This book constitutes the refereed proceedings of the Second International Workshop on Data Engineering Issues in E-Commerce and Services, DEECS 2006 held in San Francisco, California, June 2006.

E-Commerce Services.- An Approach to Detecting Shill-Biddable Allocations in Combinatorial Auctions.- Explanation Services and Request Refinement in User Friendly Semantic-Enabled B2C E-Marketplaces.- Customer Future Profitability Assessment: A Data-Driven Segmentation Function Approach.- Optimization of Automatic Navigation to Hidden Web Pages by Ranking-Based Browser Preloading.- Business Processes and Services.- Transforming Collaborative Business Process Models into Web Services Choreography Specifications.- Evaluation of IT Portfolio Options by Linking to Business Services.- Process Driven Data Access Component Generation.- Using Naming Tendencies to Syntactically Link Web Service Messages.- Data and Knowledge Engineering.- Maintaining Web Navigation Flows for Wrappers.- Mobile P2P Automatic Content Sharing by Ontology-Based and Contextualized Integrative Negotiation.- Integrating XML Sources into a Data Warehouse.- Remote-Specific XML Query Mobile Agents.- Business Models and Analysis.- A Process History Capture System for Analysis of Data Dependencies in Concurrent Process Execution.- Business Impact Analysis Using Time Correlations.- A Bottom-Up Workflow Mining Approach for Workflow Applications Analysis.- BestChoice: A Decision Support System for Supplier Selection in e-Marketplaces.- Web Services.- Semantic Web Services Enabled B2B Integration.- A Novel Genetic Algorithm for QoS-Aware Web Services Selection.- Analysis of Web Services Composition and Substitution Via CCS.- E-Commerce Systems.- Modified Naïve Bayes Classifier for E-Catalog Classification.- A Sentinel Based Exception Diagnosis in Market Based Multi-Agent Systems.- Dynamical E-Commerce System for Shopping Mall Site Through Mobile Devices.- PROMOD: A Modeling Tool for Product Ontology.