Kenneth B. Sall is an SAIC XML Data and Systems Analyst. He previously served as XML Specialist on the GSA Integrated Acquisition Environment eGov Initiative. Ken created the XML section of Web Developers Virtual Library. Addison-Wesley published his book, XML Family of Specifications: A Practical Guide, in June 2002. His personal Web site contains several useful XML resources including his unique Big Picture of the XML Family of Specifications, an imagemap gateway to all major XML technical specifications which also indicates their maturity and depicts interrelationships. Ken has been an active participant in the Federal CIO Council's XML Community of Practice, the Semantic Interoperability Community of Practice, the FEA Data Reference Model (DRM) Working Group, and in the E-Forms for E-Gov Pilots.