HYPROLOG: A New Logic Programming Language with Assumptions and Abduction

We present HYPROLOG, a novel integration of Prolog with assumptions and abduction which is implemented in and partly borrows syntax from Constraint Handling Rules (CHR) for integrity constraints. Assumptions are a mechanism inspired by linear logic and taken over from Assumption Grammars. The language shows a novel flexibility in the interaction between the different paradigms, including all additional built-in predicates and constraints solvers that may be available. Assumptions and abduction are especially useful for language processing, and we can show how HYPROLOG works seamlessly together with the grammar notation provided by the underlying Prolog system. An operational semantics is given which complies with standard declarative semantics for the “pure” sublanguages, while for the full HYPROLOG language, it must be taken as definition. The implementation is straightforward and seems to provide for abduction, the most efficient of known implementations; the price, however, i...

• Type: Conference
• Year: 2005
• Where: ICLP
• Authors: Henning Christiansen, Verónica Dahl
• Keywords: Additional Built-in Predicates, Constraint Handling Rules, ICLP 2005, Programming Languages, Prolog