How much should RDF represent data ?

Hi,

I'd like to hear some comment on the following issue:
Where is the limit between information and meta-information in RDF ?

RDF can be used  to describe "resources" and meta-information  
relating them, but at the same time it can be used to "encapsulate"  
all infromation and not only meta-information (sorry for my wording,  
I hope this is understeandable enough).

Which do you think it's the most appropriate use ?

When RDF is used to represent OWL, there is also some easy  
misunderstanding possible, since a piece of information represented  
in a file is intuitevely closed-world. But this is may not really be  
important....

best,
Andrea