# mass deleting partial info in tag field
**URL:** https://community.mp3tag.de/t/mass-deleting-partial-info-in-tag-field/11530
**Category:** Support
**Created:** [February 2, 2011, 5:34pm UTC](https://community.mp3tag.de/t/mass-deleting-partial-info-in-tag-field/11530 "2011-02-02T17:34:35Z")
**Posts on this page:** 7
**Page:** 1
### Author:  [@SB1](https://community.mp3tag.de/u/SB1)
#### Post date: [February 2, 2011, 5:34pm UTC](https://community.mp3tag.de/t/mass-deleting-partial-info-in-tag-field/11530/1 "2011-02-02T17:34:35Z")
Hi guys,
I want to remove a certain part of info in the comment field on a batch of files. Examples:
7A - Coocon Recordings
I only want to remove Cocoon Recordings, so keeping 7A - .
5A/6A - Mouseville
Only want to keep 5A/6A - .
I'm not sure how to do this with actions. Any ideas?
---
### Author:  [@pone](https://community.mp3tag.de/u/pone)
#### Post date: [February 2, 2011, 6:07pm UTC](https://community.mp3tag.de/t/mass-deleting-partial-info-in-tag-field/11530/2 "2011-02-02T18:07:31Z")
Action: Foramt Value
Field: COMMENT
Formatstring: $regexp(%comment%,(.\* - ).\*,$1)
or, if you want to delete " - " also (which would make sense to me):
Formatstring: $regexp(%comment%,(._) - ._,$1)
---
### Author:  [@SB1](https://community.mp3tag.de/u/SB1)
#### Post date: [February 2, 2011, 6:22pm UTC](https://community.mp3tag.de/t/mass-deleting-partial-info-in-tag-field/11530/3 "2011-02-02T18:22:48Z")
I actually want to keep the " - " part so I can easily type any additional things in the comments with a clear division between that and the Key stuff (4A etc.).
I tried the first one, didn't work. Nothing changed.
The second one worked on the first example, but not on the second one.
I have no knowledge of regexp at al so can't really think how to fix that. Any ideas?
**Edit:**
Sorry, the field actually looks like this, so with another " - " at the end:
example1: 7A - Coocon Recordings -
example2: 5A/6A - Mouseville -
Only want to keep:
7A -
5A/6A -
---
### Author:  [@pone](https://community.mp3tag.de/u/pone)
#### Post date: [February 2, 2011, 6:32pm UTC](https://community.mp3tag.de/t/mass-deleting-partial-info-in-tag-field/11530/4 "2011-02-02T18:32:41Z")
> [@SB1](#):
>
> **Edit:**
>
> Sorry, the field actually looks like this, so with another " - " at the end:
That's an important info. Here's your format string:
$regexp(%comment%,(._? - )._,$1)
EDIT:
here's your knowledge:
[https://docs.mp3tag.de/actions/replace-regexp](https://docs.mp3tag.de/actions/replace-regexp)
[https://docs.mp3tag.de/scripting](https://docs.mp3tag.de/scripting)
---
### Author:  [@SB1](https://community.mp3tag.de/u/SB1)
#### Post date: [February 2, 2011, 6:35pm UTC](https://community.mp3tag.de/t/mass-deleting-partial-info-in-tag-field/11530/5 "2011-02-02T18:35:25Z")
> [@pone](#):
>
> That's an important info. Here's your format string:
> $regexp(%comment%,(._? - )._,$1)
Thank you so much!
Was fiddling around with the string you gave earlier but couldn't get it right.
---
### Author:  [@DetlevD](https://community.mp3tag.de/u/DetlevD)
#### Post date: [February 2, 2011, 7:07pm UTC](https://community.mp3tag.de/t/mass-deleting-partial-info-in-tag-field/11530/6 "2011-02-02T19:07:14Z")
> [@SB1](#):
>
> I actually want to keep the " - " part so I can easily type any additional things in the comments with a clear division between that and the Key stuff (4A etc.). ...
> example1: 7A - Coocon Recordings -
> example2: 5A/6A - Mouseville -
> Only want to keep:
> 7A -
> 5A/6A -
Begin Action Group **Test\_2011#20110202.SB1**
Action #1
_Actiontype 5:_ **Format value**
_Field:_ **COMMENT**
_Formatstring:_ **$left(%COMMENT%,$add($strstr(%COMMENT%,' - '),2))**
End Action Group **Test\_2011#20110202.SB1** (1 Action)
DD.20110202.2107.CET
---
### Author:  [@system](https://community.mp3tag.de/u/system)
#### Post date: [February 9, 2026, 12:22pm UTC](https://community.mp3tag.de/t/mass-deleting-partial-info-in-tag-field/11530/7 "2026-02-09T12:22:52Z")