Advanced e-services require efficient, flexible, and easy-to-use workflow technology that integrates well with mainstream Internet technologies like XML. The WORK+™ architecture that leverages XML technology for Internet-wide workflow management within advanced e-services. The key concept is to "Marshall" all activity calls into special kinds of XML documents and to handle the flow between the workflow engine and the activities by some kind of XML mediator using http as the primitive transport protocol. Thus, workflow engines as well as activities and the corresponding business objects can reside on their native platforms without any special measures, and the XML mediator enables the cross-talk among all these components with all data exchanges in the form of XML documents. None of the involved parties, clients, business-object servers, or workflow servers, need to know any details about the other parties. Clients need no software other than an Internet browser, yet handle interactions with workflows and business objects much more efficiently than with a full-blown Java implementation. By using XML data transfers WORK+™ enhances your business process whether they are initiated from Web portal or from your knowledge worker. XML also speeds up the WORK+™ server response hence improving the lag time of the application.