We introduce the Xdπ calculus, a peer-to-peer model for reasoning about dynamic web data. Web data is not just stored statically. Rather it is referenced indirectly, for example ...
We investigate the typechecking problem for XML queries: statically verifying that every answer to a query conforms to a given output schema, for inputs satisfying a given input sc...
We introduce Xeek, a method for managing XML documents using relational databases. Most previous proposals in which the XPath axes are evaluated using only the pre- and postorder n...
We argue that a roadmap for software engineering and the Internet currently should be based on standards for complex data and document structures, like the Extensible Markup Langu...
As the ontologies are the pivotal element of the Semantic Web in E-Commerce, it is necessary to protect the ontology’s integrity and availability. In addition, both suppliers and...
Andreas Ekelhart, Stefan Fenz, A. Min Tjoa, Edgar ...