[cxml-devel] validating without parsing?

cxml and cxml-rng folks, I see that I can use a validator like so (from the examples): (cxml:parse-file "example.xml" (cxml-rng:make-validator (cxml-rng:parse-schema #p"example.rng") (cxml-dom:make-dom-builder))) But is there any way I can validate an already parsed (in-memory) XML (preferably STP) document? thanks, Cyrus