问题
I'm looking for the ID3v2 documentation/norm. The official site id3.org seems to be unreachable. Is this specification still used ? (I'm wondering this because of the "downness" of the official website)
回答1:
The availability of any website is unbound to the use of any specification, because even if one or both of it become outdated all files that used it until that date won't disappear magically at that date - software still needs to expect old files that have been crafted when "old" specifications were in use.
As said in the comment: if you ever come across a dead link (and that is the case for quite a couple specs/manuals then search for exactly that URI in https://archive.org/ or one could even try Wikipedia: i.e. https://en.wikipedia.org/wiki/ID3 already explains v1.x completely.
This is a complete list of what to expect in MP3 files. The informal ones mostly rely on official ID3v1 or ID3v1.1 tags, but not always. ID3v2 can also be used in other files (i.e. AIFF, WAV, ASF, MP4). APE is intended for files APE, MPC, WV but not bound to - it can also appear in MP3:
- ID3v1 and ID3v1.1 = https://id3.org/ID3v1 or http://mpgedit.org/mpgedit/mpeg_format/mpeghdr.htm#MPEGTAG
- ID3v1.2 (informal) = http://www.birdcagesoft.com/ID3v12.txt
- ID3v2.2 = https://id3.org/id3v2-00
- ID3v2.3 = https://id3.org/id3v2.3.0
- ID3v2.4 = https://id3.org/id3v2.4.0-structure
- Lyrics3 (informal) = https://id3.org/Lyrics3
- Lyrics3v2 (informal) = https://id3.org/Lyrics3v2
- Enhanced TAG (informal) = https://web.archive.org/web/20120310015458/http://www.fortunecity.com/underworld/sonic/3/id3tag.html
- APEv1 = https://wiki.hydrogenaud.io/index.php?title=APEv1_specification
- APEv2 = https://wiki.hydrogenaud.io/index.php?title=APEv2_specification
来源：https://stackoverflow.com/questions/60791217/where-is-the-id3v2-documentation