fuel efficiency

{
  "id": "NISTd99",
  "unitsml_id": "d:fuel_efficiency",
  "name": "fuel efficiency",
  "names": [
    {
      "value": "fuel efficiency",
      "lang": "en"
    }
  ],
  "expression": "L-2",
  "dimensionless": false,
  "components": [
    {
      "key": "length",
      "symbol": "L",
      "power": -2
    }
  ],
  "quantities": [
    {
      "id": "NISTq198",
      "name": "fuel efficiency"
    }
  ],
  "identifiers": [
    {
      "type": "nist",
      "id": "NISTd99"
    },
    {
      "type": "unitsml",
      "id": "d:fuel_efficiency"
    }
  ],
  "references": [
    {
      "type": "informative",
      "authority": "qudt",
      "uri": "http://qudt.org/vocab/dimensionvector/A0E0L-2I0M0H0T0D0"
    }
  ]
}