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elastic search query for synonym getting lower score in search

the first sample working query .. will be modified as per use case

PUT my_index4
{
   "settings": {
    "analysis": {
      "filter": {
        "arabic_stop": {
          "type":       "stop",
          "stopwords":  "_arabic_"
        },
        "arabic_keywords": {
          "type":       "keyword_marker",
          "keywords":   ["مثال"]
        },
        "arabic_stemmer": {
          "type":       "stemmer",
          "language":   "arabic"
        }
      },
      "analyzer": {
        "stemming_analyzer": {
          "tokenizer":  "standard",
          "filter": [
            "lowercase",
            "arabic_stop",
            "arabic_normalization",
            "arabic_keywords",
            "arabic_stemmer"
          ]
        },
        "synonym_analyzer": {
          "tokenizer":  "standard",
          "filter": [
            "lowercase",
            "arabic_stop",
            "arabic_normalization",
            "arabic_keywords",
            "arabic_stemmer"
          ]
        }
     
      }
    }
  },
  "mappings":{
    "blog":{
          "properties": {
    "title": {
        "type": "text",
        "fields": {
          "exact": {
            "type": "text"
         
          },       
          "synonym": {
            "type": "text",
         
            "analyzer": "synonym_analyzer"
          },
          "stemmed": {
            "type": "text",
         
            "analyzer": "stemming_analyzer"
          }
        }
      }
    }
    }

  }
}


original Query:
Doesnt work aboove elasticSearch 2.0

Link: https://stackoverflow.com/questions/28305250/elasticsearch-customize-score-for-synonyms-stemming?utm_medium=organic&utm_source=google_rich_qa&utm_campaign=google_rich_qa



PUT /<index_name>/<type_name>/_mapping
{
  "<type>": {
    "properties": {
      "title": {
        "type": "string",
        "fields": {
          "exact": {
            "type": "string",
            "index": "not_analyzed"
          },          
          "synonym": {
            "type": "string",
            "index": "analyzed",
            "analyzer": "synonym_analyzer"
          },
          "stemmed": {
            "type": "string",
            "index": "analyzed",
            "analyzer": "stemming_analyzer"
          }
        }
      }
    }
  }
}




Search
POST /<index_name>/<type_name>/_search
{
  "query": {
    "multi_match": {
      "query": "injury",
      "fields": [
        "title.exact^3",
        "title.synonym^2",
        "title.stemmed"
      ]
    }
  }
}
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