# Which Regex flavor does Xbench use?

**URL:** <https://forum.xbench.net/t/which-regex-flavor-does-xbench-use/48>\
**Category:** Technical Support\
**Created:** [February 9, 2016, 10:23pm UTC](https://forum.xbench.net/t/which-regex-flavor-does-xbench-use/48 "2016-02-09T22:23:09Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![pcondal](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.xbench.net/pcondal/32/305_2.png) [@pcondal](https://forum.xbench.net/u/pcondal)\
**Post date:** [February 9, 2016, 10:29pm UTC](https://forum.xbench.net/t/which-regex-flavor-does-xbench-use/48/2 "2016-02-09T22:29:35Z")

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Xbench uses POSIX ERE flavor with two “syntactic sugar” exceptions:

- `<` and `>` are word delimiters as syntactic sugar (instead of `[:<:]` and `[:>:]`).
- Classes can be specified directly (for example `[:digit:]` ), instead of enclosed in a set (`[[:digit:]]`).

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