Roots of Web Services

From Infoworld's Web Services Report...

This declarative approach is the real essence of SOA, and of course it's not a new idea. I trace its lineage to MTS (Microsoft Transaction Server), which begat COM+ and J2EE. All these middleware technologies pull services (e.g., transaction management, connection pooling) out of components, and weave them into to the fabric in which the components are deployed.

We can (and should) go even 30 years back to discover some deeper roots of Web Services that run through but do not originate with MTS...

• CORBA 1.0 in 1991 was based on several earlier efforts from the 1980s.
• The modern transactional aspects have their roots deeper still at AT&T more than 20 years ago.
• Tuxedo is itself influenced by IMS in the 1970s.