# Lucene internal **URL:** \ **Category:** Elasticsearch\ **Created:** [April 27, 2016, 11:17pm UTC](https://discuss.elastic.co/t/lucene-internal/48608 "2016-04-27T23:17:09Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![theDtoWest](https://avatars.discourse-cdn.com/v4/letter/t/ecc23a/32.png) [@theDtoWest](https://discuss.elastic.co/u/theDtoWest)\ **Post date:** [April 27, 2016, 11:17pm UTC](https://discuss.elastic.co/t/lucene-internal/48608/1 "2016-04-27T23:17:09Z")
I am new to Elasticsearch and Lucene. Came across the presentation [What is in a Lucene index](http://www.slideshare.net/lucenerevolution/what-is-inaluceneagrandfinal). It is talking about what happens when a term query is issued from slide 28. My question is what version of Lucene this information is applicable to. We are using ES 1.5 which uses Lecene 4.10 I believe. Is this information relevant to our version? ---
**Author:** ![danielmitterdorfer](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/danielmitterdorfer/32/110510_2.png) [@danielmitterdorfer](https://discuss.elastic.co/u/danielmitterdorfer)\ **Post date:** [May 2, 2016, 12:17pm UTC](https://discuss.elastic.co/t/lucene-internal/48608/2 "2016-05-02T12:17:11Z")
Hi, Elasticsearch 1.5.0 uses Lucene 4.10.4 (which you can find out by issuing `curl http://es_host:es_port` (e.g. `curl http://localhost:9200`). Given that Lucene 4.10.4 is a bugfix release of Lucene 4.10, which was [released in September 2014](https://issues.apache.org/jira/browse/LUCENE/fixforversion/12327121/?selectedTab=com.atlassian.jira.jira-projects-plugin:version-summary-panel) and the talk was given in November 2013 the information in the talk should be applicable to you. Daniel ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 5, 2017, 10:54pm UTC](https://discuss.elastic.co/t/lucene-internal/48608/3 "2017-07-05T22:54:43Z")