Thomas Eiter, Giovambattista Ianni, Roman Schindlauer, Hans Tompits, Kewen Wang:
Forgetting in Managing Rules and Ontologies.
Abstract
The language of HEX-programs under the answer-set semantics is
    designed for interoperating with heterogeneous sources via external atoms
    and for meta-reasoning via higher-order literals in the context of the
    semantic Web. As an important technique in managing knowledge bases, the
    notion of forgetting has received increasing interest in the
    knowledge-representation area. In this paper, we introduce a
    semantics-based theory of forgetting for HEX-programs and, in turn, for a
    class of OWL/RDF(S) ontologies which allows to fully employ semantic
    information in managing ontologies like editing, merging, aligning, and
    redundancy removal
      
URL:
http://rewerse.net/publications/rewerse-publications.html#REWERSE-RP-2006-128
@inproceedings{REWERSE-RP-2006-128,
	author = {Thomas Eiter and Giovambattista Ianni and Roman Schindlauer and Hans Tompits and Kewen Wang},
	title = {Forgetting in Managing Rules and Ontologies},
	booktitle = {Proceedings of The 2006 IEEE/WIC/ACM International Conference on Web Intelligence, Hong Kong (18th--22nd December 2006)},
	year = {2006},
	pages = {411--419},
	url = {http://rewerse.net/publications/rewerse-publications.html#REWERSE-RP-2006-128}
}