Invited Talk -- Voting: A View through the Algorithmic Lens -- Infomobility and Negotiation -- Personalized Popular Blog Recommender Service for Mobile Applications -- Bargaining Agents in Wireless Contexts: An Alternating-Offers Protocol for Multi-issue Bilateral Negotiation in Mobile Marketplaces -- A Group Recommender System for Tourist Activities -- Personalized Location-Based Recommendation Services for Tour Planning in Mobile Tourism Applications -- E-payments and Trust -- Do You Trust Your Phone? -- A Multi-scheme and Multi-channel Framework for Micropayment Systems -- Secure Transaction Protocol for CEPS Compliant EPS in Limited Connectivity Environment -- Trust Enhanced Authorization for Mobile Agents -- Domain Knowledge and Metadata Exploitation -- Towards Semantic Modelling of Business Processes for Networked Enterprises -- Metadata-Driven SOA-Based Application for Facilitation of Real-Time Data Warehousing -- Exploiting Domain Knowledge by Automated Taxonomy Generation in Recommender Systems -- Automatic Generation of Mashups for Personalized Commerce in Digital TV by Semantic Reasoning -- Invited Talk -- Product Variety, Consumer Preferences, and Web Technology: Can the Web of Data Reduce Price Competition and Increase Customer Satisfaction? -- Design and Modelling of Enterprise and Distributed Systems -- Perspectives for Web Service Intermediaries: How Influence on Quality Makes the Difference -- Aligning Risk Management and Compliance Considerations with Business Process Development -- Electronic Commerce and Web 3.0 -- Using Knowledge Base for Event-Driven Scheduling of Web Monitoring Systems -- RCQ-GA: RDF Chain Query Optimization Using Genetic Algorithms -- Integrating Markets to Bridge Supply and Demand for Knowledge Intensive Tasks -- Real-Time Robust Adaptive Modeling and Scheduling for an Electronic Commerce Server -- Collaboration-Based Approaches -- Content-Based Personalization Services Integrating Folksonomies -- Computational Complexity Reduction for Factorization-Based Collaborative Filtering Algorithms -- Sequence-Based Trust for Document Recommendation -- Recommender Systems Modelling -- Recommender Systems on the Web: A Model-Driven Approach -- Designing a Metamodel-Based Recommender System -- Towards Privacy Compliant and Anytime Recommender Systems -- Reputation and Fraud Detection -- Assessing Robustness of Reputation Systems Regarding Interdependent Manipulations -- Fraud Detection by Human Agents: A Pilot Study -- Recommender Systems and the Social Web -- Finding My Needle in the Haystack: Effective Personalized Re-ranking of Search Results in Prospector -- RATC: A Robust Automated Tag Clustering Technique -- Recommender Systems in Action -- ISeller: A Flexible Personalization Infrastructure for e-Commerce Applications -- Comparing Pre-filtering and Post-filtering Approach in a Collaborative Contextual Recommender System: An Application to E-Commerce -- Providing Relevant Background Information in Smart Environments.

This book constitutes the refereed proceedings of the 10th International Conference on Electronic Commerce and Web Technologies, EC-Web 2009, held in Linz, Austria, in September, 2009 in conjunction with Dexa 2009. The 31 revised full papers presented together with 2 invited papers were carefully reviewed and selected from 61submissions. The papers are organized in nine topical sessions on e-payments and trust, domain knowledge and metadata exploitation, design and modelling of enterprise and distributed systems, electronic commerce and web 3.0, collaboration-based approaches, recommender systems modelling, reputation and fraud detection, recommender systems and the social web, and recommender systems in action.