In this paper, we aim at showing the advantages of Conceptual Graph formalism for the Semantic Web through several real-world applications in the framework of Corporate Semantic We...
Refinement semantics is an alternative to least fixpoint semantics that is more useful for programming. From it we derive a variety of rules for w h i l e-loops, for-loops, and loo...
Currently a number of these on-line support systems for electronic contracting are under development. In this paper we develop a logical formalism to represent the content of busi...
Soundness proofs of program logics such as Hoare logics and type systems are often made easier by decorating the operational semantics with information that is useful in the proof...
The problems of query containment, equivalence, and minimization are recognized as very important in the context of query processing, specifically of query optimization. In their...