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GEOINFORMATICA
1998
14 years 9 months ago
1998
ally related entity types, or classes, into higher level, more abstract types, as part of a hierarchical classi®cation scheme. graphy, generalization retains the notion of abstrac...
RSKT
2007
Springer
15 years 3 months ago
2007
Springer
Abstract. A fundamental data modeling problem in geographical information systems and spatial database systems refers to an appropriate treatment of the vagueness or indeterminacy ...
JUCS
2010
14 years 4 months ago
2010
: We initiate in this work the study of a sort of redundancy problem revealed by what we call redundant relations. Roughly, we define a redundant relation in a database instance (d...
EDBT
2008
ACM
15 years 10 months ago
2008
ACM
XML Schema awareness has been an integral part of the XQuery language since its early design stages. Matching XML data against XML types is the main operation that backs up XQuery...
JCSS
2002
14 years 9 months ago
2002
A database programming language is a programming language extended with database operations. In this paper we extend a core functional language with explicitly labeled tuples and ...