454 search results - page 4 / 91 » SPARQL Query Processing with Conventional Relational Databas... |
85
Voted
OWLED
2008
15 years 11 days ago
2008
We study conjunctive query answering in the description logic EL, the core of the designated OWL2-EL profile of OWL2. In particular, we present an approach that allows the use of c...
71
Voted
VLDB
2005
ACM
15 years 4 months ago
2005
ACM
With the increasing occurrence of temporal and spatial data in present-day database applications, the interval data type is adopted by more and more database systems. For an effic...
186
Voted
ICDE
2008
IEEE
16 years 9 days ago
2008
IEEE
This paper introduces U-relations, a succinct and purely relational representation system for uncertain databases. U-relations support attribute-level uncertainty using vertical pa...
DEXAW
2007
IEEE
15 years 5 months ago
2007
IEEE
The semantic web represents meta-data as a relation of triples using the RDF data model. We have developed a virtual repository system that enables to process queries to RDF views...
87
Voted
ER
2007
Springer
15 years 2 months ago
2007
Springer
The paper presents an unified Description Logic (DL) model for databases. Describing database models using DLs is a fundamental problem in many areas because it turns databases to...