Fensel, Dieter and van Harmelen, Frank "A Comparison of Languages which Operationalise and Formalise KADS Models of Expertise" The Knowledge Engineering Review, 9(2), 1994.

Languages mentioned

• (ML)2 {1992}
• BABYLON {1989} Expert system with frame language
• FORKADS {1991}
• KARL {1993}
• KBSSF {1992}
• MODEL-K {1993}
• MoMo {1992}
• OMOS {1992}
• QIL {1992}