The integration of data-oriented (structural), behavioral and deductive aspects is necessary in next generation information systems. Therefore the deductive object-oriented database paradigm offers a very promising starting point for the implementation of these kinds of information systems. So far in the context of this paradigm a big problem has been the lack of a query language suitable to an...

This study involving 60 Japanese learners of English investigated the effects of various kinds of form-focused instruction on learners’ ability to comprehend and produce polite requests in English. Each treatment group received one of the following: (a) deductive instruction; (b) inductive instruction with problem-solving tasks; or (c) inductive instruction with structured input tasks. These ta...

Evidence of children’s sensitivity to statistical features of their input in language acquisition is often used to argue against learning mechanisms driven by innate knowledge. At the same time, evidence of children acquiring knowledge that is richer than the input supports arguments in favor of such mechanisms. This tension can be resolved by separating the inferential and deductive components...

The notion of deductive database is generalized by extending the rst-order language, used to formulate facts, rules and constraints, to a rst-order language involving time operators. A deductive database based on such an extended language is called temporal. In this paper, we rst introduce two additional time operators, one to reference past tenses, the other to reference future tenses. Then, t...

We review in this paper both a framework for integrating the treatment of advanced update problems in deductive databases and the architecture of the FOLRE deductive database management system prototype, which extends the basic updating facilities provided by current deductive database systems. The distinguishing feature of our approach is the underlying integrative framework used to specify an...