Vorbis comment
A Vorbis comment is a metadata container used in the Ogg file format. It allows information such as the title, artist, album, track number or other information about the file to be added to the file itself. However, as the official Ogg Vorbis documentation notes, “ is meant for short, text comments, not arbitrary metadata; arbitrary metadata belongs in a separate logical bitstream that provides greater structure and machine parseability.” Instead, the intended function of Vorbis comments is to approximate the kind of information that might be hand-inked onto a blank faced CD-R or CD-RW: a few lines of notes briefly detailing the content.
Format
A Vorbis tag is a list of fields in the formatFieldName=Data. The field name can be composed of printable ASCII characters, 0x20 through 0x7D (‘