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Concrete Logic Programming System: IRIS

  • Java based Datalog reasoner
    • Developed at STI Innsbruck
    • Freely available open source project
    • Homepage:

  • Extensions:
    • Stratified / Well-founded default negation
    • XML Schema data types
    • Various built-in predicates (Equality, inequality, assignment, unification, comparison, type checking, arithmetic, regular expressions,... )

  • Highly modular and includes different reasoning strategies
    • Bottom-up evaluation with Magic Sets optimizations (forward-chaining)
    • Top-down evaluation by SLDNF resolution (backward-chaining)

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