491 search results - page 17 / 99 » Optimizing complex queries with multiple relation instances |
ESWS
2010
Springer
14 years 10 days ago
2010
Springer
While the Semantic Web is rapidly filling up, appropriate tools for searching it are still at infancy. In this paper we describe an approach that allows humans to access informatio...
ICDE
2007
IEEE
14 years 9 months ago
2007
IEEE
Skyline query processing has been investigated extensively in recent years, mostly for only one query reference point. An example of a single-source skyline query is to find hotel...
FOCS
2003
IEEE
14 years 25 days ago
2003
IEEE
We give a complexity theoretic classification of homomorphism problems for graphs and, more generally, relational structures obtained by restricting the left hand side structure ...
ICDE
2003
IEEE
14 years 9 months ago
2003
IEEE
Structural join operations are central to evaluating queries against XML data, and are typically responsible for consuming a lion's share of the query processing time. Thus, ...
INFOCOM
2006
IEEE
14 years 1 months ago
2006
IEEE
— We study the complexity of a spectrum of design problems for optical networks in order to carry a set of demands. Under wavelength division multiplexing (WDM) technology, deman...