# Rewriting stripped tag info from filename & location

**URL:** <https://community.mp3tag.de/t/rewriting-stripped-tag-info-from-filename-location/52855>\
**Category:** Support\
**Created:** [April 16, 2021, 10:53pm UTC](https://community.mp3tag.de/t/rewriting-stripped-tag-info-from-filename-location/52855 "2021-04-16T22:53:19Z")\
**Posts on this page:** 1\
**Showing post:** 7

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**Author:** ![LyricsLover](https://community.mp3tag.de/letter_avatar_proxy/v4/letter/l/c6cbf5/32.png) [@LyricsLover](https://community.mp3tag.de/u/LyricsLover)\
**Post date:** [April 17, 2021, 1:22pm UTC](https://community.mp3tag.de/t/rewriting-stripped-tag-info-from-filename-location/52855/7 "2021-04-17T13:22:02Z")

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According to  
[https://wiki.hydrogenaud.io/index.php?title=Tag\_Mapping#Identifiers](https://wiki.hydrogenaud.io/index.php?title=Tag_Mapping#Identifiers)  
you could use CATALOGNUMBER  
or you follow this

> [@Help me map Vorbis to ID3v2](https://community.mp3tag.de/t/help-me-map-vorbis-to-id3v2/13664/5):
>
> ID3v2 has special [TXXX](http://www.id3.org/id3v2.3.0#head-29e37534e169ad913deb6a4fee345028f3db7c3f) (user defined) fields, which allow you to have fields of any name. In Mp3tag, if a name doesn't map to one of its recognized four-letter frame names, then Mp3tag will create a TXXX frame with that description. So you can write things like 'Catalog #' or "Catalog Number'. This is commonly how ReplayGain fields are written to ID3v2 tags - TXXX frames with descriptions of REPLAYGAIN\_TRACK\_GAIN, REPLAYGAIN\_ALBUM\_GAIN, etc.. You can read the ID3v2.3 and 2.4 specs [here](http://www.id3.org/Developer_Information), but th…

As @jewahe already told you, there is no standard field for CATALOG in ID3v2.3 or v2.4  
It depends on your playing software, if it reads your choosen tag for the catalog content.

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