{
  "vercy": "1.0-draft",
  "publication": {
    "status": "research-draft",
    "adjudicationStatus": "unreviewed",
    "publishableCanonical": false,
    "generatedAt": "2026-09-13T12:48:09Z",
    "providers": [
      "Claude"
    ],
    "breadth": "written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify",
    "pass": 2,
    "wave": 4,
    "engine": "claude",
    "enrichment": {
      "pass": 3,
      "engine": "claude",
      "producedAt": "2026-10-06T10:00:00Z",
      "ingestedAt": "2026-10-06T07:12:21+00:00",
      "fields": [
        "agent_conduct",
        "ethics",
        "owners"
      ]
    },
    "gate": {
      "passed": true,
      "version": "1.0",
      "at": "2026-10-06T19:51:54+00:00",
      "evidence": [
        "completeness 1.00",
        "sense: Wikidata description",
        "2 live sources",
        "review by codex: pass"
      ]
    }
  },
  "metaModel": {
    "id": "THING-Q125465",
    "registryId": "vr.tr.sea-level",
    "name": "sea level",
    "version": "0.2.0-wave.4",
    "entryKind": "thing",
    "family": "Thing Registry",
    "domain": [
      "XCT.QLT"
    ],
    "status": "research-draft"
  },
  "canonicalUrl": "https://ver.cy/models/thing/q125465/",
  "model": {
    "registry_id": "vr.tr.sea-level",
    "name": "sea level",
    "purpose": "Let an agent explain sea level and how it is defined and measured, relay tidal, eustatic and past sea level concepts from geodesy, oceanography and geology references, describe sea level rise with findings attributed, and distinguish mean sea level from tide level, geoid and local datums.",
    "definition": "The average level of the ocean surface, used as a vertical datum for measuring elevation and depth, defined locally by tide gauges as mean sea level over a period and globally by satellite altimetry, varying with tides as tide level, with eustatic changes in the volume of the oceans over geological time, and reconstructed as past sea level from geological records; global mean sea level is rising as ice melts and oceans warm.",
    "what_it_is_for": "Reference for elevation and monitoring ocean change.",
    "affordances": [
      "explain definitions",
      "relay measurement",
      "describe sea level change",
      "distinguish related concepts"
    ],
    "distinguishing_features": [
      "Vertical datum",
      "Tidal and long-term variation",
      "Global and local",
      "Climate indicator"
    ],
    "appearance": "Not a visible object; the ocean surface as a reference.",
    "visual_identification": [
      "Average level of the ocean surface",
      "Mean sea level, tide level, eustatic sea level, past sea level",
      "The geoid is a gravitational surface; local datums differ; tide level varies hourly"
    ],
    "physical_properties": [
      {
        "quantity": "global mean rise since 1900",
        "typical_range": "about 20",
        "unit": "cm",
        "note": ""
      },
      {
        "quantity": "current rate",
        "typical_range": "about 4",
        "unit": "mm per year",
        "note": "satellite era"
      },
      {
        "quantity": "Last Glacial Maximum sea level",
        "typical_range": "about 120-130 m lower",
        "unit": "note",
        "note": ""
      }
    ],
    "families_and_kinds": [
      "mean sea level at tide gauges",
      "tide level and tidal datums",
      "global mean sea level from altimetry",
      "eustatic sea level",
      "relative sea level including land movement",
      "past sea level from geological records"
    ],
    "related_models": [
      {
        "relation": "is a kind of",
        "target": "vertical datum",
        "why": "in registry terms"
      },
      {
        "relation": "is a kind of",
        "target": "water level",
        "why": "in registry terms"
      },
      {
        "relation": "is a kind of",
        "target": "two-dimensional continuant fiat boundary",
        "why": "in registry terms"
      },
      {
        "relation": "is contrasted with",
        "target": "geoid",
        "why": "a gravitational equipotential surface"
      }
    ],
    "identifiers": [],
    "standards_and_regulation": [
      "National vertical datum standards",
      "IPCC assessments of sea level change",
      "IHO tidal datum conventions"
    ],
    "failure_modes_and_hazards": [
      "Confusing local and global sea level",
      "Ignoring land subsidence in relative sea level",
      "Partisan framing of sea level rise"
    ],
    "in_scope": [],
    "out_of_scope": [],
    "characteristics": [],
    "agent_conduct": {
      "may": [
        "Report sea level measurements with the datum, method and period used.",
        "Distinguish local relative sea level from the global mean."
      ],
      "must_not": [
        "Present local sea level change without accounting for land subsidence or uplift.",
        "Mix up vertical datums when reporting heights or depths.",
        "Present a partisan view of sea level rise as settled or deny measured trends.",
        "Alter or fabricate tide gauge or satellite records."
      ],
      "requires_human": [
        "Using sea level projections for flood defence or planning decisions."
      ]
    },
    "ethics": {
      "considerations": [
        "Coastal and island communities face loss of homes and land from rising seas.",
        "Datum errors in charts and plans can endanger ships and buildings."
