{
  "fixture": "device-direct-b2-composition-v1",
  "catalogVersion": "ontology-core-v0.4-pre+device-domain-0.1.0",
  "project": { "entityId": "device.project", "sourceId": "device-project:robot2b-moscow" },
  "asset": { "entityId": "asset.asset", "sourceId": "asset:trike-001", "assetType": "trike" },
  "device": {
    "entityId": "device.tracking_device",
    "sourceId": "device:b2-001",
    "restrictedIdentifiers": [
      { "entityId": "device.restricted_identifier", "namespace": "imei", "valueExposure": "restricted" }
    ],
    "modelProfile": { "entityId": "device.model_profile", "sourceId": "model-profile:arnavi-b2-v1" }
  },
  "binding": {
    "entityId": "device.asset_binding",
    "sourceId": "device-asset-binding:b2-001:trike-001:20260822",
    "deviceSourceId": "device:b2-001",
    "assetSourceId": "asset:trike-001",
    "validFrom": "2026-08-22T00:00:00Z",
    "validTo": null,
    "provenance": "device-core-direct-enrollment"
  },
  "positionObservation": {
    "entityId": "observation.position_observation",
    "subjectSourceId": "asset:trike-001",
    "sourceDeviceId": "device:b2-001",
    "observedAt": "2026-08-22T10:00:00Z",
    "receivedAt": "2026-08-22T10:00:01Z",
    "projectionEntityId": "map.moving_object"
  },
  "assertions": [
    "asset.sourceId != device.sourceId",
    "imei is not an asset identifier",
    "binding is temporal and replaceable",
    "map subject is the asset",
    "Gelios connection is not required"
  ]
}