services/src/main/resources/META-INF/cxs/events/search.json

{
  "type": "search",
  "propertyTypes": [
    {
      "itemId": "properties",
      "type": "set",
      "childPropertyTypes": [
        {
          "itemId": "originForm",
          "type": "string"
        },
        {
          "itemId": "language",
          "type": "string"
        },
        {
          "itemId": "keyword",
          "type": "string"
        },
        {
          "itemId": "origin",
          "type": "string"
        }
      ]
    },
    {
      "itemId": "target",
      "type": "set",
      "childPropertyTypes": [
        {
          "itemId": "itemId",
          "type": "string"
        },
        {
          "itemId": "itemType",
          "type": "string"
        },
        {
          "itemId" : "customItemType",
          "type" : "string"
        },
        {
          "itemId": "scope",
          "type": "string"
        },
        {
          "itemId": "properties",
          "type": "set"
        }
      ]
    }
  ]
}