We study the specification of access control policy in large-scale distributed systems. Our work on real-world policies has shown that standard policy idioms such as role hierarc...
We present a design of a distributed publish-subscribe system that extends the functionality of messaging middleware with “relational subscriptions”, to support timely updates...
Much work on XML data was around storage and querying and did not consider constraints of XML, especially keys. Since constraints have been proposed in many papers for XML, much r...
Default logic is used to describe regular behavior and normal properties. We suggest to exploit the framework of default logic for detecting outliers - individuals who behave in a...
We examine schema mappings from a type-theoretic perspective and aim to facilitate and formalize the reuse of mappings. Starting with the mapping language of Clio, we present a ty...