# Question About Lucene TokenStream DAGs

**URL:** <https://discuss.elastic.co/t/question-about-lucene-tokenstream-dags/186936>\
**Category:** Elasticsearch\
**Created:** [June 21, 2019, 9:51pm UTC](https://discuss.elastic.co/t/question-about-lucene-tokenstream-dags/186936 "2019-06-21T21:51:21Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![dvisz-inf](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dvisz-inf/32/42617_2.png) [@dvisz-inf](https://discuss.elastic.co/u/dvisz-inf)\
**Post date:** [June 21, 2019, 9:51pm UTC](https://discuss.elastic.co/t/question-about-lucene-tokenstream-dags/186936/1 "2019-06-21T21:51:21Z")

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Just came across this article:

Does anyone happen to know if this remains relevant today?

Thanks!

> **[Lucene's TokenStreams are actually graphs!](http://blog.mikemccandless.com/2012/04/lucenes-tokenstreams-are-actually.html)**
>
> Lucene's TokenStream class produces the sequence of tokens to be indexed for a document's fields. The API is an iterator: you call increme...

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [July 19, 2019, 9:51pm UTC](https://discuss.elastic.co/t/question-about-lucene-tokenstream-dags/186936/2 "2019-07-19T21:51:29Z")

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Closed on July 19, 2019, 9:51pm UTC

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