# Regular expression to convert case to Case, with exceptions

**URL:** https://community.mp3tag.de/t/regular-expression-to-convert-case-to-case-with-exceptions/6357
**Category:** Support
**Created:** [March 1, 2008, 4:30am UTC](https://community.mp3tag.de/t/regular-expression-to-convert-case-to-case-with-exceptions/6357 "2008-03-01T04:30:03Z")
**Posts on this page:** 1
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### Author: ![egd](https://community.mp3tag.de/letter_avatar_proxy/v4/letter/e/3da27b/32.png) [@egd](https://community.mp3tag.de/u/egd)
#### Post date: [March 1, 2008, 4:30am UTC](https://community.mp3tag.de/t/regular-expression-to-convert-case-to-case-with-exceptions/6357/1 "2008-03-01T04:30:03Z")

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Hi

Any idea how best to implement a regular expression or action to convert all words in all fields to "First Letter Caps" (other than the following [a, an, the, and, but, or, as, at, by, for, in, of, on, to], unless they are first word in the string)?

Thanks

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