Muriel Foulonneau is project coordinator at the University of Illinois at Urbana-Champaign for the CIC-OAI metadata harvesting project. She has worked with practitioners and researchers in Europe and the United States to help implementing digital library applications. She has served as an evaluator for the Information Science and Technology R&D program of the European Commission. Jenn Riley is the Metadata Librarian for the Indiana University Digital Library Program, where she is responsible for planning metadata strategy for digital library projects. Jenn has been a leader in the development of a number of ground-breaking digital collections using metadata in novel ways to improve access to digital libraries.Jenn Riley and Muriel Foulonneau were both involved in the definition of best practices for shareable metadata for the Digital Library Federation. They have authored numerous practical guides and research articles on interoperability of digital content.