level of a field quantity

{
  "id": "NISTq118",
  "unitsml_id": "q:level_of_a_field_quantity",
  "name": "level of a field quantity",
  "names": [
    {
      "value": "level of a field quantity",
      "lang": "en"
    }
  ],
  "short": "level_of_a_field_quantity",
  "type": "derived",
  "dimension": {
    "id": "NISTd83",
    "name": "level of field quantity",
    "expression": "1",
    "components": [],
    "dimensionless": true
  },
  "units": [
    {
      "id": "NISTu153",
      "name": "neper",
      "symbol": "Np"
    },
    {
      "id": "NISTu154",
      "name": "bel",
      "symbol": "B"
    }
  ],
  "unit_count": 2,
  "identifiers": [
    {
      "type": "nist",
      "id": "NISTq118"
    },
    {
      "type": "unitsml",
      "id": "q:level_of_a_field_quantity"
    }
  ],
  "references": []
}