# Tagging/categorizing documents with customized rules

**URL:** <https://discuss.elastic.co/t/tagging-categorizing-documents-with-customized-rules/89162>\
**Category:** Elasticsearch\
**Created:** [June 13, 2017, 9:29am UTC](https://discuss.elastic.co/t/tagging-categorizing-documents-with-customized-rules/89162 "2017-06-13T09:29:22Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![yqchen82](https://avatars.discourse-cdn.com/v4/letter/y/e9a140/32.png) [@yqchen82](https://discuss.elastic.co/u/yqchen82)\
**Post date:** [June 13, 2017, 9:29am UTC](https://discuss.elastic.co/t/tagging-categorizing-documents-with-customized-rules/89162/1 "2017-06-13T09:29:22Z")

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hi, am i able to categorize incoming documents with a list of matching keywords before the document gets indexed?

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**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\
**Post date:** [June 13, 2017, 9:45am UTC](https://discuss.elastic.co/t/tagging-categorizing-documents-with-customized-rules/89162/2 "2017-06-13T09:45:49Z")

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You can use percolator feature for that use case.

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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 11, 2017, 9:45am UTC](https://discuss.elastic.co/t/tagging-categorizing-documents-with-customized-rules/89162/3 "2017-07-11T09:45:49Z")

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