# Empty tag-field in "FLAC / Vorbis Comment" tag?

**URL:** https://community.mp3tag.de/t/empty-tag-field-in-flac-vorbis-comment-tag/15332
**Category:** Off-Topic
**Created:** [December 27, 2013, 5:40pm UTC](https://community.mp3tag.de/t/empty-tag-field-in-flac-vorbis-comment-tag/15332 "2013-12-27T17:40:29Z")
**Posts on this page:** 1
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### Author: ![DetlevD](https://community.mp3tag.de/user_avatar/community.mp3tag.de/detlevd/32/123_2.png) [@DetlevD](https://community.mp3tag.de/u/DetlevD)
#### Post date: [December 27, 2013, 5:40pm UTC](https://community.mp3tag.de/t/empty-tag-field-in-flac-vorbis-comment-tag/15332/1 "2013-12-27T17:40:29Z")

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I have a simple question about the FLAC / Vorbis Comment tag.

Is it allowed that a "FLAC / Vorbis Comment" contains a tag field, which is empty?  
In German: Ist es erlaubt, dass ein "FLAC / Vorbis Comment" ein Tagfeld enthält, was leer ist?

I have to ask because there is a FLAC file, which contains four tag-fields ...  
ITEM1=""  
ITEM2="B"  
ITEM3="C"  
ITEM4=""  
... after applying the M3tag action "Import tag-fields (guess values)".

The four tag-fields have been created by the action "Import tag-fields (guess values)" using ...  
Source string: " ~~~B~~~ C~~~"  
Mask string: "%ITEM1% ~~~%ITEM2%~~~ %ITEM3%~~~%ITEM4%"  
(without the quotation marks).

I am surprised because it works differently than the MP3 tag.

When I open the dialog "Extend Tags..." and remove one of the two empty tag-fields, then both empty tag-fields will be removed at once.

It looks like a buggy behaviour in Mp3tag, but I am not sure because I do not know how Mp3tag works with the tags internally for MP3 and FLAC.

DD.20131227.1940.CET

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