"properties" : {
      "_content_type" : {
        "type" : "string"
      },
      "_name" : {
        "type" : "string"
      },
      "file" : {
        "type" : "attachment",
        "path" : "full",
        "fields" : {
          "file" : {
            "type" : "string",
            "term_vector" : "with_positions_offsets"
          },
          "author" : {
            "type" : "string"
          },
          "title" : {
            "type" : "string",
            "analyzer" : "english"
          },
          "name" : {
            "type" : "string"
          },
          "date" : {
            "type" : "date",
            "format" : "dateOptionalTime"
          },
          "keywords" : {
            "type" : "string",
            "analyzer" : "keyword",
            "store" : "yes"
          },
          "content_type" : {
            "type" : "string"
          }
        }
      },
      "summary_id" : {
        "type" : "string"
      },
      "title" : {
        "type" : "string",
        "analyzer" : "english"
      }
    }