FaCT and iFaCT
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\begin{bibtex} @inproceedings{DBLP:conf/dlog/Horrocks99, title={FaCT and iFaCT}, year={1999}, crossref={DBLP:conf/dlog/1999}, booktitle={Description Logics}, ee={http://SunSITE.Informatik.RWTH-Aachen.DE/Publications/CEUR-WS/Vol-22/horrocks.ps}, url={http://www.informatik.uni-trier.de/~ley/db/conf/dlog/dlog1999.html#Horrocks99}, author={Ian Horrocks} }\end{bibtex}
