# Reference

**URL:** <https://discuss.elastic.co/t/reference/55531>\
**Category:** Elasticsearch\
**Created:** [July 14, 2016, 2:32pm UTC](https://discuss.elastic.co/t/reference/55531 "2016-07-14T14:32:20Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![yunstat](https://avatars.discourse-cdn.com/v4/letter/y/ecc23a/32.png) [@yunstat](https://discuss.elastic.co/u/yunstat)\
**Post date:** [July 14, 2016, 2:32pm UTC](https://discuss.elastic.co/t/reference/55531/1 "2016-07-14T14:32:20Z")

</div>

Hi, I am trying to find references about methodologies related "uncommonly common". could you suggest some keywords or literature? Thank you very much.

---

<div class="post-metadata">

**Author:** ![jettro](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jettro/32/3418_2.png) [@jettro](https://discuss.elastic.co/u/jettro)\
**Post date:** [July 14, 2016, 4:04pm UTC](https://discuss.elastic.co/t/reference/55531/2 "2016-07-14T16:04:04Z")

</div>

I would start with the docs in the reference guide:  
[https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-common-terms-query.html](https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-common-terms-query.html)

Another good read is the blog post:

> **[Stop Stopping Stop Words: a Look at Common Terms Query
	  	 | Elastic](https://www.elastic.co/blog/stop-stopping-stop-words-a-look-at-common-terms-query)**
>
> Stop words are a fundamental part of Information Retrieval lore. Common wisdom dictates that you should identify and remove stop words from your index. This increases both performance (fewer terms in ...

And finally the definitive guide:  
[https://www.elastic.co/guide/en/elasticsearch/guide/current/common-terms.html](https://www.elastic.co/guide/en/elasticsearch/guide/current/common-terms.html)

Not sure if this is what you mean.

---

<div class="post-metadata">

**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, 10:35pm UTC](https://discuss.elastic.co/t/reference/55531/3 "2017-07-05T22:35:32Z")

</div>

Closed on July 5, 2017, 10:35pm UTC