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Inhaltsangabe: Abstract: Nowadays, database management systems (DBMS) play a central role in the realization of modern information systems for efficient storage, management and retrieval of large amount of data. At the same time, the eXtensible Markup Language (XML) is emerging fast as de facto standard for electronic data exchange. In order to be able to benefit from both technologies, a number of approaches have already been developed, aiming at the integration of XML and DBMS. They allow processing XML data on the basis of declarative query languages, don’t pay however much attention to the manipulation of XML data. The objective of this diploma thesis is to implement X-Ray QL, a declarative query and data manipulation language for X-Ray, an integration approach using the idea of a meta database. X-Ray QL allows besides creating, editing and deleting XML data in a declarative way, to retrieve the XML data using simple select queries. The implementation of X-Ray QL consequently provides an operative runtime part of the X-Ray architecture with features like session management, authorisation mechanism and transaction control. An additional Web Service demonstrates the practical use of the X-Ray QL implementation. Zusammenfassung: Datenbankmanagementsysteme (DBMS) spielen heutzutage eine zentrale Rolle bei der Realisierung moderner Informationssysteme zur effizienten Speicherung, Verwaltung und Verarbeitung grosser Datenmengen. Gleichzeitig steht mit der eXtensible Markup Language (XML) eine erweiterbare Auszeichnungssprache zur Verfugung, die unter anderem als Quasi-Standard fur den elektronischen Datenaustausch gilt. Um die Vorteile beider Technologien nutzen zu koennen, existiert bereits eine Reihe von Ansatzen, die eine Integration von XML und DBMS zum Ziel haben. Diese Ansatze erlauben es XML Datenbestande auf Basis deklarativer Abfragesprachen zu verarbeiten, jedoch wurde das Verandern von bestehenden Datenbestanden noch nicht genauer behandelt ([KIM02]).
