json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "id": "http://www.52north.org/schema/json/swe/Field#",
      "type": "object",
      "required": [
          "name",
          "type",
          "definition"
      ],
      "properties": {
          "name": {
              "type": "string"
          },
          "definition": {
              "type": "string"
          },
          "description": {
              "type": "string"
          },
          "type": {
              "type": "string"
          },
          "identifier": {
              "type": "string"
          },
          "label": {
              "type": "string"
          }
      },
      "oneOf": [
          {
              "properties": {
                  "type": {
                      "enum": [
                          "count",
                          "boolean",
                          "countRange",
                          "observableProperty",
                          "quality",
                          "text"
                      ]
                  }
              }
          },
          {
              "required": [
                  "uom"
              ],
              "properties": {
                  "type": {
                      "enum": [
                          "quantity",
                          "quantityRange",
                          "time",
                          "timeRange"
                      ]
                  },
                  "uom": {
                      "type": "string"
                  }
              }
          },
          {
              "required": [
                  "codespace"
              ],
              "properties": {
                  "type": {
                      "enum": [
                          "category"
                      ]
                  },
                  "codespace": {
                      "type": "string"
                  }
              }
          }
      ]
  }