116 search results - page 2 / 24 » Rewriting queries on SPARQL views |
GEOS
2009
Springer
14 years 7 days ago
2009
Springer
Abstract. Often the information present in a spatial knowledge base is represented at a different level of granularity and abstraction than the query constraints. For querying onto...
WWW
2008
ACM
14 years 8 months ago
2008
ACM
Easy reuse and integration of declaratively described information in a distributed setting is one of the main motivations for building the Semantic Web. Despite of this claim, reu...
SEMWEB
2009
Springer
14 years 2 months ago
2009
Springer
RDF Schema (RDFS) as a lightweight ontology language is gaining popularity and, consequently, tools for scalable RDFS inference and querying are needed. SPARQL has become recently ...
AMW
2011
12 years 11 months ago
2011
Subqueries are a poweful feature which allows to enforce reuse, composition, rewriting and optimization in a query language. In this paper we perform a comprehensive study of the i...
ESWS
2008
Springer
13 years 9 months ago
2008
Springer
Integrated access to multiple distributed and autonomous RDF data sources is a key challenge for many semantic web applications. As a reaction to this challenge, SPARQL, the W3C Re...