{
  "schema": "midget-round-vacuum-unit-evidence-v2",
  "units": "mm",
  "inspection_date": null,
  "photo_refs": [],
  "identity": {
    "current_presence": null,
    "readable_markings": null,
    "confirmed_function": null,
    "confirmed_part_number": null,
    "connection_trace": null
  },
  "evidence": {
    "method": null,
    "measurement_point_and_source_note": null
  },
  "frame": {
    "name": null,
    "origin_datum": null,
    "x_positive": null,
    "y_positive": null,
    "z_positive": null,
    "configuration": null,
    "right_handed_orthonormal": null
  },
  "dimensions_mm": {
    "maximum_cover_outside_diameter": null,
    "cover_axis_depth": null,
    "support_body_axis_extent": null
  },
  "survey": {
    "nominally_round_cover_confirmed": null,
    "cover_front_face_center_xyz_mm": null,
    "cover_rear_face_center_xyz_mm": null,
    "mounting_datum_xyz_mm": null,
    "ports": []
  },
  "limits": "Blank evidence record. The separate cover-survey tool can use direct named cover-face datums; no valve identity, engine registration, body or port geometry is inferred. Not engine-builder input or viewer geometry."
}