Model-theoretic methods are used to extend Craig's Interpolation Theorem to the loop-free portion of Pratt's dynamic logic of programs with simple assignments.

These two volumes collect papers presented at the first joint meeting of the two principal logic programming conferences, held in August of 1988. The more than fifty contributions cover all aspects of the field, including applications (particularly those that exploit the unique character of logic programming), the role of logic programming in artificial intelligence, deductive databases, relations to other computational paradigms, language issues, methodology, implementations on sequential and parallel architectures, and theory.Logic Programming is included in the Logic Programming series Research (...) Reports and Notes, edited by Ehud Shapiro. (shrink)