{
  "G68-HDR": {
    "standard_version": "1.0",
    "asset_id": "G68-R0",
    "source_type": "synthetic-neutral-reference",
    "coordinate_system": "G68-RH-XYZ-v1",
    "unit": "mm",
    "precision": "UNCERTAINTY_DRIVEN_RECORD",
    "rights_status": "synthetic-reference",
    "compatibility_level": "G68-1.0"
  },
  "reference_profile": {
    "class": "R0",
    "identifier": "G68-R0",
    "version": "1.0",
    "artifact_mode": false,
    "origin_definition": "profile-defined synthetic neutral origin"
  },
  "RGT": {
    "measurement_status": "estimated",
    "data": {
      "reference_class": "R0",
      "identity_free": true
    },
    "confidence": 1,
    "provenance": {
      "source_basis": "G68-R0 synthetic reference",
      "source_id": "G68-R0",
      "method": "theoretical in-world reference"
    },
    "coordinate_system": "G68-RH-XYZ-v1",
    "unit": "mm",
    "precision": "UNCERTAINTY_DRIVEN_RECORD"
  },
  "conformance": {
    "data_identity": "G68-1.0-structural"
  },
  "interoperability_mapping": [],
  "artifact_reference_notes": [
    "G68-AR01 — David Geometry Reference and G68-AR02 — Mona Lisa Portrait Reference are ARTIFACT_MODE calibration references.",
    "ARTIFACT_MODE encodes the artifact itself rather than inferring historical biological identity."
  ]
}