This book constitutes the refereed proceedings of the European Workshop on Logics in Artificial Intelligence, JELTA '98, held in Dagstuhl, Germany, in October 1998.The 25 revised full papers presented were carefully selected from a total of 65 submissions. Also included are two abstracts of invited talks. The papers are organized in topical sections on logic programming, epistemic logics, theorem proving, non-monotonic reasoning, non-standard logics, knowledge representation, and higher order logics.