{"name": "haris","projects": [{"title": "Splunk"},{"title": "QRadar"},{"title": "LogAnalysis"}]}

{"name": "khalid","projects": [{"title": "MS"},{"title": "Google"},{"title": "Apple"}]}

{"name": "Hamid","projects": [{"title": "Toyota"},{"title": "Honda"},{"title": "Kia"}]

PUT index_name
{
   "mappings": {
      "iterations_type": {
         "properties": {
            "projects": {
               "type": "nested",
               "include_in_parent": true
            }
         }
      }
   }
}