Olejar Books

This book constitutes the refereed proceedings of the 4th International Workshop on Principles and Practice of Semantic Web Reasoning, PPSWR 2006, held in Budva, Montenegro in June 2006 as a satellite event of the 3rd Annual European Semantic Web Conference, ESWC 2006. The 14 revised full papers presented together with 1 invited talk and 6 system demonstrations were carefully reviewed and selected from 25 submissions. The major aspects of semantic Web research are addressed in the papers, namely various forms of reasoning with a strong interest in rule-based languages and methods - ranging from more theoretical work on reasoning methods that can be applied to the semantic Web, concrete reasoning methods and query languages for the semantic Web, to practical applications.