      ],
      "affected_parties": [
        "Coastal residents",
        "Island nations",
        "Mariners"
      ]
    },
    "owners": {
      "steward": "National mapping and hydrographic agencies maintain datums and tide gauges.",
      "master_systems": [
        "Tide gauge and sea level data archives"
      ]
    }
  },
  "sources": [
    {
      "id": "wikidata",
      "title": "Wikidata item Q125465: sea level",
      "url": "https://www.wikidata.org/wiki/Q125465",
      "url_status": "live",
      "what_it_supports": "identity and sense of the item",
      "checked_by": "wikidata-api"
    },
    {
      "id": "wikipedia-en",
      "title": "Wikipedia: Sea level",
      "url": "https://en.wikipedia.org/wiki/Sea_level",
      "url_status": "live",
      "what_it_supports": "general description of the item",
      "checked_by": "wikidata-api sitelink"
    }
  ],
  "structure": {
    "bundles": [
      {
        "id": "understand",
        "name": "Understand",
        "description": "What sea level is.",
        "rationale": "Science.",
        "layers": [
          {
            "id": "definition",
            "name": "Definition",
            "description": "Definition.",
            "findings": [
              {
                "id": "definition-finding",
                "name": "Definition",
                "description": "Definition.",
                "questions": [
                  {
                    "text": "What is sea level, and how do mean sea level, tide level, eustatic sea level and the geoid differ?",
                    "kind": "definition"
                  },
                  {
                    "text": "Is the question about the datum, tides, geology or climate change?",
                    "kind": "boundary"
                  }
                ]
              }
            ]
          },
          {
            "id": "measurement",
            "name": "Measurement",
            "description": "Measurement.",
            "findings": [
              {
                "id": "measurement-finding",
                "name": "Measurement",
                "description": "Measurement.",
                "questions": [
                  {
                    "text": "How is sea level measured by tide gauges and satellite altimetry?",
                    "kind": "measurement"
                  },
                  {
                    "text": "Which entry fits tide gauge?",
                    "kind": "action"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "change",
        "name": "Change",
        "description": "Sea level change.",
        "rationale": "Science.",
        "layers": [
          {
            "id": "rise",
            "name": "Rise",
            "description": "Current rise.",
            "findings": [
              {
                "id": "rise-finding",
                "name": "Rise",
                "description": "Rise.",
                "questions": [
                  {
                    "text": "How fast is global sea level rising, why, and what are projections, as assessments report?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which references are standard?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          },
          {
            "id": "past",
            "name": "Past",
            "description": "Past sea level.",
            "findings": [
              {
                "id": "past-finding",
                "name": "Past",
                "description": "Past.",
                "questions": [
                  {
                    "text": "How has sea level changed over geological time, and how is past sea level reconstructed?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which sources are cited?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "use",
        "name": "Use",
        "description": "Use as a datum.",
        "rationale": "Practice.",
        "layers": [
          {
            "id": "datums",
            "name": "Datums",
            "description": "Datums.",
            "findings": [
              {
                "id": "datums-finding",
                "name": "Datums",
                "description": "Datums.",
                "questions": [
                  {
                    "text": "How do national datums and chart datums relate to mean sea level?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which entry fits vertical datum?",
                    "kind": "action"
                  }
                ]
              }
            ]
          },
          {
            "id": "mapping",
            "name": "Mapping",
            "description": "Mapping and navigation.",
            "findings": [
              {
                "id": "mapping-finding",
                "name": "Mapping",
                "description": "Mapping.",
                "questions": [
                  {
                    "text": "How are elevations and depths referenced to sea level in maps and charts?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which entry fits nautical chart?",
                    "kind": "action"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "context",
        "name": "Context",
        "description": "Impacts and adaptation.",
        "rationale": "Context.",
        "layers": [
          {
            "id": "impacts",
            "name": "Impacts",
            "description": "Impacts.",
            "findings": [
              {
                "id": "impacts-finding",
                "name": "Impacts",
                "description": "Impacts.",
                "questions": [
                  {
                    "text": "How does sea level rise affect coasts, cities and islands, with findings attributed?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Is the presentation neutral?",
                    "kind": "boundary"
                  }
                ]
              }
            ]
          },
          {
            "id": "adaptation",
            "name": "Adaptation",
            "description": "Adaptation.",
            "findings": [
              {
                "id": "adaptation-finding",
                "name": "Adaptation",
                "description": "Adaptation.",
                "questions": [
                  {
                    "text": "How do communities adapt to rising seas?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which entry fits coastal management?",
                    "kind": "action"
                  }
                ]
              }
            ]
          }
        ]
      }
    ]
  },
  "openQuestions": [
    "Should sea level rise and tidal datum be separate primary entries?",
    "How should geodesy and climate sources be linked?",
    "The registry entry has merged aliases naming distinct concepts; should they be split off?"
  ],
  "statistics": {
    "bundles": 4,
    "layers": 8,
    "findings": 8,
    "questions": 16
  }
}