kilometer per liter

{
  "id": "NISTu380",
  "unitsml_id": "u:kilometer_per_liter",
  "name": "kilometer per liter",
  "names": [
    {
      "value": "kilometer per liter",
      "lang": "en"
    }
  ],
  "symbols": {
    "unicode": "km/L",
    "ascii": "km/L",
    "html": "km/L",
    "latex": "\\ensuremath{\\mathrm{km/L}}",
    "id": "km/L",
    "mathml": "<mrow><mi mathvariant='normal'>km</mi></mrow><mo>/</mo><mrow><mi mathvariant='normal'>L</mi></mrow>"
  },
  "identifiers": [
    {
      "type": "nist",
      "id": "NISTu380"
    },
    {
      "type": "unitsml",
      "id": "u:kilometer_per_liter"
    }
  ],
  "references": [],
  "short": "kilometer_per_liter",
  "root": false,
  "composite": true,
  "quantities": [
    {
      "id": "NISTq198",
      "name": "fuel efficiency",
      "type": "derived"
    }
  ],
  "dimension": {
    "id": "NISTd99",
    "name": "fuel efficiency",
    "expression": "L-2",
    "components": [
      {
        "key": "length",
        "symbol": "L",
        "power": -2
      }
    ],
    "dimensionless": false
  },
  "scale": {
    "id": "continuous_ratio",
    "name": "continuous ratio scale"
  },
  "systems": [
    {
      "id": "non-SI_acceptable",
      "name": "non-SI but acceptable",
      "short": "nonsi-acceptable",
      "acceptable": true
    }
  ],
  "root_units": [
    {
      "power": 1,
      "unit": {
        "id": "NISTu1",
        "name": "metre",
        "symbol": "m"
      },
      "prefix": {
        "id": "NISTp10_3",
        "name": "kilo",
        "symbol": "k"
      }
    },
    {
      "power": -1,
      "unit": {
        "id": "NISTu130",
        "name": "litre",
        "symbol": "L"
      },
      "prefix": null
    }
  ]
}