{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "schema:Quantity",
  "title": "Quantity",
  "description": "Quantities such as distance, time, mass, weight, etc. Particular instances of say Mass are entities like '3 kg' or '4 milligrams'.",
  "type": "object",
  "allOf": [
    {
      "description": "A utility class that serves as the umbrella for a number of 'intangible' things such as quantities, structured values, etc.",
      "$ref": "schema:Intangible"
    }
  ]
}