Schema for a message style service Document

Hi,

I have a message style web service where a DOM document (i.e. the SOAP Message's body) is passed as the request and response of that service method.

I was wondering if it still possible to check that DOM document against a schema at the WSDL level like you would an object in a document/literal wrapped style service?

Or if it is simply just a case of validating the DOM document once it is received by the service?

I hope my question makes some kind of sense and that someone can shed some light on my question...

Regards,

El Mono.