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KCAP
2003
ACM
13 years 9 months ago
Modularisation of domain ontologies implemented in description logics and related formalisms including OWL
Modularity is a key requirement for large ontologies in order to achieve re-use, maintainability, and evolution. Mechanisms for ‘normalisation’ to achieve analogous aims are s...
Alan L. Rector
CI
1999
90views more  CI 1999»
13 years 4 months ago
Efficient Implementation of Semantic Relations in Lexical Databases
In this paper we develop a formalization of semantic relations that facilitates efficient implementations of relations in lexical databases or knowledge representation systems usi...
Uta Priss
ICDE
1994
IEEE
103views Database» more  ICDE 1994»
13 years 8 months ago
A Multi-Set Extended Relational Algebra - A Formal Approach to a Practical Issue
The relational data model is based on sets of tuples, i.e. it does not allow duplicate tuples in a relation. Many database languages and systems do require multi-set place, the hi...
Paul W. P. J. Grefen, Rolf A. de By
VLDB
2001
ACM
104views Database» more  VLDB 2001»
14 years 4 months ago
Global transaction support for workflow management systems: from formal specification to practical implementation
In this paper, we present an approach to global transactionmanagementinworkflowenvironments.Thetransaction mechanism is based on the well-known notion of compensation, but extended...
Paul W. P. J. Grefen, Jochem Vonk, Peter M. G. Ape...