{
    "model": {
        "rank": 5434,
        "code": "thing-q6452016",
        "model_id": "vr.tr.height-above-mean-sea-level",
        "name": "height above mean sea level",
        "purpose": "Enable an agent to interpret, compare and use a reported vertical position relative to mean sea level while preserving its reference surface, measurement context and uncertainty.",
        "family": "Thing Registry",
        "category": "Cross-cutting context",
        "status": "research-draft",
        "kind": "thing",
        "plane": "XCT",
        "domain": "XCT.QLT",
        "industry": "",
        "version": "",
        "url": "/models/thing/q6452016/",
        "tier": 2,
        "score": 67,
        "payload": {
            "layer": "wikidata",
            "aliases": [
                "orbit of the International Space Station",
                "high altitude"
            ],
            "aliasCount": 2,
            "merged": 2,
            "knownIn": 67,
            "facets": null,
            "markers": [],
            "lexicalClass": "",
            "senseRank": null,
            "alsoRegisteredAs": null,
            "source": {
                "dataset": "wikidata",
                "item": "Q6452016",
                "url": "https://www.wikidata.org/wiki/Q6452016",
                "license": "CC0 1.0"
            }
        },
        "research": {
            "vercy": "1.0-draft",
            "publication": {
                "status": "research-draft",
                "adjudicationStatus": "unreviewed",
                "publishableCanonical": false,
                "generatedAt": "2026-09-09T22:22:10Z",
                "providers": [
                    "Codex"
                ],
                "breadth": "recalled by Codex without web access - no source was read",
                "missingProviders": [],
                "pass": 2,
                "cost": {
                    "grok": {
                        "seconds": 19.4,
                        "error": "Reading additional input from stdin...\nOpenAI Codex v0.153.4\n--------\nworkdir: R:\\02_PROJECTS\\02_Meta_Models_Platforms\\Ver.cy\\current\\thing-registry-backlog\nmodel: gpt-6-astra\nprovider: openai\napproval: never\nsandbox: read-only\nreasoning effort: none\nreasoning summaries: none\nsession id: 01a08842-c5e8-7bb0-aaab-526a6e4e2093\n--------\nuser\nDescribe what is already known about one registered thing. Answer as JSON only, no prose around it.\n\nThing: height above mean sea level\nSense to describe: (none recorded)\nDomain code: XCT.QLT\nAlso known as: (none)\n\n\nContext for this batch of 1001 things:\n# Bat",
                        "usd": 0,
                        "recall": true
                    },
                    "codex": {
                        "seconds": 57.9,
                        "error": "Reading additional input from stdin...\nOpenAI Codex v0.153.4\n--------\nworkdir: R:\\02_PROJECTS\\02_Meta_Models_Platforms\\Ver.cy\\current\\thing-registry-backlog\nmodel: gpt-6-astra\nprovider: openai\napproval: never\nsandbox: read-only\nreasoning effort: none\nreasoning summaries: none\nsession id: 01a08842-c5e3-7af2-9938-b626ef2b8c7f\n--------\nuser\nYou are drafting a Vercy meta-model for one registered thing. Answer as JSON only, no prose around it.\n\nThing: height above mean sea level\nRegistry id: vr.tr.height-above-mean-sea-level\nPlane / domain: XCT / XCT.QLT\nRegistry definition: (none recorded)\nNames f"
                    }
                }
            },
            "metaModel": {
                "id": "THING-Q6452016",
                "registryId": "vr.tr.height-above-mean-sea-level",
                "name": "height above mean sea level",
                "version": "0.1.0-research.1",
                "entryKind": "thing",
                "family": "Thing Registry",
                "domain": [
                    "XCT.QLT"
                ],
                "status": "research-draft"
            },
            "canonicalUrl": "https://ver.cy/models/thing/q6452016/",
            "model": {
                "registry_id": "vr.tr.height-above-mean-sea-level",
                "name": "height above mean sea level",
                "purpose": "Enable an agent to interpret, compare and use a reported vertical position relative to mean sea level while preserving its reference surface, measurement context and uncertainty.",
                "definition": "Height above mean sea level is the vertical position of a point relative to a specified sea-level-based reference surface or vertical datum, conventionally positive upward.",
                "scope_statement": "This model owns height above mean sea level as a signed vertical quantity attributed to a specified point or surface, including how the sea-level reference is realised and when reported heights can be compared.",
                "in_scope": [
                    "The point or surface whose height is reported",
                    "The meaning and realisation of the mean-sea-level reference",
                    "Height value, unit, sign convention and uncertainty",
                    "Measurement or derivation method and supporting reference information",
