RDA: Resource Description and Access is a package of data elements, guidelines, and instructions for creating library and cultural heritage resource metadata that are well-formed according to international models for user-focused linked data applications.
DCRM(M) provides guidelines and instructions for descriptive cataloging of rare music, that is, music resources of any age or type of production receiving special treatment within a repository. Both printed and manuscript music resources are in scope. DCRM(M) may be used in conjunction with Descriptive Cataloging of Rare Materials (Serials) for the cataloging of rare music serials. Music found as examples in a printed monograph that is primarily textual and monographs about music are out of scope.