Susie Stephens' post to public-semweb-lifesci is part of a discussion about using Oracle 10g's network data model in lifesciences. The pdf she pointed to is also worth looking at:

Subject Re: Chemistry and the Semantic Web

I've attached a document that gives a high level technical overview of
the Network Data Model (NDM) feature that is available as part of Oracle
Database 10g. I'd be happy to have individual discussions with people
who would like to learn more about our RDF plans. Source.

By way of Andrew Newman (check out his original post).

Perhaps this is not the most cost-effective approach, but I can see all sorts of uses for Oracle's NDM in online games. :)