InvitedPapers -- DecSerFlow: Towards a Truly Declarative Service Flow Language -- Service QoS Composition at the Level of Part Names -- SCC: A Service Centered Calculus -- Contributed Papers -- Computational Logic for Run-Time Verification of Web Services Choreographies: Exploiting the SOCS-SI Tool -- Semantic Querying of Mathematical Web Service Descriptions -- Verified Reference Implementations of WS-Security Protocols -- From BPEL Processes to YAWL Workflows -- Translating Orc Features into Petri Nets and the Join Calculus -- Dynamic Constraint-Based Invocation of Web Services -- A Formal Account of Contracts for Web Services -- Execution Semantics for Service Choreographies -- Analysis and Verification of Time Requirements Applied to the Web Services Composition -- A Formal Approach to Service Component Architecture -- Evaluating the Scalability of a Web Service-Based Distributed e-Learning and Course Management System -- Choreography Conformance Analysis: Asynchronous Communications and Information Alignment -- Application of Model Checking to AXML System’s Security: A Case Study -- Towards a Unifying Theory for Web Services Composition -- Towards the Formal Model and Verification of Web Service Choreography Description Language.