json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "description": "A tag is some kind of a global keyword that could be set for some entries",
      "id": "http://schlothauer.de/schemas/shared/domain.json",
      "properties": {
          "active": {
              "type": "boolean"
          },
          "color": {
              "description": "color that marks this tag",
              "type": "string"
          },
          "comment": {
              "description": "Comment to that tab",
              "type": "string"
          },
          "created": {
              "_format": "datetime",
              "type": "string"
          },
          "group": {
              "description": "Short text that describes the tag",
              "type": "string"
          },
          "guid": {
              "_format": "uuid",
              "type": "string"
          },
          "internal": {
              "type": "boolean"
          },
          "text": {
              "description": "Short text that describes the tag",
              "type": "string"
          }
      },
      "required": [
          "guid",
          "text"
      ],
      "type": "object",
      "version": 1
  }