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D We describe a novel logic, called HiLog, and show that it provides a more suitable basis for logic programming than does traditional predicate logic. HiLog has a higher-order syntax and allows arbitrary terms to appear in places where predicates, functions, and atomic formulas occur in predicate calculus. But its semantics is first-order and admits a(More)
This paper describes the XSB system, and its use as an in-memory deductive database engine. XSB began from a Prolog foundation, and traditional Prolog systems are known to have serious deficiencies when used as database systems. Accordingly, XSB has a fundamental bottom-up extension, introduced through tabling (or memoing)[4], which makes it appropriate as(More)
The authors use the results of empirical studies to advance a novel theory of language learning that emphasizes the role of multiple cues and forces in development. The Generative Lexicon presents a novel and exciting theory of lexical semantics that addresses the problem of the "multiplicity of word meaning.". The first formally elaborated theory of a(More)
> The well-founded model provides a natural and robust semantics for logic programs with negative literals in rule bodies. Although various procedural semantics have been proposed for query evaluation under the well-founded semantics, the practical issues of implementation for eeective and eecient computation of queries have been rarely discussed. This(More)
T he power of logic programming (LP) comes from the synergism between the logic (declarativeness) and the programming (proce-durality [13, 37]. From the logic point of view, a program is a set of sentences in a given logic. In this declarative view, answers are logical consequences of the program as a set of statements in the logic. And logical consequence(More)