Abstract
We introduce a generalized definition of SLD-resolution admitting restrictions on atom and/or clause selectability. Instances of these restrictions include delay declarations, input-consuming unification and guarded clauses. In the context of such a generalization of SLD-resolution, we offer a theoretical framework to reason about programs and queries such that all derivations are successful. We provide a characterization of those programs and queries which allows to reuse existing methods from the literature on termination and verification of Prolog programs.
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