message: added categories to poi in search.json
diff: "$ref": "#/definitions/PointOfInterestCategorySet"
  }
  },
  + "categories": {
  + "description": "Categories array",
  + "type": "array",
  + "readOnly": true,
  + "items": {
  + "type": "string"
  + }
  + },
  "classifications": {
  "description": "Classification array",
  "type": "array",
  