Editing Vorbis (section)

===Metadata===
Vorbis [[metadata]], called [[Vorbis comment]]s, supports metadata tags similar to those implemented in the [[ID3]] standard for MP3. The metadata is stored in a vector of [[8-bit clean|byte strings]] of arbitrary length and size. The size of the vector and the size of each string in bytes is limited to 2<sup>32</sup> − 1 (about 4.3 [[1000000000 (number)|billion]], or any positive integer that can be expressed in 32 bits). This vector is stored in the second header packet that begins a Vorbis bitstream.<ref>{{cite web | url=http://www.xiph.org/vorbis/doc/v-comment.html | title=Vorbis Comment Field Documentation | access-date=2007-03-14 | author=Xiph.Org Foundation}}</ref>

The strings are assumed to be encoded as [[UTF-8]]. Music tags are typically implemented as strings of the form "[TAG]=[VALUE]", for instance, "ARTIST=The John Smith Band". The tag names are case-insensitive, thus typing "ARTIST=The John Smith Band" would be the same as "artist=The John Smith Band". Like the current version of ID3, users and encoding software are free to use whichever tags are appropriate for the content. For example, an encoder could use localized tag labels, live music tracks might contain a "Venue=" tag or files could have multiple genre definitions. Most applications also support common de facto standards such as disc number and [[ReplayGain]] information.