                    "Spatial and temporal applicability of reported heights",
                    "Conditions for comparing or transforming sea-level-referenced heights"
                ],
                "out_of_scope": [
                    "Latitude, longitude and complete positioning systems except as needed to interpret height",
                    "Height above local ground or a building's base",
                    "Ellipsoidal height as an independent quantity",
                    "Instantaneous tide level and sea-level change as phenomena",
                    "Terrain morphology and landform classification",
                    "Flood prediction, aviation clearance and engineering design decisions"
                ],
                "distinguishing_features": [
                    "Its zero is a stated mean-sea-level reference or associated vertical datum, rather than the ground immediately beneath the measured point.",
                    "A value labelled altitude or elevation qualifies only when its vertical reference is established; the label alone does not establish mean-sea-level referencing.",
                    "A raw ellipsoidal height is not interchangeable with height above mean sea level without an identified relationship between the reference surfaces.",
                    "A negative value denotes a point below the adopted reference zero and is a valid height value.",
                    "A sea-level reference based on averaging or a datum realisation differs from the instantaneous sea surface at a particular tide."
                ],
                "characteristics": [
                    {
                        "name": "Reported height",
                        "kind": "measurement",
                        "unit_or_values": "Signed length with an explicit unit, commonly metres or feet",
                        "why_it_matters": "Provides the vertical quantity while preventing unit and sign ambiguity."
                    },
                    {
                        "name": "Height-bearing point",
                        "kind": "relation",
                        "unit_or_values": "Identified point or surface, including horizontal location and the relevant part of an object",
                        "why_it_matters": "Distinguishes a summit, ground surface, antenna reference point or other measurement target."
                    },
                    {
                        "name": "Vertical reference",
                        "kind": "relation",
                        "unit_or_values": "Named datum, local sea-level reference or explicitly unknown reference",
                        "why_it_matters": "Establishes what zero means and whether another height is comparable."
                    },
                    {
                        "name": "Height-system interpretation",
                        "kind": "category",
                        "unit_or_values": "Declared height-system type, locally defined sea-level height or unspecified",
                        "why_it_matters": "Prevents the phrase above mean sea level from concealing different technical definitions."
                    },
                    {
                        "name": "Reference realisation",
                        "kind": "relation",
                        "unit_or_values": "Applicable benchmark network, reference model, version or local averaging record",
                        "why_it_matters": "Connects the stated reference to a reproducible practical realisation."
                    },
                    {
                        "name": "Observation and reference times",
                        "kind": "relation",
                        "unit_or_values": "Observation date, reference epoch and sea-level averaging interval where applicable",
                        "why_it_matters": "Separates when the point was measured from when its reference was established."
                    },
                    {
                        "name": "Determination method",
                        "kind": "category",
                        "unit_or_values": "Levelling, satellite-derived conversion, calibrated barometry, mapped or modelled estimate, other documented method or unknown",
                        "why_it_matters": "Identifies which corrections, assumptions and error sources require examination."
                    },
                    {
                        "name": "Height uncertainty",
                        "kind": "measurement",
                        "unit_or_values": "Length-valued uncertainty with its statistical meaning and included error contributions",
                        "why_it_matters": "Supports defensible comparisons and prevents displayed precision from being mistaken for accuracy."
                    },
                    {
                        "name": "Interpretation readiness",
                        "kind": "state",
                        "unit_or_values": "Reference established, reference ambiguous, transformation required or inadequate for intended use",
                        "why_it_matters": "Makes missing reference information actionable."
