Invited Speakers -- Social Networks and the Web -- CiteSeer: Past, Present, and Future -- Collaborative Filtering and Recommendation -- A Fuzzy Linguistic Multi-agent Model for Information Gathering on the Web Based on Collaborative Filtering Techniques -- Case-Based Reasoning as a Prediction Strategy for Hybrid Recommender Systems -- Supporting Web Communities -- Facing Environment Discontinuity through User Location -- Adaptive Resource Management in the PIÑAS Web Cooperative Environment -- Multi-agent Systems -- A Fuzzy Multi-agent System for Secure Remote Control of a Mobile Guard Robot -- Implementation of an Ontology Sharing Mechanism for Multiagent Systems Based on Web Services -- An Agent Based System for the Contextual Retrieval of Medical Information -- Soft Computing Methods I -- Attribute Reduction for Effective Intrusion Detection -- Computing Minimal Probabilistic Rules from Probabilistic Decision Tables: Decision Matrix Approach -- A Framework for Extending Fuzzy Description Logic to Ontology Based Document Processing -- Text Processing and Semantic Web -- On Correction of Semantic Errors in Natural Language Texts with a Dictionary of Literal Paronyms -- Web-Based Sources for an Annotated Corpus Building and Composite Proper Name Identification -- Intelligent Automated Navigation through the Deep Web -- Web Information Retrieval -- Extending the Rocchio Relevance Feedback Algorithm to Provide Contextual Retrieval -- Toward a Document Model for Question Answering Systems -- Designing Ontological Agents: an Alternative to Improve Information Retrieval in Federated Digital Libraries -- Categorization and Ranking -- Query Clustering for Boosting Web Page Ranking -- Fast Transforms in the Internet Document Retrieval -- Analysis of a Web Content Categorization System Based on Multi-agents -- Soft Computing Methods II -- ImmoSoftWeb: a Web Based Fuzzy Application for Real Estate Management -- Adaptive Watermarking Algorithm for Binary Image Watermarks -- Bayesian Methods to Estimate Future Load in Web Farms.