Antonio L. Furtado

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Schema matching is a fundamental issue in many database applications, such as query mediation and data warehousing. It becomes a challenge when different vocabularies are used to refer to the same real-world concepts. In this context, a convenient approach, sometimes called extensional, instancebased or semantic, is to detect how the same real world objects(More)
CHRIS is an expert software tool to help in the design and rapid prototyping of information systems containing a database component. CHRIS involves an extended entity-relationship information model, the relational data model and a database management system. A prototype version of the tool, written in Prolog extended with a query-the-user facility, is fully(More)
Brazilian Computer Society (SBC) promoted the workshop, with support from CAPES and FAPESP. It was attended by 26 Brazilian computer scientists, co-authors of this report, and four invited researchers. The computer scientists were selected by the workshop´s steering committee, based on an analysis of 47 short position papers on grand challenges, submitted(More)
A key issue in interactive storytelling is how to generate stories which are, at the same time, interesting and coherent. On the one hand, it is desirable to provide means for the user to intervene in the story. On the other hand, it is necessary to guarantee that user intervention will not introduce events that violate the rules of the intended genre. This(More)
An algebra which operates on partitioned relations is developed. Relation partitioning is achieved by defining equivalence relations on n-ary relations. It is shown that the algebra is as powerful as the original relational algebra, having the advantage of a set-processing capability. This feature provides both greater flexibility in query specification and(More)
Metaphor is not merely a rhetorical device, characteristic of language alone, but rather a fundamental feature of the human conceptual system. A metaphor is understood by finding an analogy mapping between two domains. This paper argues that analogy mappings facilitate conceptual modeling by allowing the designer to reinterpret fragments of familiar(More)
A key issue in interactive storytelling is how to generate stories which are, at the same time, interesting and coherent. On the one hand, it is desirable to provide means for the user to intervene in the story. But, on the other hand, it is necessary to guarantee that user intervention will not introduce events that violate the rules of the intended genre.(More)