Re: RDF vs RDBMS

Many key aspects have been mentionned so far.

I'd like to know what you guys think about modification possibilities of
ontologies (RDF model). RDF and SPARQL are great to query an existing
model, but what about creating, modifying or deleting some parts of it?
SPARQL has no INSERT or DELETE commands. 

Should it be understood that RDF is intended primarely as a query
technology?

As for now, the only way to modify RDF model is to go with API like
Jena, to remove the old statement and to reinsert it. It's a pain and
it's not really efficient.

Any advice?