{
    "properties" : {
        "event" : {
            "properties" : {
                "category" : {
                    "type" : "keyword"
                }
            }
        },
        "@timestamp" : {
            "type" : "date"
        },
        "description_nodoc" : {
            "type" : "integer",
            "doc_values" : false
        }
    }
}