ID3 tags

- a metadata container most commonly used with MP3s

- stores information such as: title, artist, album, track number and other information about the file to be stored in the file itself

- two types of ID3 tag: ID3v1 and IDv2

ID3v1 tags

-occupies 128 bytes

-placed at the end of the mp3/mp4 file

- begins with the string TAG

- requires 30 bytes each for title, artist, album and a comment

- requires 40 bytes for the year

- requires 1 byte to identify the genre from a list of predfined values

- ID3v1.1 - added the ability to store track numbers


ID3v2

- no relation to ID3v1

- holds 256mb of information


Editing ID3 tags

- software called tag editors or taggers can be used to edit the metadata of an ID3 tag