Toby J. Teorey is a professor in the Electrical Engineering and Computer Science Department at the University of Michigan, Ann Arbor. He received his B.S. and M.S. degrees in electrical engineering from the University of Arizona, Tucson, and a Ph.D. in computer sciences from the University of Wisconsin, Madison. He was general chair of the 1981 ACM SIGMOD Conference and program chair for the 1991 Entity-Relationship Conference. Professor Teorey's current research focuses on database design and data warehousing, OLAP, advanced database systems, and performance of computer networks. He is a member of the ACM and the IEEE Computer Society. Stephen Buxton is Director of Product Management at Mark Logic Corporation. Stephen is a member of the W3C XQuery Working Group and a founder/member of the XQuery Full-Text Task Force. Stephen has written a number of papers and articles on XQuery and SQL/XML, and is an editor of several W3C XQuery Full-Text specs. Before joining Mark Logic, Stephen was Director of Product Management for Text and XML at Oracle Corporation. Dr. Terry Halpin is a professor at Northface University. He has led database research teams at several companies including Visio Corporation and Microsoft Corporation, where he worked on the conceptual and logical database modeling technology in Microsoft Visio for Enterprise Architects. His publications include over 100 technical papers and five books. Jan L. Harrington, the author of 30 books, including SQL, Clearly Explained (Academic Press), has been writing about databases since 1984. She is a professor and chair of the department of computer science and information systems at Marist College, where she teaches database design and management, object-oriented programming, data communications, and computer architecture. Sam Lightstone is a Senior Technical Staff Member and Development Manager with IBM's DB2 product development team. His work includes numerous topics in autonomic computing and relational database management systems. He is cofounder and leader of DB2's autonomic computing R&D effort. He is Chair of the IEEE Data Engineering Workgroup on Self Managing Database Systems and a member of the IEEE Computer Society Task Force on Autonomous and Autonomic Computing. In 2003 he was elected to the Canadian Technical Excellence Council, the Canadian affiliate of the IBM Academy of Technology. He is an IBM Master Inventor with over 25 patents and patents pending; he has published widely on autonomic computing for relational database systems. He has been with IBM since 1991. Jim Melton is editor of all parts of ISO/IEC 9075 (SQL) and is a representative for database standards at Oracle Corporation. Since 1986, he has been his company's representative to ANSI INCITS Technical Committee H2 for Database and a US representative to ISO/IEC JTC1/SC32/WG3 (Database Languages). In addition, Jim has participated in the W3C's XML Query Working Group since 1998 and is currently co-Chair of that Working Group. He is also Chair of the WG's Full-Text Task Force, co-Chair of the Update Language Task Force, and co-editor of two XQuery-related specifications. He is the author of several SQL books. Elizabeth O'Neil is also a professor of computer science at the University of Massachusetts at Boston. She serves as a consultant to Sybase IQ in Concord, Massachusetts, and has worked with a number of other corporations, including Microsoft and Bolt, Beranek, and Newman. From 1980 to 1998 she implemented and managed new hardware and software labs in the Computer Science Department of the University of Massachusetts at Boston. Patrick O'Neil is a professor of computer science at the University of Massachusetts at Boston. He is responsible for a number of important research results in transactional performance and disk access algorithms, and he holds patents for his work in these and other database areas. Author of "The Set Query Benchmark" (in The Benchmark Handbook for Database and Transaction Processing Systems, also from Morgan Kaufmann) and an area editor for Information Systems, O'Neil is also an active industry consultant who has worked with a number of prominent companies, including Microsoft, Oracle, Sybase, Informix, Praxis, Price Waterhouse, and Policy Management Systems Corporation. Markus Schneider is an Assistant Professor in the Computer Science Department of the University of Florida and holds a doctoral degree in Computer Science from the University of Hagen, Germany. He is author of a monograph in the area of spatial databases and of a German textbook on implementation concepts for database systems, and has published about 40 articles on database systems. He is on the editorial board of GeoInformatica. Graeme C. Simsion has over 25 years experience in information systems as a DBA, data modeling consultant, business systems designer, manager, and researcher. He is a regular presenter at industry and academic forums, and is currently a Senior Fellow with the Department of Information Systems at the University of Melbourne. Graham C. Witt is an independent consultant with over 30 years of experience in assisting enterprises to acquire relevant and effective IT solutions. His clients include major banks and other financial institutions; businesses in the insurance, utilities, transport and telecommunications sectors; and a wide variety of government agencies. A former guest lecturer on Database Systems at University of Melbourne, he is a frequent presenter at international data management conferences.