This volume presents the proceedings of an international
workshop on the processing of declarative knowledge. The
workshop was organized and hosted by the German Research
Center for Artificial Intelligence (DFKI) in cooperation
with the Association for Logic Programming (ALP) and the
Gesellschaft f}r Informatik (GI).
Knowledge is often represented using definite clauses,
rules, constraints, functions, conceptual graphs, and
related formalisms. The workshop addressed such high-level
representations and their efficient implementation required
for declarative knowledge bases. Many of the papers treat
representation methods, mainly concept languages, and many
treat implementation methods, such as transformation
techniques and WAM-like abstract machines. Several papers
describe implemented knowledge-processing systems. The
competition between procedural and declarative paradigms was
discussed in a panel session, and position statements of the
panelists are included in the volume.