# UFID Fields

**URL:** <https://community.mp3tag.de/t/ufid-fields/17034>\
**Category:** Support\
**Created:** [July 8, 2015, 1:33am UTC](https://community.mp3tag.de/t/ufid-fields/17034 "2015-07-08T01:33:08Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![mregal](https://community.mp3tag.de/letter_avatar_proxy/v4/letter/m/5f9b8f/32.png) [@mregal](https://community.mp3tag.de/u/mregal)\
**Post date:** [July 8, 2015, 1:33am UTC](https://community.mp3tag.de/t/ufid-fields/17034/1 "2015-07-08T01:33:08Z")

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I'm creating a single UFID field using taglib-sharp and would like to add the field to my CustomExport.mte routine. What is the UFID field mapping name in Mp3tag? In other words Track = %track%, Title = %title%, UFID = ???

CustomExport.mte ...

$filename(Tags.txt,utf-8)$loop(%\_path%)%artist%^%album%^%discnumber%^%track%^%title%^%year%^%genre%^%albumartist%^%comment%^  
$loopend()

Please advise and thanks for all of your efforts Florian, mp3tag is great!

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**Author:** ![mregal](https://community.mp3tag.de/letter_avatar_proxy/v4/letter/m/5f9b8f/32.png) [@mregal](https://community.mp3tag.de/u/mregal)\
**Post date:** [July 8, 2015, 3:03am UTC](https://community.mp3tag.de/t/ufid-fields/17034/2 "2015-07-08T03:03:06Z")

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Figured it out! The UFID field maps to %uniquefileid%.

$filename(Tags.txt,utf-8)$loop(%\_path%)%uniquefileid%^%artist%^%album%^%discnumber%^%track%^%title%^%year%^%genre%^  
$loopend()

Once again, thanks for the really cool app!

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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:** [July 8, 2015, 7:16am UTC](https://community.mp3tag.de/t/ufid-fields/17034/3 "2015-07-08T07:16:45Z")

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> [@Sandal](#):
>
> I'm creating a single UFID field using taglib-sharp ... What is the UFID field mapping name in Mp3tag? ...

UFID ... see documentation of ID3v2.4 ...  
[http://id3.org/id3v2.4.0-frames](http://id3.org/id3v2.4.0-frames)

In Mp3tag this frame is mapped to the tag-field ... UNIQUEFILEID  
(not documented)

See also ...  
[https://www.google.de/search?q=site%3Aforum...de+UNIQUEFILEID](https://www.google.de/search?q=site%3Aforums.mp3tag.de+UNIQUEFILEID)

DD.20150708.1116.CEST

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**Author:** ![system](https://community.mp3tag.de/uploads/default/original/2X/c/ce7035d426cb755a7916793326d23b465222a407.png) [@system](https://community.mp3tag.de/u/system)\
**Post date:** [February 9, 2026, 12:25pm UTC](https://community.mp3tag.de/t/ufid-fields/17034/4 "2026-02-09T12:25:45Z")

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Closed on February 9, 2026, 12:25pm UTC