This book constitutes the refereed proceedings of the 19th International Conference on Database and Expert Systems Applications, DEXA 2008, held in Turin, Italy, in September 2008. mobile data and information; data and information streams; data mining systems, data warehousing, OLAP; data and information semantics;

Invited Talk.- Session 1.- Session 2A: Semantic Web and Ontologies.- Session 2B: Query Processing.- Session 3: Web and Information Retrieval.- Session 4: Mobile Data and Information.- Session 5: Data and Information Streams.- Session 6: Data Mining Algorithms.- Session 7: Multimedia Databases.- Session 8: Data Mining Systems, Data Warehousing, OLAP.- Session 9: Temporal, Spatial, and High Dimensional Databases II.- Session 10: Data and Information Semantics.- Session 11: XML Databases I.- Session 12: XML Databases II.- Session 13: Query Processing and Optimization.- Session 14A: Data and Information Streams.- Session 14B: Potpourri.- Session 15A: Data Mining.- Session 15B: XML Databases.- Session 16A: Applications of Database, Information, and Decision Support Systems.- Session 16B: Optimization and Performance.- Session 17: Schema, Process and Knowledge Modelling and Evolution.

This book constitutes the refereed proceedings of the 19th International Conference on Database and Expert Systems Applications, DEXA 2008, held in Turin, Italy, in September 2008. The 74 revised full papers presented together with 1 invited paper were carefully reviewed and selected from 208 submissions. The papers are organized in topical sections on data privacy; temporal, spatial and high dimensional databases; semantic Web and ontologies; query processing; Web and information retrieval; mobile data and information; data and information streams; data mining algorithms; multimedia databases; data mining systems, data warehousing, OLAP; data and information semantics; XML databases; applications of database, information, and decision support systems; and schema, process and knowledge modelling and evolution.

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