                            {
                                                "id": "conformity-q01",
                                                "text": "Which standards govern drum kit, issued by whom, and what does conformity actually assert?",
                                                "kind": "provenance"
                                            },
                                            {
                                                "id": "conformity-q02",
                                                "text": "What may an agent conclude from a certification mark, and what may it not?",
                                                "kind": "boundary"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "provenance-and-evidence",
                        "name": "Provenance, evidence and time",
                        "description": "Where every claim about a drum kit 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 drum kit and how confident it is.",
                                        "questions": [
                                            {
                                                "id": "claim-provenance-q01",
                                                "text": "What identifies and describes a claim about a drum kit, 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 drum kit, 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 drum kit 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 drum kit is retired without being erased.",
                                        "questions": [
                                            {
                                                "id": "validity-and-supersession-q01",
                                                "text": "What identifies and describes the validity of a claim about a drum kit, 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 drum kit, 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 drum kit is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    }
                ]
            },
            "statistics": {
                "bundles": 8,
                "layers": 17,
                "findings": 19,
                "questions": 51
            }
        }
    }
}