Invited Talks -- Case-Based Reasoning in the Health Sciences: Why It Matters for the Health Sciences and for CBR -- An Analysis of Research Themes in the CBR Conference Literature -- Semantics and Experience in the Future Web -- Research Papers -- Recognizing the Enemy: Combining Reinforcement Learning with Strategy Selection Using Case-Based Reasoning -- Formal and Experimental Foundations of a New Rank Quality Measure -- Provenance, Trust, and Sharing in Peer-to-Peer Case-Based Web Search -- Visualizing and Evaluating Complexity of Textual Case Bases -- Learning Similarity Functions from Qualitative Feedback -- Conservative Adaptation in Metric Spaces -- Opportunistic Acquisition of Adaptation Knowledge and Cases - The IakA Approach -- Noticeably New: Case Reuse in Originality-Driven Tasks -- Experience-Based Design of Behaviors in Videogames -- Considerations for Real-Time Spatially-Aware Case-Based Reasoning: A Case Study in Robotic Soccer Imitation -- Retrieval Based on Self-explicative Memories -- Increasing Precision of Credible Case-Based Inference -- Supporting Case-Based Retrieval by Similarity Skylines: Basic Concepts and Extensions -- Using Case Provenance to Propagate Feedback to Cases and Adaptations -- Towards Case-Based Support for e-Science Workflow Generation by Mining Provenance -- Knowledge Planning and Learned Personalization for Web-Based Case Adaptation -- Cases, Predictions, and Accuracy Learning and Its Application to Effort Estimation -- Evaluation of Feature Subset Selection, Feature Weighting, and Prototype Selection for Biomedical Applications -- Case-Based Decision Support for Patients with Type 1 Diabetes on Insulin Pump Therapy -- Conversational Case-Based Reasoning in Self-healing and Recovery -- Situation Assessment for Plan Retrieval in Real-Time StrategyGames -- Optimization Algorithms to Find Most Similar Deductive Consequences (MSDC) -- Understanding Dubious Future Problems -- Conversational Case-Based Recommendations Exploiting a Structured Case Model -- k-NN Aggregation with a Stacked Email Representation -- Case-Based Reasoning and the Statistical Challenges -- Evaluation Measures for TCBR Systems -- CBR for CBR: A Case-Based Template Recommender System for Building Case-Based Systems -- Forgetting Reinforced Cases -- iReMedI - Intelligent Retrieval from Medical Information -- Adaptation through Planning in Knowledge Intensive CBR -- Folk Arguments, Numerical Taxonomy and Case-Based Reasoning -- Real-Time Plan Adaptation for Case-Based Planning in Real-Time Strategy Games -- Horizontal Case Representation -- Application Papers -- Supporting Fraud Analysis in Mobile Telecommunications Using Case-Based Reasoning -- Predicting the Presence of Oil Slicks After an Oil Spill -- Case Based Interpretation of Soil Chromatograms -- Case-Based Troubleshooting in the Automotive Context: The SMMART Project -- Rapid Prototyping of CBR Applications with the Open Source Tool myCBR.

This book constitutes the refereed proceedings of the 9th European Conference on Case-Based Reasoning, ECCBR 2008, held in Trier, Germany, in September 2008. The 34 revised research papers and 5 revised application papers presented together with 3 invited talks were carefully reviewed and selected from 71 submissions. All current issues in case-based reasoning are addressed, ranging from theoretical and methodological issues to advanced applications in various fields such as knowledge discovery, similarity, context-awareness, uncertainty, and health sciences.