Communications of the ACM
Signed data dependencies in logic programs
Journal of Logic Programming
Action semantics
Database updates in the event calculus
Journal of Logic Programming
The alternating fixpoint of logic programs with negation
PODS '89 Selected papers of the eighth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Logic and its applications
Distributed systems analysis with CCS
Distributed systems analysis with CCS
IEEE Transactions on Software Engineering
ML with Concurrency
Communication and Concurrency
HGV: A Library for Hierarchies, Graphs, and Views
GD '02 Revised Papers from the 10th International Symposium on Graph Drawing
RINGS: A Technique for Visualizing Large Hierarchies
GD '02 Revised Papers from the 10th International Symposium on Graph Drawing
Multilevel Visualization of Clustered Graphs
GD '96 Proceedings of the Symposium on Graph Drawing
An operational semantics for ZCCS
ICFEM '97 Proceedings of the 1st International Conference on Formal Engineering Methods
Visualization with Hierarchically Structured Trees for an Explanation Reasoning System
IV '04 Proceedings of the Information Visualisation, Eighth International Conference
Visualization for Management of Electronics Product Composition
IV '05 Proceedings of the Ninth International Conference on Information Visualisation
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As a programming technique, we formulate a calculus of illustrating event formation which is effectively performed. An event is visualized as a sequence of abstract charts denoting processes. The calculus contains a set of charts related to basic processes, a set of situations, a semantic function assigning a situation transition to each chart, a logic program with negation-as-failure, and the integrity constraint on the set of situations.