Quota-Based merging operators for stratified knowledge bases

Authors:
Guilin Qi;Weiru Liu;David A. Bell
Affiliations:
School of Electronics, Electrical Engineering and Computer Science, Queen’s University Belfast, Belfast, UK;School of Electronics, Electrical Engineering and Computer Science, Queen’s University Belfast, Belfast, UK;School of Electronics, Electrical Engineering and Computer Science, Queen’s University Belfast, Belfast, UK
Venue:
KSEM'06 Proceedings of the First international conference on Knowledge Science, Engineering and Management
Year:
2006

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Abstract

Current merging methods for stratified knowledge bases are often based on the commensurability assumption, i.e. all knowledge bases share a common scale. However, this assumption is too strong in practice. In this paper, we propose a family of operators to merge stratified knowledge bases without commensurability assumption. Our merging operators generalize the quota operators, a family of important merging operators in classical logic. Both logical properties and computational complexity issues of the proposed operators are studied.