Poisson number

{
  "id": "NISTq140",
  "unitsml_id": "q:poisson_number",
  "name": "Poisson number",
  "names": [
    {
      "value": "Poisson number",
      "lang": "en"
    }
  ],
  "short": "poisson_number",
  "type": "derived",
  "dimension": {
    "id": "NISTd80",
    "name": "ratio quantity",
    "expression": "1",
    "components": [],
    "dimensionless": true
  },
  "units": [
    {
      "id": "NISTu61",
      "name": "one",
      "symbol": "1"
    }
  ],
  "unit_count": 1,
  "identifiers": [
    {
      "type": "nist",
      "id": "NISTq140"
    },
    {
      "type": "unitsml",
      "id": "q:poisson_number"
    }
  ],
  "references": [
    {
      "type": "informative",
      "authority": "qudt",
      "uri": "http://qudt.org/vocab/quantitykind/PoissonRatio"
    }
  ]
}