author = "Saltor Soler, Félix Enrique"

Encontrado 26 documentos, página mostrada 1 de 3

Semantic integration on spatial databases: SIT-SD prototype

Description: Progress on data integration has come to the point that we must deal with the need of semantic integration. ln this work we present a prototype of an integration tool of information sources (Semantic lntegration Tool for Spatial Data). lt focuses, on schema integration of spatial databases. This too...
Language(s): Inglés

Information system architecture for secure data warehousing

Description: This paper is devoted to Secure Data Warehousing architecture and its data schemas. We relate a federated databases architecture to Data Warehouse schemas, which allows us to provide better understanding to the characteristics of every schema, as well as the way they should be defined. Because of th...
Language(s): Inglés

On schema and functional architectures for multilevel secure and multiuser model federated DB systems

Description: This paper presents an approach for tightly federated database systems with several federated schemas that consists of a schema architecture and a functional architecture. The reference schema architecture has been extended to deal with security aspects not well solved previously. The functional arc...
Language(s): Inglés

Extraction of data dependencies

Description: Relational database schemas must be semantically enriched to reflect knowledge about the data, as needed by many applications. One technique is the analysis of the database extension, extracting existing data dependencies. In this paper, new algorithms to extract functional and inclusion dependencie...
Language(s): Inglés

On architectures for federated DB systems

Description: Different architectures for federated database systems have been proposed. We present three federation rules, analogous to the rules for fragmentation in distributed databases, and show that the reference architecture by Sheth and Larson satisfies them. We then analyze three shortcomings of the refe...
Language(s): Inglés

YAM2 (Yet Another Multidimensional Model): an extension of UML

Description: This paper presents a multidimensional conceptual Object-Oriented model, its structures, integrity constraints and query operations. It has been developed as an extension of UML core metaclasses to facilitate its usage, as well as to avoid the introduction of completely new concepts. YAM2 allows the...
Language(s): Inglés

Encontrado 26 documentos, página mostrada 1 de 3

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