# Regular Expressions alternations in find AND replace

**URL:** https://community.mp3tag.de/t/regular-expressions-alternations-in-find-and-replace/55405
**Category:** Support
**Created:** [December 6, 2021, 7:08pm UTC](https://community.mp3tag.de/t/regular-expressions-alternations-in-find-and-replace/55405 "2021-12-06T19:08:10Z")
**Posts on this page:** 1
**Showing post:** 4

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### Author: ![Florian](https://community.mp3tag.de/user_avatar/community.mp3tag.de/florian/32/5759_2.png) [@Florian](https://community.mp3tag.de/u/Florian)
#### Post date: [December 7, 2021, 9:25am UTC](https://community.mp3tag.de/t/regular-expressions-alternations-in-find-and-replace/55405/4 "2021-12-07T09:25:36Z")

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> [@Which Regular Expression engine and syntax is used by Mp3tag?](https://community.mp3tag.de/t/which-regular-expression-engine-and-syntax-is-used-by-mp3tag/47713/4):
>
> I'm not using Perl (as the Perl engine) in Mp3tag — it's all C++. As regular expression engine I'm using Boost.Regex which has a perl regular expression syntax.

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