# RegExp in multiline field
**URL:** https://community.mp3tag.de/t/regexp-in-multiline-field/6928
**Category:** Support
**Created:** [June 9, 2008, 1:41pm UTC](https://community.mp3tag.de/t/regexp-in-multiline-field/6928 "2008-06-09T13:41:24Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@DetlevD](https://community.mp3tag.de/u/DetlevD)
#### Post date: [June 9, 2008, 1:41pm UTC](https://community.mp3tag.de/t/regexp-in-multiline-field/6928/1 "2008-06-09T13:41:24Z")
RegExp in multiline field
When using Mp3tag's regexp functionality how can it be realized to remove trailing CRLF sequence in a multi-line tag field without touching any other CRLF sequences in the text stream?
Symbolic text stream in multi-line field:
_ **CRLFCRLF** CRLF_
Only the trailing CRLF sequence in the above example should be removed to become:
_ **CRLFCRLF** _.
See following actionsgroup as an example:
Begin Actionsgroup **TEST**
Action #1
_Actiontype 5:_ **Format tag field**
_Field:_ **TEST\_1**
_Formatstring:_ **\*\*\*$char(13)$char(10)$char(13)$char(10)\*\*\*$char(13)$char(10)**
Action #2
_Actiontype 5:_ **Format tag field**
_Field:_ **TEST\_2**
_Formatstring:_ **$regexp(%TEST\_1%,\r\n$,)**
Action #3
_Actiontype 5:_ **Format tag field**
_Field:_ **TEST\_3**
_Formatstring:_ **%TEST\_1%**
Action #4
_Actiontype 4:_ **Replace with regular expression**
_Field:_ **TEST\_3**
_Regular expression:_ **\r\n$**
_Replace matches with:_
[\_] case sensitive comparison
End Actionsgroup **TEST** (4 Actions)
Action #2 and #4 give the same result value:
_\*\*\*$char(13)$char(10)\*\*\*_
It should be:
_\*\*\*$char(13)$char(10)$char(13)$char(10)\*\*\*_
But how?
DD.20080609.1740.CEST
---
### Author:  [@DetlevD](https://community.mp3tag.de/u/DetlevD)
#### Post date: [June 9, 2008, 4:22pm UTC](https://community.mp3tag.de/t/regexp-in-multiline-field/6928/2 "2008-06-09T16:22:24Z")
> [@DetlevD](#):
>
> ... It should be:
> _**$char(13)$char(10)$char(13)$char(10)**_
Well, I got it for myself:
$regexp(_**$char(13)$char(10)$char(13)$char(10)**_$char(13)$char(10),\r\n **\Z** ,)
gives
_**$char(13)$char(10)$char(13)$char(10)**_
DD.20080609.2022.CEST
---
### Author:  [@system](https://community.mp3tag.de/u/system)
#### Post date: [February 9, 2026, 12:21pm UTC](https://community.mp3tag.de/t/regexp-in-multiline-field/6928/3 "2026-02-09T12:21:00Z")