                    }
                ],
                "affordances": [
                    "Interpret a signed height against its documented sea-level reference.",
                    "Request missing datum, target-point or epoch information before comparing elevations.",
                    "Determine whether two reported heights share a compatible reference and uncertainty basis.",
                    "Transform a height using an applicable documented transformation while retaining the original value.",
                    "Assess whether a reported height has sufficient accuracy and reference information for a stated task.",
                    "Flag apparent height changes that may result from reference changes or measurement differences."
                ]
            },
            "sources": [],
            "structure": {
                "bundles": [
                    {
                        "id": "meaning-of-sea-level-height",
                        "name": "Meaning of sea-level height",
                        "description": "Establishes what quantity the expression height above mean sea level denotes in the reporting context.",
                        "rationale": "The everyday expression does not by itself identify a precise vertical reference or height-system definition.",
                        "layers": [
                            {
                                "id": "height-bearing-target",
                                "name": "Height-bearing target",
                                "description": "Identifies the point represented by the reported vertical position.",
                                "findings": [
                                    {
                                        "id": "specified-height-point",
                                        "name": "Specified height point",
                                        "description": "Interpretation requires knowing which point or surface carries the height, including any offset between the instrument and the intended target.",
                                        "questions": [
                                            {
                                                "text": "Does the value describe ground, a summit, a water surface, an instrument reference point or another explicitly identified point?",
                                                "kind": "definition",
                                                "id": "specified-height-point-q01"
                                            },
                                            {
                                                "text": "Which instrument, antenna or surface offsets were applied to obtain the target point's height?",
                                                "kind": "measurement",
                                                "id": "specified-height-point-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "reference-sensitive-meaning",
                                "name": "Reference-sensitive meaning",
                                "description": "Separates sea-level-referenced height from neighbouring vertical quantities.",
                                "findings": [
                                    {
                                        "id": "declared-height-interpretation",
                                        "name": "Declared height interpretation",
                                        "description": "Terms such as elevation and altitude require contextual interpretation; their wording alone does not establish that a value is referenced to mean sea level.",
                                        "questions": [
                                            {
                                                "text": "How does the reporting authority define mean sea level and the associated height quantity?",
                                                "kind": "definition",
                                                "id": "declared-height-interpretation-q01"
                                            },
                                            {
                                                "text": "What evidence distinguishes this value from ellipsoidal height, height above ground, pressure altitude or instantaneous water level?",
                                                "kind": "boundary",
                                                "id": "declared-height-interpretation-q02"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "sea-level-reference-realisation",
                        "name": "Sea-level reference realisation",
                        "description": "Records how the adopted reference zero is defined and made available for measurement.",
                        "rationale": "Two reports can both say above mean sea level while using different reference surfaces or datum realisations.",
                        "layers": [
                            {
                                "id": "reference-zero",
                                "name": "Reference zero",
                                "description": "Identifies the authority and definition behind the adopted sea-level reference.",
                                "findings": [
                                    {
                                        "id": "traceable-reference-zero",
                                        "name": "Traceable reference zero",
                                        "description": "A usable interpretation identifies the adopted vertical datum or local sea-level definition rather than treating mean sea level as a self-explanatory universal zero.",
                                        "questions": [
                                            {
                                                "text": "Which named vertical datum or local sea-level definition supplies zero for this height?",
                                                "kind": "provenance",
                                                "id": "traceable-reference-zero-q01"
                                            },
                                            {
                                                "text": "If zero comes from local sea-level observations, which station, averaging interval and processing definition established it?",
                                                "kind": "measurement",
                                                "id": "traceable-reference-zero-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "practical-reference-access",
                                "name": "Practical reference access",
                                "description": "Connects the reference definition to benchmarks, models or other means used to determine the height.",
                                "findings": [
                                    {
                                        "id": "reference-realisation-and-coverage",
                                        "name": "Reference realisation and coverage",
                                        "description": "The model needs the particular reference realisation used and its applicable area and time, including relevant benchmark or reference-model versions.",
                                        "questions": [
                                            {
                                                "text": "Which benchmark identifiers, reference-model version or other realisation connected the observation to the adopted datum?",
                                                "kind": "provenance",
                                                "id": "reference-realisation-and-coverage-q01"
                                            },
                                            {
                                                "text": "Is that realisation applicable at the target location and relevant epoch?",
                                                "kind": "boundary",
