{
  "$schema": "http://json-schema.org/draft-04/schema#",
  "description": "Common definitions - usage example: {'$ref': 'definitions.json#/uuid'} (swap quotes for double quotes)",
  "uuid": {
    "type": "string",
    "pattern": "^[a-fA-F0-9]{8}-[a-fA-F0-9]{4}-[a-fA-F0-9]{4}-[a-fA-F0-9]{4}-[a-fA-F0-9]{12}$"
  },
  "datetime": {
    "type": "string",
    "format": "date-time"
  }
}