Índice / Contents

S2I+: Armazenamento Eficiente em Índice Espaco-Textual

With the popularization of Smartphones with GPS, there is a huge amount of data with spatial and textual information being produced and shared. Hybrid indexes that combine spatial and textual information are being proposed to process queries efficiently. One of the most efficient indexes is S2I (Spatial Inverted Index). However, S2I has a major drawback in terms of index size. In this paper, we...

Un enfoque gramatical para la extracción de términos índice

The extraction of the keywords that characterize a document in a given collection is one of the most important components of an Information Retrieval system. In this article, we propose to apply shallow parsing, implemented by means of cascades of finite-state transducers, to extract complex index terms based on an approximated grammar of Spanish. The coverage of the grammar is small but it all...

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i-FoX: Um Índice Eficiente e Compacto para Dados XML

Resumo Para acelerar consultas em qualquer Banco de Dados, estruturas de ı́ndice são criadas e construı́das a partir de campos que identificam unicamente um item na Base de Dados. O objetivo deste artigo é apresentar o i-FoX, um ı́ndice eficiente e compacto para dados XML, construı́do dentro do contexto do FoX, sistema de Banco de Dados XML Nativo em fase de desenvolvimento na Universidade Federal ...

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We illustrate the use of functional system speci cations and their re nement in the development of system components by a simple case study The development includes the modular speci cation re nement and veri cation of system components We start the development with an informal description of the tasks of the case study and then step by step carry out the tasks formally The informal requirement...