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» Extended Query Answering Using Integrity Rules
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CBMS
2006
IEEE
14 years 2 months ago
An Ontology-Driven Mediator for Querying Time-Oriented Biomedical Data
— Most biomedical research databases contain considerable amounts of time-oriented data. However, temporal knowledge about the contextual meaning of such data is not usually repr...
Martin J. O'Connor, Ravi Shankar, Amar K. Das
ICLP
2007
Springer
14 years 2 months ago
DLVHEX-SPARQL: A SPARQL Compliant Query Engine Based on DLVHEX
This paper describes the dlvhex SPARQL plugin, a query processor for the upcoming Semantic Web query language standard by W3C. We report on the implementation of this languages usi...
Axel Polleres, Roman Schindlauer
EDBT
2006
ACM
127views Database» more  EDBT 2006»
14 years 9 months ago
Progressive Query Optimization for Federated Queries
Federated queries are regular relational queries accessing data on one or more remote relational or non-relational data sources, possibly combining them with tables stored in the ...
Stephan Ewen, Holger Kache, Volker Markl, Vijaysha...
PVLDB
2008
131views more  PVLDB 2008»
13 years 8 months ago
Learning to create data-integrating queries
The number of potentially-related data resources available for querying -- databases, data warehouses, virtual integrated schemas -continues to grow rapidly. Perhaps no area has s...
Partha Pratim Talukdar, Marie Jacob, Muhammad Salm...
TCS
2008
13 years 8 months ago
Integration of a security type system into a program logic
Type systems and program logics are often conceived to be at opposing ends of the spectrum of formal software analyses. In this paper we show that a flow-sensitive type system ensu...
Reiner Hähnle, Jing Pan, Philipp Rümmer,...