Re: RDF, RDFS, and OWL language constructs

Hi Frank!
 
Thanks for the help!
 
It seems to me that we have a divide between two Semantic Webs:

*	RDF + RDFS + OWL Full (the cumulation I mentioned: "OWL Full
contains all the OWL language constructs and provides free, unconstrained
use of RDF constructs.")
*	OWL DL and its subset OWL Lite

There is a lot in OWL DL that I like, but using OWL DL means de facto
throwing away RDF-RDFS (right?), and that seems not so nice.
 
It appears to me that this divide now forces us to make a very important
choice between the two, where I had expected a smooth upgrade path RDF >
RDFS > OWL Lite > OWL DL > OWL Full. Too logical (or naive), I presume.
 
Is there any way, e.g. a header, to tell the software whether you work in DL
or in Full?
 
Is there anything written on a migration path between the two in either
direction?
 
Regards,
Hans