Digital Archaeology and virtual heritage are not exactly equivalent but I have not seen a paper putting forward a clear definition and relationship. Perhaps that is why a Digital Heritage conference could be attended by archaeologists, archivists, museum experience people, interaction designers, programmers, scanning experts, librarians or museum people. Seldom are they all together, let alone in the same sessions.
If UNESCO and related organizations wish to preserve digital cultural heritage they will have to clearly distinguish between CAD model repositories and online web models (one can have both in one but is it too much of a compromise?)
Another issue is that charters developed for digital heritage, UNESCO digital heritage charter, London Charter, Seville Principles, Burra charter, ICOMOS Venice charter, are read but not used in the creation and storage of most projects.
My solution would be to build a template that is both a heuristics and an information collector that would be used to create suitable meta-tags and classification, based on a hybrid practical implementation of the charters as a query form that helps relate models to ontologies and to other digital collections.