                                                "id": "reference-realisation-and-coverage-q02"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "height-determination-and-quality",
                        "name": "Height determination and quality",
                        "description": "Explains how the reported height was obtained and what confidence its value supports.",
                        "rationale": "A surveyed height, converted satellite height and map estimate need different evidence before an agent can rely on them.",
                        "layers": [
                            {
                                "id": "determination-chain",
                                "name": "Determination chain",
                                "description": "Traces observations and corrections to the reported sea-level-referenced value.",
                                "findings": [
                                    {
                                        "id": "documented-height-derivation",
                                        "name": "Documented height derivation",
                                        "description": "The derivation should identify the measured quantity, its original reference and the corrections or transformations producing the reported height.",
                                        "questions": [
                                            {
                                                "text": "Was this height obtained through levelling, satellite observations, calibrated barometry, a terrain dataset or another method?",
                                                "kind": "measurement",
                                                "id": "documented-height-derivation-q01"
                                            },
                                            {
                                                "text": "Which original observations, calibration records and conversion steps support the reported sea-level reference?",
                                                "kind": "provenance",
                                                "id": "documented-height-derivation-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "uncertainty-and-resolution",
                                "name": "Uncertainty and resolution",
                                "description": "Separates reporting precision from the uncertainty of the height and its reference.",
                                "findings": [
                                    {
                                        "id": "interpretable-height-uncertainty",
                                        "name": "Interpretable height uncertainty",
                                        "description": "Uncertainty must be interpretable in length units with stated statistical meaning and scope; decimal places alone cannot establish accuracy.",
                                        "questions": [
                                            {
                                                "text": "What uncertainty is reported, with what confidence convention, and does it include reference-model and transformation errors?",
                                                "kind": "measurement",
                                                "id": "interpretable-height-uncertainty-q01"
                                            },
                                            {
                                                "text": "How do rounding, terrain sampling or horizontal-position uncertainty affect the height assigned to this particular point?",
                                                "kind": "measurement",
                                                "id": "interpretable-height-uncertainty-q02"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "comparison-change-and-use",
                        "name": "Comparison, change and use",
                        "description": "Governs comparisons, transformations and interpretations of height differences.",
                        "rationale": "Numerical differences only support conclusions when target points, reference systems, times and uncertainties are understood.",
                        "layers": [
                            {
                                "id": "reference-compatible-comparison",
                                "name": "Reference-compatible comparison",
                                "description": "Determines when heights can be compared directly and when a transformation is necessary.",
                                "findings": [
                                    {
                                        "id": "comparison-and-transformation-conditions",
                                        "name": "Comparison and transformation conditions",
                                        "description": "Before comparing heights, an agent must establish compatible units and references or use a documented transformation with adequate coverage and uncertainty.",
                                        "questions": [
                                            {
                                                "text": "Do the values use compatible units, sign conventions, height systems and datum realisations?",
                                                "kind": "boundary",
                                                "id": "comparison-and-transformation-conditions-q01"
                                            },
                                            {
                                                "text": "If a transformation is required, which documented operation applies here and what additional uncertainty does it introduce?",
                                                "kind": "action",
                                                "id": "comparison-and-transformation-conditions-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "temporal-and-task-interpretation",
                                "name": "Temporal and task interpretation",
                                "description": "Relates apparent height changes and practical use to observation times and evidence quality.",
                                "findings": [
                                    {
                                        "id": "supported-height-conclusions",
                                        "name": "Supported height conclusions",
                                        "description": "A difference between reported heights can reflect point movement, reference changes or measurement effects; intended use determines the evidence and accuracy required.",
                                        "questions": [
                                            {
                                                "text": "For repeated measurements, what evidence separates movement of the same target point from datum revisions, reference changes and measurement uncertainty?",
                                                "kind": "measurement",
                                                "id": "supported-height-conclusions-q01"
                                            },
                                            {
                                                "text": "Does the height's reference, age and uncertainty support the intended task, or must the agent obtain a better measurement or additional context?",
                                                "kind": "action",
                                                "id": "supported-height-conclusions-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 registry supplies no sense; this description covers the geodetic quantity and its ordinary mapping usage.",
                                            "Mean sea level is not one universally realised zero surface; identify the datum, height type and relevant epoch before comparing values.",
                                            "Normal heights reference a quasigeoid, not a gravity equipotential surface; their inclusion reflects practical usage of sea-level-based national height systems."
