elasticsearch multi field type

http://www.elasticsearch.org/guide/reference/mapping/multi-field-type.html

It needs a sorting field.

"subject": { "type": "multi_field", "fields": { "subject": { "type": "string", "index": "analyzed", "store": "yes", "analyzer": "kr_analyzer" }, "sort_subject": { "include_in_all": false, "type": "string", "index": "not_analyzed", "store": "yes" } } },