watt per square meter steradian

{
  "id": "NISTu14.u1e-2/1.u10e-1/1",
  "unitsml_id": "u:watt_per_square_meter_steradian",
  "name": "watt per square meter steradian",
  "names": [
    {
      "value": "watt per square meter steradian",
      "lang": "en"
    }
  ],
  "symbols": {
    "unicode": "W/(m²·sr)",
    "ascii": "W*m^-2*sr^-1",
    "html": "W/(m^2 · sr)",
    "latex": "\\ensuremath{\\mathrm{W/(m^2\\cdot sr)}}",
    "id": "W*m^-2*sr^-1",
    "mathml": "<mrow><mi mathvariant='normal'>W</mi><mo>/</mo><mrow><mo>(</mo><msup><mrow><mi mathvariant='normal'>m</mi></mrow><mrow><mn>2</mn></mrow></msup><mo>&#183;</mo><mi mathvariant='normal'>sr</mi><mo>)</mo></mrow></mrow>"
  },
  "identifiers": [
    {
      "type": "nist",
      "id": "NISTu14.u1e-2/1.u10e-1/1"
    },
    {
      "type": "unitsml",
      "id": "u:watt_per_square_meter_steradian"
    }
  ],
  "references": [
    {
      "type": "informative",
      "authority": "qudt",
      "uri": "http://qudt.org/vocab/unit/W-PER-M2-SR"
    }
  ],
  "short": "watt_per_square_meter_steradian",
  "root": false,
  "composite": true,
  "quantities": [
    {
      "id": "NISTq89",
      "name": "radiance",
      "type": "derived"
    }
  ],
  "dimension": {
    "id": "NISTd38",
    "name": "heat flux density",
    "expression": "M·T-3",
    "components": [
      {
        "key": "mass",
        "symbol": "M",
        "power": 1
      },
      {
        "key": "time",
        "symbol": "T",
        "power": -3
      }
    ],
    "dimensionless": false
  },
  "scale": {
    "id": "continuous_ratio",
    "name": "continuous ratio scale"
  },
  "systems": [
    {
      "id": "SI_derived_non-special",
      "name": "SI-derived units non-special",
      "short": "si-derived-nonspecial",
      "acceptable": true
    },
    {
      "id": "SI_compatible",
      "name": "Units compatible with SI",
      "short": "si-compatible",
      "acceptable": true
    }
  ],
  "root_units": [
    {
      "power": 1,
      "unit": {
        "id": "NISTu14",
        "name": "watt",
        "symbol": "W"
      },
      "prefix": null
    },
    {
      "power": -2,
      "unit": {
        "id": "NISTu1",
        "name": "metre",
        "symbol": "m"
      },
      "prefix": null
    },
    {
      "power": -1,
      "unit": {
        "id": "NISTu10",
        "name": "steradian",
        "symbol": "sr"
      },
      "prefix": null
    }
  ]
}