The music metadata XML structure (MMD) is divided into two mandatory main sections. We defined a section for Albums and a section for tracks. A non mandatory labelinfo section can be used to inlcude additional label specific information. For further information please check out our latest format-description (Excel file), or see the sample XML file.
There is also a XSD Schema available which can be used for verifying the datastructure. The Namespace URI for this is: http://MusicMetaData.org/mmdSchema
If you are interested in joining the project, please drop us a line. All input we receive is much appreciated. If you have any suggestions on fields to add to this project then please post them as comments on this page, or send them via the contact form.