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-confidence-notes-q01",
                                                "text": "Which of these check these first hold for the sense of height above mean sea level 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": [
                                            "Orthometric height, referenced to the geoid",
                                            "Normal height, referenced to the quasigeoid",
                                            "Height referenced to a local mean-sea-level datum"
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-kinds-q01",
                                                "text": "Which of these kinds and varieties hold for the sense of height above mean sea level this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-identifiers",
                                        "name": "Identifiers and schemes",
                                        "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                                        "evidence": [
                                            {
                                                "scheme": "EPSG Dataset",
                                                "value_or_pattern": "EPSG:<numeric code>",
                                                "note": "Codes identify particular vertical coordinate reference systems and datums; there is no single code for height above mean sea level in general."
                                            }
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-identifiers-q01",
                                                "text": "Which of these identifiers and schemes hold for the sense of height above mean sea level this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-standards-and-regulation",
                                        "name": "Standards and regulation",
                                        "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                                        "evidence": [
                                            "ISO 19111, Geographic information - Referencing by coordinates, issued by ISO",
                                            "International System of Units (SI), maintained by the BIPM, specifies the metre as the unit of length"
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-standards-and-regulation-q01",
                                                "text": "Which of these standards and regulation hold for the sense of height above mean sea level 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": [
                                            "Mapping terrain elevations and mountain summit heights",
                                            "Surveying and establishing engineering control",
                                            "Describing aerodrome elevations and aircraft altitudes",
                                            "Modelling drainage, flooding and coastal inundation",
                                            "Referencing environmental observations and infrastructure elevations"
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-real-world-use-q01",
                                                "text": "Which of these real-world use hold for the sense of height above mean sea level 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": "Height relative to the declared vertical datum",
                                                "typical_range": "Negative below the reference surface, zero on it, and positive above it; the applicable range depends on the object and application",
                                                "unit": "metre (m); feet are also used"
                                            }
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-measurements-q01",
                                                "text": "Which of these typical measurements hold for the sense of height above mean sea level 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": [
                                            "Combining elevations from different vertical datums without transformation creates systematic offsets.",
                                            "Treating GNSS ellipsoidal height as height above mean sea level can produce substantial errors.",
                                            "Using instantaneous sea level or an unspecified tidal datum as mean sea level misstates the reference.",
                                            "Confusing barometric altitude with surveyed elevation introduces errors from pressure and atmospheric conditions.",
                                            "Ignoring land motion, datum epoch or sea-level change can compromise precise comparisons over time."
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-failure-modes-and-hazards-q01",
                                                "text": "Which of these failure modes and hazards hold for the sense of height above mean sea level 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": [
                                            "National height systems use different reference tide gauges, averaging periods and datum realisations.",
                                            "Some national systems use orthometric heights, while others use normal heights.",
                                            "Metres predominate in mapping and surveying internationally; feet remain common in aviation and some national practices."
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-regional-variation-q01",
                                                "text": "Which of these regional variation hold for the sense of height above mean sea level 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": "Ellipsoidal height",
                                                "difference": "References a mathematical ellipsoid rather than a sea-level-based vertical surface."
                                            },
                                            {
                                                "name": "Height above ground level",
                                                "difference": "References the local ground surface rather than a vertical datum associated with sea level."
                                            },
                                            {
                                                "name": "Mean sea level",
                                                "difference": "Is an averaged sea-surface level used in defining references, rather than the height of another point."
                                            },
                                            {
                                                "name": "Geoid",
                                                "difference": "Is an equipotential surface of Earth's gravity field used as a reference for orthometric height, rather than a height value."
                                            },
                                            {
                                                "name": "Elevation",
                                                "difference": "Usually describes the height of a terrestrial point; its reference datum must still be specified and need not be mean sea level."
