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OWLED
2008
13 years 5 months ago
What Causes Pneumonia? The Case for a Standard Semantics for "may" in OWL
: One of users' most frequent questions about OWL is "how do I say `may'?", as in "Bacteria may cause pneumonia." In many fields, particularly biomedi...
Alan L. Rector, Robert Stevens, Nick Drummond
ESWS
2008
Springer
13 years 5 months ago
Foundations of RDF Databases
The goal of this paper is to give an overview of the basics of the theory of RDF databases. We provide a formal definition of RDF that includes the features that distinguish this m...
Claudio Gutierrez
PODS
2010
ACM
159views Database» more  PODS 2010»
13 years 5 months ago
On probabilistic fixpoint and Markov chain query languages
We study highly expressive query languages such as datalog, fixpoint, and while-languages on probabilistic databases. We generalize these languages such that computation steps (e....
Daniel Deutch, Christoph Koch, Tova Milo
NGITS
1995
Springer
13 years 7 months ago
A History-Oriented Temporal SQL Extension
Dozens of temporal extension of the relational data model and of the query language SQL have appeared in recent years. Recently, a committee formed by researchers from the academi...
Fabio Grandi, Maria Rita Scalas, Paolo Tiberio
ERCIMDL
2006
Springer
147views Education» more  ERCIMDL 2006»
13 years 7 months ago
An Enhanced Search Interface for Information Discovery from Digital Libraries
Libraries, museums, and other organizations make their electronic contents available to a growing number of users on the Web. A large fraction of the information published is store...
Georgia Koutrika, Alkis Simitsis
CINQ
2004
Springer
151views Database» more  CINQ 2004»
13 years 7 months ago
Query Languages Supporting Descriptive Rule Mining: A Comparative Study
Recently, inductive databases (IDBs) have been proposed to tackle the problem of knowledge discovery from huge databases. With an IDB, the user/analyst performs a set of very diffe...
Marco Botta, Jean-François Boulicaut, Cyril...
COOPIS
1994
IEEE
13 years 7 months ago
Query Translation Supporting the Migration of Legacy Databases into Cooperative Information Systems
In this paper, we present a query translation algorithm which allows object-oriented queries to be automatically translated into a relational query language. Our goal is to provid...
Daniel A. Keim, Hans-Peter Kriegel, Andreas Mieths...
DBPL
1997
Springer
94views Database» more  DBPL 1997»
13 years 7 months ago
Querying Multidimensional Databases
Abstract. Multidimensional databases are large collections of data, often historical, used for sophisticated analysis oriented to decision making. This activity is supported by an ...
Luca Cabibbo, Riccardo Torlone
SSDBM
1998
IEEE
113views Database» more  SSDBM 1998»
13 years 7 months ago
From a Procedural to a Visual Query Language for OLAP
We address the issue of designing effective query languages for OLAP databases. The basis of our investigation is MD, a new data model for multidimensional databases that, unlike ...
Luca Cabibbo, Riccardo Torlone
VLDB
1999
ACM
87views Database» more  VLDB 1999»
13 years 7 months ago
Query Optimization for XML
XML is an emerging standard for data representation and exchange on the World-Wide Web. Due to the nature of information on the Web and the inherent flexibility of XML, we expect...
Jason McHugh, Jennifer Widom