{
  "props": {
    "element_name": {
      "type": "String",
      "trim": true,
      "_m_category": "element name",
      "index": true
    },
    "element_properties": {
      "type": "String",
      "trim": true,
      "_m_category": "element properties"
    }
  },
  "index": {
    "element_name": "text"
  }
}