                                            }
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-neighbours-q01",
                                                "text": "Which of these neighbouring kinds and how to tell them apart hold for the sense of height above mean sea level this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    }
                ]
            },
            "openQuestions": [
                "Which authoritative definition should anchor this registry entry, and how should it accommodate technical height systems commonly described as above mean sea level?",
                "Which neighbouring registry or world-model entries already own vertical datums, ellipsoidal height, orthometric height and normal height, so this model can link to them without duplicating their scope?",
                "What minimum reference metadata should be required before an informal above-mean-sea-level value is considered suitable for quantitative comparison?",
                "Which documented transformations and reference models should agents recognise for the jurisdictions and datasets where this model will be used?",
                "How should task-specific accuracy requirements govern the treatment of old observations, moving target points and revised vertical reference realisations?"
            ],
            "statistics": {
                "bundles": 5,
                "layers": 9,
                "findings": 17,
                "questions": 25
            }
        },
        "draft": {
            "generator": "vr.draft.v3",
            "status": "draft-generated",
            "researched": false,
            "archetype": "abstract concept",
            "method": "Written from the archetype playbook - what this kind of thing needs beyond identity and provenance - and from the structure that recurred across 6,333 models already researched by two engines. Applied to this entry by rule. No source was read for this thing and no claim here is researched. This entry carries no facets of its own, so they were inferred from its domain - a guess about a whole domain applied to one thing.",
            "facetsInferred": true,
            "nextPass": "A researcher replaces this draft with a sourced specification. Treat every sentence below as a proposal to argue with.",
            "purpose": "Give an agent a durable, checkable way to recognise a height above mean sea level, record what state it is in, and decide what may be done with it.",
            "whatItIs": "Enable an agent to interpret, compare and use a reported vertical position relative to mean sea level while preserving its reference surface, measurement context and uncertainty.",
            "characteristics": {
                "substance": "abstract",
                "origin": "conceptual",
                "agency": "inert"
            },
            "whatYouCanDoWithIt": [
                "observed and measured"
            ],
            "distinguishingFeatures": [
                "Names folded into this entry, which a task may need to split apart again: orbit of the International Space Station, high altitude.",
                "2 finer distinctions are held as aliases rather than separate entries, because telling them apart needs a task that asks for it.",
                "Described in 67 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 height above mean sea level, and on what evidence are they told apart?"
            ],
            "whatItIsMadeOf": "an abstraction with no physical instance",
            "physicalCharacter": [
                "Does nothing on its own; everything it does, something else did to it.",
                "These come from the domain this entry sits in rather than from the entry itself, so treat them as a first guess about the whole domain applied to one thing."
            ],
            "whatCanBeDoneWithIt": [
                "observe it, measure it, record its state"
            ],
            "howItIsRecognised": [
                "Nothing to see. What is recognised is an instance of it, and which instances count is exactly what is argued about."
