Chapter 11, "Transactions," is a senior technical staff member in the Emerging Technology group at IBM. He has worked extensively in the areas of transaction systems and Web services and has participated in the development of standards for OMG, Java, and Web Services. These specifications include the OMG/Object Transaction Service, the J2EE/Java Transaction Service, and Web Service's WS-Coordination, WS-AtomicTransaction, and WS-BusinessActivity. You can contact Tom at Chapter 7, "Web Services Policy," is a senior technical staff member at IBM, having joined IBM/Lotus in 1996. Her previous background includes work for HP on DCE- and PKI-based Single SignOn, for Digital on a B1/CMW operating system, and for AT&T Bell Labs on B2 UNIX. Currently, she is the security architect for emerging technology at IBM, concentrating on XML security. Maryann is one of the coauthors of the WS-Security, Policy, Trust, and Secure Conversation specifications announced by IBM and other business partners. Before joining the emerging technology group, she managed the IBM Tivoli Jonah team (IETF PKIX reference implementation) and was security architect for Lotus e-Suite, participating in the development of Java Security (JAAS). Send e-mails to Maryann at John Ibbotson is a member of the Emerging Technology Services group based at the Hursley Development Laboratory near Winchester in the UK. He is the IBM prime representative on the World Wide Web Consortium (W3C) XML Protocol Working Group that is standardizing SOAP, a key component of the Web services architecture. He is also a coauthor of the WS-ReliableMessaging specification. Earlier in his career, John developed scientific image-processing systems and digital libraries. John is a Chartered Engineer and Fellow of the Institution of Electrical Engineers (IEEE). You can contact him at Rania Khalaf is a software engineer in the Component Systems group at the IBM T.J. Watson Research Center. She received her bachelor's and master's degrees in computer science and electrical engineering from MIT in 2000 and 2001. Rania is a codeveloper and coarchitect of the IBM BPEL4WS prototype implementation (BPWS4J). She is an active member of the OASIS WS-BPEL Technical Committee standardizing BPEL. She has published numerous papers in the field and has served on the program committees of conferences and workshops. Rania is currently pursuing her Ph.D. studies under Professor Dr. Frank Leymann with the University of Stuttgart. Rania can be contacted at Dieter König is a software architect for workflow systems at the IBM Germany Development Laboratory. He joined the laboratory in 1988 and has worked at the Resource Measurement Facility for z/OS, MQSeries Workflow, and WebSphere Process Choreographer. Dieter is a member of the OASIS WS-BPEL Technical Committee, which is working toward an industry standard for Web Services Business Process Execution Language (WS-BPEL). He holds a master's degree (Diploma in Informatics) in computer science from the University of Bonn, Germany. You can contact him at Hiroshi Maruyama is a Distinguished Engineer at the IBM Tokyo Research Laboratory, Japan. In 1997, his team developed XML Parser for Java, one of the first fully compliant XML processors. Since then, he has worked on XML and Web Services. In particular, he has focused on the security aspects of these technologies, such as XML Signature, XML Encryption, and "WS-Security standards." He wrote XML and Java: Developing Web Applications, published by Addison-Wesley. He is one of the coauthors of WS-Security standards. He has a master's degree from Tokyo Institute of Technology and a Ph. D. in computer science from Kyoto University. Contact Hiroshi at Anthony Nadalin is a Distinguished Engineer and the chief security architect who is responsible for security infrastructure design and development across IBM SWG and Tivoli. Anthony serves as the primary security liaison to Sun Microsystems' JavaSoft division for Java security design and development collaboration. In his 23-year career with IBM, he has held the following positions: lead security architect for VM/SP, security architect for AS/400, and security architect for OS/2. Anthony has also authored and coauthored more than 30 technical journal and conference articles and two books. Anthony has been on the technical committee of three major scientific journals and one conference, and has reviewed extensively work that peers in the field have published. E-mail Anthony at Chris Sharp is a senior technical staff member working on Web services specifications and standards in IBM's Software Group, based in the IBM Hursley Laboratory in the United Kingdom. Chris is also a member of the IBM Academy of Technology. He joined IBM in 1990 as a graduate of computer science and has worked in the field of integration and Internet standards since 1994. He worked extensively on the development of IBM's integration middleware and exploitation of Internet standards. Chris is the editor of the WS-PolicyAttachment specification, coauthor of the WS-Policy specification, and contributor to WS-Addressing, WS-MetadataExchange, and the WS-ResourceFramework specifications. Chris is a Fellow of the British Computer Society. You can reach him at / 149