Welcome to the Workflow Handbook 2003. This landmark 10th anniversary edition from the Workflow Management Coalition (WfMC) offers you three sections: SECTION 1: The World of Workflow covers a wide spectrum of viewpoints and discussions by experts in their respective fields. Papers range from an uncomplicated definition of the technology, architecture styles, the importance of Web Services, adaptive workflow in a distributed environment, group applications, Business Activity Management to discussions on emerging technologies. SECTION 2: Workflow Standards deals with the importance of standards, and includes discussions and examples on the importance and deployment of standards, specifically the new XPDL specification recently published by the Coalition’s Technical Committee. The specification is published in full on the Coalition website. SECTION 3: Directory and Appendices provide an explanation of the structure of the Workflow Management Coalition, and include an authors’ appendix, WfMC officers and a membership directory.