# Technique for tagging classical music for itunes using grouping and movements for proper shuffling

**URL:** https://community.mp3tag.de/t/technique-for-tagging-classical-music-for-itunes-using-grouping-and-movements-for-proper-shuffling/47593
**Category:** Support
**Created:** [January 22, 2020, 2:56pm UTC](https://community.mp3tag.de/t/technique-for-tagging-classical-music-for-itunes-using-grouping-and-movements-for-proper-shuffling/47593 "2020-01-22T14:56:21Z")
**Posts on this page:** 1
**Showing post:** 3

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### Author: ![esumsea](https://community.mp3tag.de/user_avatar/community.mp3tag.de/esumsea/32/7219_2.png) [@esumsea](https://community.mp3tag.de/u/esumsea)
#### Post date: [January 22, 2020, 10:11pm UTC](https://community.mp3tag.de/t/technique-for-tagging-classical-music-for-itunes-using-grouping-and-movements-for-proper-shuffling/47593/3 "2020-01-22T22:11:58Z")

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> [@ohrenkino](#):
>
> > Do I continue to use the %work% field for work
> 
> %work% cannot be found in the list of standard fields - so it is most likely a user-defined field that will read only by very few players.
> 
> the field CONTENTGROUP is the MP3tag field that gets displayed as Work in iTunes. No mapping required.

Thanks again ohrenkino!  
I am confused as I see WORK (%work%) in Tag fields exclusive to MP4 in [Tag Field Mappings – Mp3tag Documentation](https://docs.mp3tag.de/mapping)

Since the only field mapping I did was the one above for ID3v2, do I have to do additional mapping or will I be fine with both MP4 and ID3v2 if I just use CONTENTGROUP (%contentgroup%) for work title?

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