XML document types cannot be made publishable. That is, an XML document type cannot become a publishable document type.

XML document type cannot be used in web services, which includes the signatures of services used as operations, headers, faults, and the pub.soap.handler* services.

XML document types cannot be used as the top-level element in a service signature. That is, on the Input/Output tab, you cannot specify an XML document type for the Input field or Output field.

XML document types should not be created from an XML schema definition in an Event Type Store.

XML document types should not be created from e-forms.