Don Box is a co-founder of DevelopMentor, a developer services company that provides education and support to the software industry at large. Dons research interests include component software integration, programming for concurrency, and XML-based serialization and metadata protocols. Don is also a co-author of the Simple Object Access Protocol specification and a member of the W3C Schemas Working Group. Don is the best-selling author of three Addison-Wesley titles. Aaron Skonnard is a member of the technical staff at DevelopMentor and a contributing editor to MSDN Magazine, where he writes The XML Files column. John Lam is a member of the technical staff at DevelopMentor and a contributor to PC and MSDN magazines.