# Can't add more than one WWW tag info WMA file. Is it correct?

**URL:** https://community.mp3tag.de/t/cant-add-more-than-one-www-tag-info-wma-file-is-it-correct/70147
**Category:** Support
**Created:** [November 15, 2025, 7:33pm UTC](https://community.mp3tag.de/t/cant-add-more-than-one-www-tag-info-wma-file-is-it-correct/70147 "2025-11-15T19:33:27Z")
**Posts on this page:** 1
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### Author: ![Florian](https://community.mp3tag.de/user_avatar/community.mp3tag.de/florian/32/5759_2.png) [@Florian](https://community.mp3tag.de/u/Florian)
#### Post date: [November 16, 2025, 2:31pm UTC](https://community.mp3tag.de/t/cant-add-more-than-one-www-tag-info-wma-file-is-it-correct/70147/8 "2025-11-16T14:31:03Z")

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WMA tags are a little special when it comes to supporting multiple values. There is a list from Microsoft that details which fields actually support multiple values

> **[Attributes with Multiple Values (Windows Media Format 11 SDK) - Win32 apps](https://learn.microsoft.com/en-us/windows/win32/wmformat/attributes-with-multiple-values)**
>
> Learn about attributes with multiple values in the Windows Media Format 11 SDK. Some media item attributes can have multiple values.

However, not all are supported by Mp3tag (e.g., the `WM/UserWebURL` field is a binary field that currently isn't).

For a complete list refer to the official Mp3tag mapping, where supported fields have an entry at ASF/Windows Media, e.g., `WM/AlbumArtist`.

> **[Tag Field Mappings – Mp3tag Documentation](https://docs.mp3tag.de/mapping/)**
>
> Overview of all available tag fields, their names in Mp3tag, and how they are mapped to the internal structures of the different tag formats. Mp3tag is the universal Tag Editor.

* * *

As for support for `WWW` in ID3v2, it internally maps to `WXXX` which is defined as

> This frame is intended for URL links concerning the audio file in a similar way to the other "W"-frames. The frame body consists of a description of the string, represented as a terminated string, followed by the actual URL. The URL is always encoded with ISO-8859-1. **There may be more than one "WXXX" frame in each tag, but only one with the same description.**

This means, you can only one `WWW` field to an ID3v2 tag (e.g., in MP3s or WAVs ID3 chunk) with an empty description. If you intend to use more than one of such fields, you need to use a different description.

In Mp3tag, such descriptions can be added as part of the field name, e.g,  
`WWW DESCRIPTION` = `Field contents`

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