In order to concretely measure the ability of a SOAP implementation to work with other SOAP implementations, a set of tests have been devised by the SOAP developer's community to validate the interoperability of each SOAP platform.
This service has the same purpose as the Interoperability Test. Only difference is that SOAP clients that are only capable of understanding 1999 Schema information can be tested against this service in order to demonstrate the interoperability of XMLBus.