In jboss-ejb-iiop_1_0.xsd, the "integrity", "confidentiality", "establish-trust-in-client", and "establish-trust-in-target" attributes on the "iorTransportConfigType" complexType, and the "auth-method", "realm" and "required" attributes on the "iorASContextType" complexType have both use="required" and a default attribute.

This does not make sense because default values are only applicable to optional attributes. I'm not sure which is correct, but either the attributes should be optional or the default values removed. This problem causes the XSD to not validate.