The current implementation only allows for one given xsd schema.
I have some messages which have two namespaces. The outer schema declares some elements with lax processing.
By providing a http://static.springsource.org/spring-ws/sites/1.5/spring-xml/apidocs/org/springframework/xml/xsd/XsdSchemaCollection.html which references both schemas I would be able to validate the whole message - and not just the outermost one.
Either the existing implementation will have to be altered to allow for several paths, or it can be extended to reference a schemacollection.