• Bases de datos relacionales (Capítulos 4 al 7). El Capítulo 4 se centra en el lenguaje
relacional orientado al usuario de mayor influencia: SQL. El Capítulo 5 cubre otros dos …

Recently, the database research literature has seen an explosion of publications with the
goal of using an RDBMS to store and/or query XML data. The problems addressed and …

XML is quickly becoming the de facto standard for data exchange over the Internet. This is
creating a new set of data management requirements involving XML, such as the need to …

Though skyline queries already have claimed their place in retrieval over central databases,
their application in Web information systems up to now was impossible due to the distributed …

Answering XML Queries over Heterogeneous Data Sources Page 1 "! & %(') 1 02 7%8! @
9BAC3DA EF%8!G QSRUTWVXTF Y`TaVbRdcfe p Qrqts$QSu8vw s$Rxh#y Vbh#Rdpb …

XML is rapidly emerging as a standard for exchanging business data on the World Wide
Web. For the foreseeable future, however, most business data will continue to be stored in …

XML has emerged as the standard data exchange format for Internet-based business
applications. This has created the need to publish existing business data, stored in relational …

The data produced by various services should be stored and managed in an appropriate
format for gaining valuable knowledge conveniently. This leads to the emergence of various …

We state and solve the query reformulation problem for XML publishing in a general setting
that allows mixed (XML and relational) storage for the proprietary data and exploits …

The present invention overcomes many of the Shortcom ings of the prior art. In addition, the
present invention addresses the problem of automating the conversion of relational data into …