# Grok Expression

**URL:** <https://discuss.elastic.co/t/grok-expression/31583>\
**Category:** Logstash\
**Created:** [October 3, 2015, 4:56pm UTC](https://discuss.elastic.co/t/grok-expression/31583 "2015-10-03T16:56:21Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![DocMAX](https://avatars.discourse-cdn.com/v4/letter/d/6bbea6/32.png) [@DocMAX](https://discuss.elastic.co/u/DocMAX)\
**Post date:** [October 3, 2015, 4:56pm UTC](https://discuss.elastic.co/t/grok-expression/31583/1 "2015-10-03T16:56:21Z")

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HI,

I have

test[1234]

and

test

In both cases i need test as source field

Shouldn't this work?

%{NOTSPACE:process}(?:\[.+\])

I have no match with "test" only.

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<div class="post-metadata">

**Author:** ![DocMAX](https://avatars.discourse-cdn.com/v4/letter/d/6bbea6/32.png) [@DocMAX](https://discuss.elastic.co/u/DocMAX)\
**Post date:** [October 3, 2015, 9:11pm UTC](https://discuss.elastic.co/t/grok-expression/31583/2 "2015-10-03T21:11:19Z")

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found it

(?^[^[]]+)

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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 6, 2017, 5:27am UTC](https://discuss.elastic.co/t/grok-expression/31583/3 "2017-07-06T05:27:24Z")

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Closed on July 6, 2017, 5:27am UTC