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VLDB
1989
ACM
114views Database» more  VLDB 1989»
13 years 8 months ago
Extending the Relational Algebra to Capture Complex Objects
An important direction in database research for non-standard applications (e.g. engineering or design applications) deals with adequate support for complex objects. Without doubt,...
Bernhard Mitschang
DEXAW
2008
IEEE
145views Database» more  DEXAW 2008»
13 years 6 months ago
ECQ: A Simple Query Language for the Semantic Web
With the increasing development of real applications using Semantic Web Technologies, it is necessary to provide scalable and efficient ontology querying and reasoning systems. In ...
María del Mar Roldán García, ...
SEMWEB
2010
Springer
13 years 2 months ago
Representing and Querying Validity Time in RDF and OWL: A Logic-Based Approach
RDF(S) and OWL 2 currently support only static ontologies. In practice, however, the truth of statements often changes with time, and Semantic Web applications often need to repres...
Boris Motik
WWW
2007
ACM
14 years 5 months ago
SPARQ2L: towards support for subgraph extraction queries in rdf databases
Many applications in analytical domains often have the need to "connect the dots" i.e., query about the structure of data. In bioinformatics for example, it is typical t...
Kemafor Anyanwu, Angela Maduko, Amit P. Sheth
SEMCO
2009
IEEE
13 years 11 months ago
An Algebraic Language for Semantic Data Integration on the Hidden Web
Semantic integration in the hidden Web is an emerging area of research where traditional assumptions do not always hold. Frequent changes, conflicts and the sheer size of the hid...
Shazzad Hosain, Hasan M. Jamil