Document Type

Conference Proceeding

Publication Date



In this paper, we present an approach for measuring inconsistency in a knowledge base. We first define the degree of inconsistency using a four-valued semantics for the description logic ALC. Then an ordering over knowledge bases is given by considering their inconsistency degrees. Our measure of inconsistency can provide important information for inconsistency handling.


Presented at the 9th European Conference on Symbolic and Quantitative Approaches to Reasoning with Uncertainty, Hammamet, Tunisia, October 31-November 2, 2007.

Attached is the unpublished, peer-reviewed version of this proceeding. The final, publisher's version can be found at