TY - RPRT T1 - Cardinality restrictions on concepts T3 - Kaiserslautern ; Saarbrücken : DFKI, 1993 A1 - Baader,Franz A1 - Buchheit,Martin A1 - Hollunder,Bernhard Y1 - 2011/06/28 N2 - The concept description formalisms of existing terminological systems allow the user to express local cardinality restrictions on the fillers of a particular role. It is not possible, however, to introduce global restrictions on the number of instances of a given concept. The paper argues that such cardinality restrictions on concepts are of importance in applications such as configuration of technical systems, an application domain of terminological systems that is currently gaining in interest. It shows that including such restrictions into the description language leaves the important inference problems such as instance testing decidable. The algorithm combines and simplifies the ideas developed for the treatment of qualifying number restrictions and of general terminological axioms. KW - Künstliche Intelligenz CY - Saarbrücken PB - Universitäts- und Landesbibliothek AD - Postfach 151141, 66041 Saarbrücken UR - http://scidok.sulb.uni-saarland.de/volltexte/2011/3709 ER -