@conference {21,
	title = {SROIQ Syntax Approximation by Using Nominal Schemas},
	booktitle = {Informal Proceedings of the 26th International Workshop on Description Logics, Ulm, Germany, July 23 - 26, 2013},
	year = {2013},
	pages = {988{\textendash}999},
	url = {http://ceur-ws.org/Vol-1014/paper_31.pdf},
	author = {Cong Wang and David Carral and Pascal Hitzler}
}