            ],
            "relatedModels": [
                {
                    "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": [
                        "orbit of the International Space Station",
                        "high altitude"
                    ]
                }
            ],
            "standing": "Described in 67 Wikipedia languages, which measures how widely it is written about rather than how important or how common it is. 2 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 height above mean sea level from another, and a height above mean sea level 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 height above mean sea level, 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 height above mean sea level, 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 height above mean sea level 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 height above mean sea level, 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 height above mean sea level, 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 height above mean sea level 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 height above mean sea level 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 height above mean sea level, 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 height above mean sea level, 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 height above mean sea level 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 height above mean sea level from the things most often confused with it.",
                                        "questions": [
                                            {
                                                "id": "distinguishing-features-q01",
                                                "text": "What identifies and describes what distinguishes a height above mean sea level, 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 height above mean sea level, 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 height above mean sea level 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 height above mean sea level 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 height above mean sea level between them.",
                                        "questions": [
                                            {
                                                "id": "stages-and-transitions-q01",
                                                "text": "What identifies and describes the lifecycle of a height above mean sea level, 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 height above mean sea level, 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 height above mean sea level 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 height above mean sea level, how often and by whom.",
                                "findings": [
                                    {
                                        "id": "observation-record",
                                        "name": "Observation record",
                                        "description": "How an observation of a height above mean sea level 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 height above mean sea level, 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 height above mean sea level, 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 height above mean sea level is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "definitions-in-contest",
                        "name": "Definitions and who holds them",
                        "description": "What height above mean sea level is taken to mean, and by whom.",
                        "rationale": "When a field disagrees about a concept, the disagreement is the content. A model that picks one definition silently destroys the information.",
                        "layers": [
                            {
                                "id": "competing-definitions",
                                "name": "Competing definitions",
                                "description": "The main readings and the traditions behind them.",
                                "findings": [
                                    {
                                        "id": "definition-map",
                                        "name": "Definitions and their holders",
                                        "description": "Each definition with the school or body that holds it.",
                                        "questions": [
                                            {
                                                "id": "definition-map-q01",
                                                "text": "Which definitions of height above mean sea level are in use, and which tradition or body holds each?",
                                                "kind": "definition"
                                            },
                                            {
                                                "id": "definition-map-q02",
                                                "text": "What turns on the difference between them in practice?",
                                                "kind": "boundary"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "operationalisation",
                                "name": "Operationalisation",
                                "description": "How it is measured or applied when it has to be.",
                                "findings": [
                                    {
                                        "id": "operational-record",
                                        "name": "Measures and proxies",
                                        "description": "Instruments and indicators used to stand in for it.",
                                        "questions": [
                                            {
                                                "id": "operational-record-q01",
                                                "text": "How is height above mean sea level operationalised or measured in practice, and by what instrument?",
                                                "kind": "measurement"
                                            },
                                            {
                                                "id": "operational-record-q02",
                                                "text": "What does that operationalisation leave out, and when does that matter?",
                                                "kind": "boundary"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "instances-and-use",
                        "name": "Instances, use and consequence",
                        "description": "What counts as an instance of height above mean sea level and what follows from calling something that.",
                        "rationale": "Applying a concept is an act with consequences, so a model must say what the label licenses and what it does not.",
                        "layers": [
                            {
                                "id": "instances",
                                "name": "What counts as an instance",
                                "description": "Clear cases, borderline cases and non-cases.",
                                "findings": [
                                    {
                                        "id": "instance-tests",
                                        "name": "Tests for an instance",
                                        "description": "What would settle whether something falls under it.",
                                        "questions": [
                                            {
                                                "id": "instance-tests-q01",
                                                "text": "What would settle whether something is an instance of height above mean sea level?",
                                                "kind": "boundary"
                                            },
                                            {
                                                "id": "instance-tests-q02",
                                                "text": "Which borderline cases are argued about, and on what grounds?",
                                                "kind": "definition"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "consequence",
                                "name": "Consequence of application",
                                "description": "Rights, duties or decisions that follow from the label.",
                                "findings": [
                                    {
                                        "id": "consequence-record",
                                        "name": "What the label licenses",
                                        "description": "What an agent may do once something is classified this way.",
                                        "questions": [
                                            {
                                                "id": "consequence-record-q01",
                                                "text": "What follows practically once something is treated as height above mean sea level?",
                                                "kind": "action"
                                            },
                                            {
                                                "id": "consequence-record-q02",
                                                "text": "What must an agent not infer from the label alone?",
                                                "kind": "action"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "provenance-and-evidence",
                        "name": "Provenance, evidence and time",
                        "description": "Where every claim about a height above mean sea level 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 height above mean sea level and how confident it is.",
                                        "questions": [
                                            {
                                                "id": "claim-provenance-q01",
                                                "text": "What identifies and describes a claim about a height above mean sea level, 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 height above mean sea level, 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 height above mean sea level 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 height above mean sea level is retired without being erased.",
                                        "questions": [
                                            {
                                                "id": "validity-and-supersession-q01",
                                                "text": "What identifies and describes the validity of a claim about a height above mean sea level, 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 height above mean sea level, 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 height above mean sea level is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    }
                ]
            },
            "statistics": {
                "bundles": 5,
                "layers": 10,
                "findings": 12,
                "questions": 32
            }
        }
    }
}