Processing rank aware queries in schema based P2P systems [Elektronische Ressource] / von Katja Hose

Processing Rank-Aware Queries inSchema-Based P2P SystemsDissertationZur Erlangung des akademischen GradesDoktor-Ingenieur (Dr.-Ing.)vorgelegt der¨ ¨Fakultat fur Informatik und Automatisierung¨der Technischen Universitat IlmenauvonDipl.-Inf. Katja HoseTag der Einreichung: 27. Oktober 2008Tag der wissenschaftlichen Aussprache: 17. April 2009Gutachter1. Kai-Uwe Sattler2. Alon Halevy3. Felix Naumannurn:nbn:de:gbv:ilm1-2009000084Processing Rank-Aware Queries inSchema-Based P2P SystemsKatja HoseA dissertation submittedin partial fulfillment of the requirementsfor the degree ofDoktor-Ingenieur (Dr.-Ing.)Faculty of Computer Science and Automation¨Technische Universitat IlmenauOctober 2008Reading Committee1. Kai-Uwe Sattler2. Alon Halevy3. Felix NaumannAbstractIn recent years, there has been considerable research with respect to query processingin data integration and P2P systems. Conventional data integration systems consistof multiple sources with possibly different schemas, adhere to a hierarchical structure,and have a central component (mediator) that manages a global schema. Queries areformulated against this global schema and the mediator processes them by retrievingrelevant data from the sources transparently to the user. Arising from these systems,eventually Peer Data Management Systems (PDMSs), or schema-based P2P systemsrespectively, have attracted attention.