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EWDW
1990
15 years 1 months ago
Semantics of Object-Oriented Data Models - The Evolving Algebra Approach
The formal description of the semantics of object-oriented data models is still an open problem. Some characteristic features of object-oriented data models, such as methods and i...
Georg Gottlob, Gerti Kappel, Michael Schrefl
ESOP
2012
Springer
13 years 5 months ago
The Call-by-Need Lambda Calculus, Revisited
The existing call-by-need λ calculi describe lazy evaluation via equational logics. A programmer can use these logics to safely ascertain whether one term is behaviorally equivale...
Stephen Chang, Matthias Felleisen
INTERACTION
2009
ACM
15 years 4 months ago
DTD2OWL: automatic transforming XML documents into OWL ontology
DTD and its instance have been considered the standard for data representation and information exchange format on the current web. However, when coming to the next generation of w...
Pham Thi Thu Thuy, Young-Koo Lee, Sungyoung Lee
LPNMR
2009
Springer
15 years 4 months ago
Complexity of the Stable Model Semantics for Queries on Incomplete Databases
Abstract. We study the complexity of consistency checking and query answering on incomplete databases for languages ranging from non-recursive Datalog to disjunctive Datalog with n...
Jos de Bruijn, Stijn Heymans
DALT
2009
Springer
15 years 1 months ago
Ontology and Time Evolution of Obligations and Prohibitions Using Semantic Web Technology
The specification and monitoring of conditional obligations and prohibitions with starting points and deadlines is a crucial aspect in the design of open interaction systems. In th...
Nicoletta Fornara, Marco Colombetti