The MusicBrainz XML Metadata Schema

This directory contains the official RELAX NG schema for the MusicBrainz XML Metadata format (MMD) and several sample files that can serve as test cases. MMD has been designed to represent music metadata and is used by the MusicBrainz web service.

Some older versions of the schema are included, too, but only schema/musicbrainz_mmd-2.0.rng is the official, current version.

Please note that the 2.0 version is continuously updated:

• 2 is the major version matching the MusicBrainz web service version;
• 0 was supposed to be the minor version, but has never been changed due to historical reasons. Please refer to the git tag instead.

Documentation and the latest revision can be found at https://musicbrainz.org/development/mmd/.

Questions about this format should be posted to the MusicBrainz forums (https://community.metabrainz.org) or brought up on our #metabrainz IRC channel.