  A new generation of digital repositories could be based on direct
representation of the contents with rich semantics and models rather than be
collections of documents. The contents of such repositories would be highly
structured which should help users to focus on meaningful relationships of the
contents. These repositories would implement earlier proposals for
model-oriented information organization by extending current work on ontologies
to cover state changes, instances, and scenarios. They could also apply other
approaches such as object-oriented design and frame semantics. In addition to
semantics, the representation needs to allow for discourse and repository
knowledge-support services and policies. For instance, the knowledge base would
need to be systematically updated as new findings and theories reshape it.
