"The DCMI/RDA Task Group has been doing some testing of RDA data since last fall, based on several cataloging scenarios we developed with members of the community, using what we then knew about the RDA element set and roles vocabulary. The scenarios and testing are available at: http://dublincore.org/
As I'm sure you are aware, the RDA elements, roles and selected vocabularies are available on the NSDL Registry (http://metadataregistry.org), and they can be used by anyone. I'm happy to answer any questions about what's there, decisions that have been made about registration, what's missing, etc. Most of the work of registration and the wiki scenarios has been done with the help of Karen Coyle. Both of us are happy to be available to the testing group at any point.
co-chair, DCMI/RDA Task Group"