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highlight text in elasticsearch result

Example

PUT test_index/_doc/doc1
{
  "content" : "For you I'm only a fox like a hundred thousand other foxes. But if you tame me, we'll need each other. You'll be the only boy in the world for me. I'll be the only fox in the world for you."
}




GET test_index/_search
{
    "query": {
        "match_phrase" : {"content" : "only fox"}
    },
    "highlight": {
        "type" : "unified",
        "number_of_fragments" : 3,
        "fields": {
            "content": {}
        }
    }
}

----------------------
for deepdive
"highlight": {
    "fields": {
      "script": {}
    }
  }
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