Typically, a federation of repositories consists of a number of participating Learning Object Repositories. The locations of those repositories and the description of the protocols they support for exposing their learning resources to the federation are maintained and managed at the federation level. This can either be managed:- By tools such as harvesters or federated search engines that connect the repositories to the federation, or- In a separate registry that manages this information for all the repositories on behalf of these tools.These registries are generally not available outside of the individual federation in which they operate. The obvious probl