{
  "title": "entityMetadataItem",
  "type": "array",
  "items": [
    { "enum": ["entityMetadataItem"] },
    {
      "type": "object",
      "properties": {
        "compareTo":{"$ref": "definitions#/definitions/contextualizedFieldName"}
      },
      "required": ["compareTo"],
      "additionalProperties": false
    }
  ]
}