Vergleich von Ansätzen wertbasierter Integritätsbedingungen in XML

During the last few years, XML became one of the most important formats for data exchange over the Internet. In order to process transmitted data it is essential to know their structure and semantics. For specifying the structure of XML data, the schema languages XML Schema Definition and Document Type Definition, both developed by the World Wide Web Consortium, have become standards. In contrast, none of the approaches for specifying the semantics of XML data by means of integrity constraints have become prevalent so far. The XML integrity constraints presented in literature differ in many respects, but do also have certain commonalities. The purpose of this diploma thesis is to find out these commonalities and to establish criteria for comparing different approaches for value-based XML integrity constrains. Based on these criteria, some of the most prominent approaches are analyzed and finally contrasted.