# Elastic Search MLT API, how to use fields with weights **URL:** \ **Category:** Elasticsearch\ **Created:** [February 20, 2014, 11:10am UTC](https://discuss.elastic.co/t/elastic-search-mlt-api-how-to-use-fields-with-weights/15922 "2014-02-20T11:10:09Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Pir\_Abdul\_Rasool\_Qur](https://avatars.discourse-cdn.com/v4/letter/p/ac91a4/32.png) [@Pir\_Abdul\_Rasool\_Qur](https://discuss.elastic.co/u/Pir_Abdul_Rasool_Qur)\ **Post date:** [February 20, 2014, 11:10am UTC](https://discuss.elastic.co/t/elastic-search-mlt-api-how-to-use-fields-with-weights/15922/1 "2014-02-20T11:10:09Z")
Hi, I want to use ElasticSearch MLT API, to find a set of documents similar to a document in my index. Since, I do not have "like\_text" and do not want to make an extra request for retrieving "like text", I am using MLT API with document Id. The problem is that in our schema some fields weight more than other. For example, keywords\_1 has double weight than keywords\_2. Let us say I want to calculate "more like this" on these two fields, How can I do that? I have already tried using mlt\_fields=keywords\_1^2,keywords\_2 but it is not working as it is expected. On empirical testing it appears that it is treating both fields as equal. -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/665ae7cd-48b6-4776-b75c-d5cbb87e11ed%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/665ae7cd-48b6-4776-b75c-d5cbb87e11ed%40googlegroups.com). For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out). ---
**Author:** ![Binh\_Ly](https://avatars.discourse-cdn.com/v4/letter/b/ce7236/32.png) [@Binh\_Ly](https://discuss.elastic.co/u/Binh_Ly)\ **Post date:** [February 20, 2014, 3:20pm UTC](https://discuss.elastic.co/t/elastic-search-mlt-api-how-to-use-fields-with-weights/15922/2 "2014-02-20T15:20:36Z")
I do not believe you can boost individual fields/terms separately in a MLT query. Your best bet is to probably run a bool query of multiple MLT queries each with a different field and boost, but you'll need to first extract the MLT text before you can do this. -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/d3450173-b0af-4b8e-900c-54c68f2c382a%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/d3450173-b0af-4b8e-900c-54c68f2c382a%40googlegroups.com). For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out). ---
**Author:** ![Alex\_Ksikes1](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/alex_ksikes1/32/1534_2.png) [@Alex\_Ksikes1](https://discuss.elastic.co/u/Alex_Ksikes1)\ **Post date:** [May 6, 2014, 10:23am UTC](https://discuss.elastic.co/t/elastic-search-mlt-api-how-to-use-fields-with-weights/15922/3 "2014-05-06T10:23:23Z")
I'd like to add to this that mlt API is the same as a boolean query DSL made of multiple more like this field clauses, where each field is set to the content of the field of the queried document. On Thursday, February 20, 2014 4:20:36 PM UTC+1, Binh Ly wrote: > I do not believe you can boost individual fields/terms separately in a MLT > query. Your best bet is to probably run a bool query of multiple MLT > queries each with a different field and boost, but you'll need to first > extract the MLT text before you can do this. -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/2fcd0453-58dc-4a66-b7d9-2e785a2a7fa6%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/2fcd0453-58dc-4a66-b7d9-2e785a2a7fa6%40googlegroups.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 6, 2017, 1:31am UTC](https://discuss.elastic.co/t/elastic-search-mlt-api-how-to-use-fields-with-weights/15922/4 "2017-07-06T01:31:26Z")