Explicit mapping

gistfile1.json

"properties" : {
    "message" : {"type" : "string", "search_analyzer" : "msg_search_analyzer", "index_analyzer" : "msg_index_analyzer"},
    "file" : {"type" : "string", "analyzer" : "simple"},
    "api-key": {"type" : "string", "index" : "not_analyzed"},
    ...
    "osver" : {"type" : "string", "index" : "not_analyzed"},             
    "customdata" : {"type" : "string", "analyzer" : "simple"},
    "updated" : {"type":"date", "format":"date"}
}