radian per second squared

{
  "id": "NISTu9.u3e-2/1",
  "unitsml_id": "u:radian_per_second_squared",
  "name": "radian per second squared",
  "names": [
    {
      "value": "radian per second squared",
      "lang": "en"
    }
  ],
  "symbols": {
    "unicode": "rad/s²",
    "ascii": "rad*s^-2",
    "html": "rad/s<sup>2</sup>",
    "latex": "\\ensuremath{\\mathrm{rad/s^2}}",
    "id": "rad*s^-2",
    "mathml": "<mrow><mi mathvariant='normal'>rad</mi><mo>/</mo><msup><mrow><mi mathvariant='normal'>s</mi></mrow><mrow><mn>2</mn></mrow></msup></mrow>"
  },
  "identifiers": [
    {
      "type": "nist",
      "id": "NISTu9.u3e-2/1"
    },
    {
      "type": "unitsml",
      "id": "u:radian_per_second_squared"
    }
  ],
  "references": [
    {
      "type": "informative",
      "authority": "qudt",
      "uri": "http://qudt.org/vocab/unit/RAD-PER-SEC2"
    }
  ],
  "short": "radian_per_second_squared",
  "root": false,
  "composite": true,
  "quantities": [
    {
      "id": "NISTq58",
      "name": "angular acceleration",
      "type": "derived"
    }
  ],
  "dimension": {
    "id": "NISTd35",
    "name": "angular acceleration",
    "expression": "T-2",
    "components": [
      {
        "key": "time",
        "symbol": "T",
        "power": -2
      }
    ],
    "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": "NISTu9",
        "name": "radian",
        "symbol": "rad"
      },
      "prefix": null
    },
    {
      "power": -2,
      "unit": {
        "id": "NISTu3",
        "name": "second",
        "symbol": "″"
      },
      "prefix": null
    }
  ]
}