{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "type": "object",
  "allOf": [
    {
      "$ref": "./AbstractDataComponent.json"
    },
    {
      "properties": {
        "referenceFrame": {
          "description": "Frame of reference (usually temporal or spatial) with respect to which the value of the component is expressed. A reference frame anchors a value to a real world datum.",
          "type": "string",
          "format": "uri-reference"
        },
        "axisID": {
          "description": "Specifies the reference axis (refer to CRS axisID). The reference frame URI should also be specified unless it is inherited from parent Vector",
          "type": "string",
          "minLength": 1
        },
        "quality": {
          "description": "Provides an indication of the reliability of the component value in the form of a decimal number (e.g. relative accuracy), a range (e.g. bidirectional tolerance), a categorical value (e.g. good, bad) or plain textual statement",
          "type": "array",
          "items": {
            "allOf": [
              {
                "$ref": "basicTypes.json#/definitions/AssociationAttributeGroup"
              },
              {
                "oneOf": [
                  {
                    "$ref": "Quantity.json"
                  },
                  {
                    "$ref": "QuantityRange.json"
                  },
                  {
                    "$ref": "Category.json"
                  },
                  {
                    "$ref": "Text.json"
                  }
                ]
              }
            ]
          }
        },
        "nilValues": {
          "description": "Defines reserved values with special meaning (e.g. missing, out-of-range, etc.)"
        },
        "constraint": {
        },
        "value": {
          "description": "Inline value(s) for the component. This property is optional to enable structure to act as a schema for values provided separately (e.g. in a datastream)"
        }
      }
    }
  ]
}