CoBase: a scalable and extensible cooperative information system
Journal of Intelligent Information Systems - Special issue on intelligent integration of information
Using explicit ontologies in KBS development
International Journal of Human-Computer Studies
Query approximate answering system for an incomplete DKBS
Fundamenta Informaticae - Special issue: intelligent information systems
Knowledge representation: logical, philosophical and computational foundations
Knowledge representation: logical, philosophical and computational foundations
Formal Ontology in Information Systems: Proceedings of the 1st International Conference June 6-8, 1998, Trento, Italy
Rough Sets: Theoretical Aspects of Reasoning about Data
Rough Sets: Theoretical Aspects of Reasoning about Data
Cooperative Answering through Controlled Query Relaxation
IEEE Expert: Intelligent Systems and Their Applications
Ontology, Metadata, and Semiotics
ICCS '00 Proceedings of the Linguistic on Conceptual Structures: Logical Linguistic, and Computational Issues
Ontologies: A Silver Bullet for Knowledge Management and Electronic Commerce
Ontologies: A Silver Bullet for Knowledge Management and Electronic Commerce
Ontology-based distributed autonomous knowledge systems
Information Systems - Special issue on web data integration
Incremental controlled relaxation of failing flexible queries
Journal of Intelligent Information Systems
Cooperative answering to flexible queries via a tolerance relation
ISMIS'08 Proceedings of the 17th international conference on Foundations of intelligent systems
OTM'05 Proceedings of the 2005 Confederated international conference on On the Move to Meaningful Internet Systems - Volume >Part I
Hi-index | 0.00 |
There are two basic cases when Query Answering System (QAS) for a Distributed Autonomous Information System (DAIS) may give no answer to a submitted query. Let us assume that q is that query which is submitted to an information system S representing one of the sites in DAIS. Systems in DAIS can be incomplete, have hierarchical attributes, and we also assume that there are no objects in S which descriptions are matching q. In such a case, QAS will fail and return the empty set of objects. Alternatively, it may relax query q as it was proposed in [7], [8], [2]. It means that q is replaced either automatically or with a help from user by a new more general query. Clearly, the ultimate goal is to find a generalization of q which is possibly the smallest. Smaller generalizations of queries always guarantee higher confidence in objects returned by QAS. Such QAS is called cooperative. We may also encounter failing query problem when some of the attributes listed in q are outside the domain of S. We call them foreign for S. In such a case, we extract definitions of foreign attributes for S at other sites in DAIS and next used them in QAS to solve q. However, to do that successfully, we have to assume that both systems agree on the ontology of their common attributes [14], [15], [16]. Such definitions are used to identify which objects in S may satisfy that query. The corresponding QAS is called collaborative. This paper shows that cooperation can be used as a refinement tool for the collaboration strategy dealing with failing query problem as presented in [14], [15].