@book{baader03description, title = {The Description Logic Handbook}, author = {Franz Baader and Deborah L. McGuinness and Daniele Nardi and Peter F. Patel-Schneider}, year = {2003}, biburl = {http://www.bibsonomy.org/bibtex/2ae2c598afa06b3c6a814db90990a9935/schmitz}, keywords = {descriptionlogics dl } }