RDF/XML Syntax Specification (Revised) - new release.
Key changes :

Section 2 "An XML syntax for RDF" expanded with many more examples.
-- in particular we ask for feedback on this section since it has a
lot of new words and examples.

RDF typed literals added using a new rdf:datatype attribute.
-- so you can mark literals as being of type XSD integer, for example.

rdf:nodeID attribute added to allow referencing of blank nodes.
-- this makes going from RDF graphs to RDF/XML a lot easier

rdf:parseType="Collection" added for collections of nodes.
-- modelled after daml:Collection, generating a lisp-like triple
structure of rdf:first, rdf:rest, rdf:nil.

Some non-namespaced attributes were returned to the grammar:
ID, bagID, about, resource, parseType or type
-- this makes a lot of existing RDF/XML work without warnings.