We present a formal, tool-supported approach to the design and maintenance of access control policies expressed in the eXtensible Access Control Markup Language (XACML). Our aim is...
Over the past 15 years there has been increasing recognition that careful attention to the design of a system’s software architecture is critical to satisfying its requirements ...
This paper describes a new method for visualizing complex information spaces as painted images. Scientific visualization converts data into pictures that allow viewers to "se...
This paper provides a formal foundation for distributed workfiow executions. The state chart formalism is adapted to the needs of a workflow model in order to establish a basis for...
As the amount of available ontologies and their size grow, ontology reuse gains in importance. However, the online available formalized knowledge in many cases need a revision whic...