Invited Talks -- Information and Influence in Social Networks -- Learning, Logic, and Probability: A Unified View -- Knowledge Acquisition -- KARaCAs: Knowledge Acquisition with Repertory Grids and Formal Concept Analysis for Dialog System Construction -- Capturing Quantified Constraints in FOL, Through Interaction with a Relationship Graph -- Assisting Domain Experts to Formulate and Solve Constraint Satisfaction Problems -- Knowledge Acquisition Evaluation Using Simulated Experts -- Stochastic Foundations for the Case-Driven Acquisition of Classification Rules -- From Natural Language to Formal Proof Goal -- Reuse: Revisiting Sisyphus-VT -- Ontology Engineering -- Role Organization Model in Hozo -- Verification and Refactoring of Ontologies with Rules -- Ontology Selection for the Real Semantic Web: How to Cover the Queen’s Birthday Dinner? -- Ontology Engineering, Scientific Method and the Research Agenda -- Ontology Learning -- Ontology Enrichment Through Automatic Semantic Annotation of On-Line Glossaries -- Discovering Semantic Sibling Groups from Web Documents with XTREEM-SG -- Designing and Evaluating Patterns for Ontology Enrichment from Texts -- Ontology Mapping and Evolution -- Semantic Metrics -- Matching Unstructured Vocabularies Using a Background Ontology -- Distributed Multi-contextual Ontology Evolution – A Step Towards Semantic Autonomy -- An Evaluation Method for Ontology Complexity Analysis in Ontology Evolution -- Semantic Search -- Semantic Search Components: A Blueprint for Effective Query Language Interfaces -- SemSearch: A Search Engine for the Semantic Web -- Rich Personal Semantic Web Clients: Scenario and a Prototype -- User Interfaces -- i dee: An Integrated and Interactive Data Exploration Environment Used for Ontology Design -- Evaluating a Thesaurus Browser for an Audio-visual Archive -- Knowledge Discovery -- Frequent Pattern Discovery from OWL DLP Knowledge Bases -- Engineering and Learning of Adaptation Knowledge in Case-Based Reasoning -- A Methodological View on Knowledge-Intensive Subgroup Discovery -- Iterative Bayesian Network Implementation by Using Annotated Association Rules -- Semantics from Networks and Crowds -- Multilayered Semantic Social Network Modeling by Ontology-Based User Profiles Clustering: Application to Collaborative Filtering -- Towards Knowledge Management Based on Harnessing Collective Intelligence on the Web -- A Formal Approach to Qualitative Reasoning on Topological Properties of Networks -- Applications -- Towards a Knowledge Ecosystem -- A Tool for Management and Reuse of Software Design Knowledge -- The ODESeW Platform as a Tool for Managing EU Projects: The Knowledge Web Case Study.

This book constitutes the refereed proceedings of the 15th International Conference on Knowledge Engineering and Knowledge Management, EKAW 2006, held in Podebrady, Czech Republic in October 2006. The 17 revised full papers and 16 revised short papers presented together with 2 invited talks were carefully reviewed and selected from 119 submissions. The papers are organized in topical sections on knowledge acquisition, ontology engineering, ontology learning, ontology mapping and evolution, semantic search, user interfaces, knowledge discovery, semantics from networks and crowds, and applications.