this book presents the thoroughly refereed post-workshop proceedings of the third international workshop on logic programming and knowledge representation, lpkr97, held in port jefferson, ny, usa, in october 1997.the eight revised full papers presented have undergone a two-round reviewing process; also included is a comprehensive introduction surveying the state of the art in the area. the volume is divided into topical sections on disjunctive semantics, abduction, priorities, and updates.