# Which information retrieval model does ES used? **URL:** \ **Category:** Elasticsearch\ **Created:** [April 22, 2013, 8:00am UTC](https://discuss.elastic.co/t/which-information-retrieval-model-does-es-used/11653 "2013-04-22T08:00:34Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Jingang\_Wang](https://avatars.discourse-cdn.com/v4/letter/j/ce7236/32.png) [@Jingang\_Wang](https://discuss.elastic.co/u/Jingang_Wang)\ **Post date:** [April 22, 2013, 8:00am UTC](https://discuss.elastic.co/t/which-information-retrieval-model-does-es-used/11653/1 "2013-04-22T08:00:34Z")
Hi all, Does anybody know which information retrieval model is utilized in ES? TF\*IDF-based vector space model or some relevance-based language model？Could I change these model？ Thanks very much. -- 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). For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out). ---
**Author:** ![Rafal\_Kuc\_3](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/rafal_kuc_3/32/799_2.png) [@Rafal\_Kuc\_3](https://discuss.elastic.co/u/Rafal_Kuc_3)\ **Post date:** [April 22, 2013, 8:05am UTC](https://discuss.elastic.co/t/which-information-retrieval-model-does-es-used/11653/2 "2013-04-22T08:05:03Z")
Hello! In the 0.20.x (and before that) ElasticSeaerch uses the TF-IDF model, in 0.90 (for example in the 0.90 RC2) you'll be able to choose a different document ranking model ([http://www.elasticsearch.org/guide/reference/index-modules/similarity/](http://www.elasticsearch.org/guide/reference/index-modules/similarity/)). _--_ Regards, Rafał Kuć Sematext :: [http://sematext.com/](http://sematext.com/) _:: Solr - Lucene - Nutch - ElasticSearch_ Hi all, Does anybody know which information retrieval model is utilized in ES? TF\*IDF-based vector space model or some relevance-based language model？Could I change these model？ Thanks very much. -- 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). For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out). ---
**Author:** ![Jingang\_Wang](https://avatars.discourse-cdn.com/v4/letter/j/ce7236/32.png) [@Jingang\_Wang](https://discuss.elastic.co/u/Jingang_Wang)\ **Post date:** [April 22, 2013, 8:20am UTC](https://discuss.elastic.co/t/which-information-retrieval-model-does-es-used/11653/3 "2013-04-22T08:20:59Z")
Thanks for your reply. It's considerably helpful for me.​ On Mon, Apr 22, 2013 at 4:05 PM, Rafał Kuć [r.kuc@solr.pl](mailto:r.kuc@solr.pl) wrote: > Hello! > > In the 0.20.x (and before that) ElasticSeaerch uses the TF-IDF model, in > 0.90 (for example in the 0.90 RC2) you'll be able to choose a different > document ranking model ( > [Elasticsearch Platform — Find real-time answers at scale | Elastic](http://www.elasticsearch.org/guide/reference/index-modules/similarity/)). > > \*-- > Regards, > Rafał Kuć > Sematext :: _[http://sematext.com/](http://sematext.com/)_ :: Solr - Lucene - Nutch - > Elasticsearch > > - > > Hi all, > > Does anybody know which information retrieval model is utilized in ES? > TF\*IDF-based vector space model or some relevance-based language > model？Could I change these model？ > Thanks very much. > > -- > 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). > For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out). > > -- > You received this message because you are subscribed to a topic in the > Google Groups "elasticsearch" group. > To unsubscribe from this topic, visit > [https://groups.google.com/d/topic/elasticsearch/OSOvt1D1C5U/unsubscribe?hl=en-US](https://groups.google.com/d/topic/elasticsearch/OSOvt1D1C5U/unsubscribe?hl=en-US) > . > To unsubscribe from this group and all its topics, send an email to > [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). > For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out). -- Wang Jingang(王金刚) Ph.D. Candidate at Lab of High Volume Language Information Processing & Cloud Computing School of Computer Science Beijing Institute of Technology Beijing 100081 P.R China -- 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). For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out). ---
**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, 2:40am UTC](https://discuss.elastic.co/t/which-information-retrieval-model-does-es-used/11653/4 "2017-07-06T02:40:14Z")