9 search results - page 1 / 2 » Scalable query rewriting: a graph-based approach |
SIGMOD
2011
ACM
12 years 7 months ago
2011
ACM
In this paper we consider the problem of answering queries using views, which is important for data integration, query optimization, and data warehouses. We consider its simplest ...
WWW
2011
ACM
12 years 11 months ago
2011
ACM
The problem of answering SPARQL queries over virtual SPARQL views is commonly encountered in a number of settings, including while enforcing security policies to access RDF data, ...
SIGMOD
2001
ACM
14 years 4 months ago
2001
ACM
We study the problem of generating e cient, equivalent rewritings using views to compute the answer to a query. We take the closed-world assumption, in which views are materialize...
VLDB
2004
ACM
13 years 10 months ago
2004
ACM
This paper presents a novel and complementary technique to optimize an XPath query by minimizing its wildcard steps. Our approach is based on using a general composite axis called...
WEBDB
2010
Springer
13 years 2 months ago
2010
Springer
The Semantic Web, which represents a web of knowledge, offers new opportunities to search for knowledge and information. To harvest such search power requires robust and scalable ...