Using Argumentation to Structure E-Participation in Policy Making.- Horizontal Business Process Model Integration.- Exact and Approximate Generic Multi-criteria Top-k Query Processing.- Continuous Predictive Line Queries for On-the-Go Traffic Estimation.- Query Operators for Comparing Uncertain Graphs.- Fast Disjoint and Overlapping Community Detection.- A Hybrid Approach Using Genetic Programming and Greedy Search for QoS-Aware Web Service Composition.