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In the present paper unranked tableaux calculus is discussed, which extends the classical first order tableaux calculus for formulas over unranked terms. The correctness and completeness theorems of the calculus are proved and its expressive power in Web-related applications are illustrated.
We illustrate the potential of conditional hedge transformations in Web-related applications on the example of PρLog: an extension of logic programming with advanced rule-based programming features for hedge transformations, strategies, and regular constraints.
In this paper we introduce λR: A foundational calculus for sequence processing with regular expression types. Its term language is the lambda calculus extended with sequences of terms and its types are regular expressions over simple types. We provide a flexible notion of subtyping based on the semantic notion of nominal interpretation of a type. Then we prove that types are preserved by...
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