
The ID3v1 tag occupies 128 bytes, beginning with the string TAG 128 bytes from the end of the file. The method, now known as ID3v1, quickly became the de facto standard for storing metadata in MP3s. In 1996 Eric Kemp had the idea to add a small chunk of data to the audio file, thus solving the problem. The MP3 standard did not include a method for storing file metadata.

ID3v2 is structurally very different from ID3v1, consisting of an extensible set of "frames" located at the start of the file, each with a frame identifier (a three- or four-byte string) and one piece of data. ID3v1.1 is a slight modification which adds a "track number" field at the expense of a slight shortening of the "comment" field. ID3v1 takes the form of a 128- byte segment at the end of an MP3 file containing a fixed set of data fields.

There are two unrelated versions of ID3: ID3v1 and ID3v2. It allows information such as the title, artist, album, track number, and other information about the file to be stored in the file itself. ID3 is a metadata container most often used in conjunction with the MP3 audio file format. ( Learn how and when to remove this template message) JSTOR ( December 2013) ( Learn how and when to remove this template message).Unsourced material may be challenged and removed.

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