Using RDB for a large OWL-DL database.

Hello, All!

When I am thinking OWL, I cannot help worrying that inferencing a new concept or fact from complex and verbose OWL informal descriptions is more difficult than finding relationship from Relational Database, because of the concept of open world. 

I already know OWL is based on RDF and XML, but for a large amount of database it could be efficient to use Relational Database as DL-based database, if the transformation between OWL-DL and RDB is feasible and the inference in the RDB is enable. It is because nowadays RDB can be compatible with Web access.

Now, I have tested some OWL validator, also RDF validator which all are treating the description as low level material such as XML, RDF. Therefore, no semantic problem were not returned. 

If the transition is feasible and efficient, inference from RDB can be consistent and more, SQL can leverage to enable semantic validation by using a nested SQL query, number calculation, text search function, and the more.

How about this idea?

Is it valuable and valid in point of efficiency and integrity with Description Logic?