# Ingest KV processor and pattern
**URL:** https://discuss.elastic.co/t/ingest-kv-processor-and-pattern/211157
**Category:** Elasticsearch
**Created:** [December 9, 2019, 4:46pm UTC](https://discuss.elastic.co/t/ingest-kv-processor-and-pattern/211157 "2019-12-09T16:46:22Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@rverchere](https://discuss.elastic.co/u/rverchere)
#### Post date: [December 9, 2019, 4:46pm UTC](https://discuss.elastic.co/t/ingest-kv-processor-and-pattern/211157/1 "2019-12-09T16:46:22Z")
Hello,
I'm trying to use the kv processor with patterns. As mentioned in the documentation, the "field\_split" can use a regex pattern to use for splitting key-value pairs, but I can't find examples.
I have a working PCRE regex here, tested from [https://regex101.com/:](https://regex101.com/:)
`(?!=)([a-zA-Z0-9.:\/]*=[a-zA-Z0-9.:\/ _-]*)( |$)`
But now how can I use it from the kv processor?
Thanks for your help!
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### Author:  [@rverchere](https://discuss.elastic.co/u/rverchere)
#### Post date: [December 9, 2019, 8:44pm UTC](https://discuss.elastic.co/t/ingest-kv-processor-and-pattern/211157/2 "2019-12-09T20:44:08Z")
Ok, found it, my regex was wrong, as it need to match the field\_split only (not a group):
`field_split" : "(?!\\w+=\\S+)\\s(?!\\w+\\s)`
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [January 6, 2020, 8:44pm UTC](https://discuss.elastic.co/t/ingest-kv-processor-and-pattern/211157/3 "2020-01-06T20:44:08Z")
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