The Avalon Media System is an open source system for managing and providing access to large collections of digital audio and video. The project is led by the libraries of Indiana University Bloomington and Northwestern University and is funded in part by a two-year grant from The Andrew W. Mellon Foundation. Avalon is in the process of migrating digital repositories from Fedora 3 to Fedora 4 and incorporating metadata statements using the Resource Description Framework (RDF) instead of XML files accompanying the digital objects in the repository. Julie Hardesty at Indiana University and Jen Young at Northwestern University, the metadata portion of the Avalon project team, are working on a plan to migrate descriptive metadata from MODS XML to RDF. This talk will cover the planning process to date and how this step with Avalon informs a similar migration process of IU's digital library collections from Fedora 3 to Fedora 4.