Can schemas that occur as the content of an element of another vocabulary, such as Web Services Description Language or XForms, be checked without extracting them first?
Yes. Use the option -wsdl or -xform. If there is another vocabulary and you have the schema that describes it (the “schema” may appear as the content of an element), use option -emb. In this case, make sure that you also use option -schemaLocation namespace location or noNSSchemaLocation location to specify the location of the schema to which the root element conforms.