David Orchard is a technical director in BEA Systems' CTO Office, focusing on Web
services standards. He is an elected member of the W3C Technical Architecture Group;
services Architecture, XML Protocol, and Advisory committees. He is currently or has
been a co-editor of the Web services Architecture, Web services Usage Scenarios,
WS-Coordination, WS-ReliableMessaging, WS-Addressing, SOAP-Conversation, XML Link,
XInclude specifications. He has written numerous technical articles and is a frequent
speaker on various Internet related technologies.
Articles by this author
A Theory of Compatible Versions
Creating XML languages that are compatible and extensible is a difficult problem.
This week David Orchard argues for a theory of compatibility in which he describes
the conditions for creating compatible XML languages.
Extensibility, XML Vocabularies, and XML Schema
David Orchard returns to the issue of extending and v ersioning XML vocabularies,
adding new information about language questions and the relationship between versioning
Versioning XML Vocabularies
A whitepaper presenting best practices for versioning W3C XML Schema based XML
vocabularies, describing techniques to achieve more effective loose coupling between
by increasing the possibility for backwards- and forwards-compatible changes to occur
related systems evolve.
Web Services Pitfalls
The web services vision of automated business sometimes sounds too good to be
true. This article puts web services in the context of real business concerns, showing
there's some way to go to achieve the vision.