An analysis of SOAP interoperability has been done by Arie Shoshani in Dec 2002. URLs pointing to SOAP interoperability are: http://www.cs.fsu.edu/~engelen/soap.html http://www.ppdg.net/mtgs/srm-4dec02-cern/SRM.issues.v2.1.draft2.pdf The latter URL contains a chart listing functionality across 16 different SOAP implementations on page 25. Reagan Moore