654 search results - page 45 / 131 » Complexity of Answering Queries Using Materialized Views |
AAAI
2007
13 years 10 months ago
2007
Efficient query answering over ontologies is one of the most useful and important services to support Semantic Web applications. Approximation has been identified as a potential...
PVLDB
2010
13 years 3 months ago
2010
Top-k spatial preference queries return a ranked set of the k best data objects based on the scores of feature objects in their spatial neighborhood. Despite the wide range of loc...
TAL
2010
Springer
13 years 6 months ago
2010
Springer
Abstract. The question answering systems are considered the next generation of search engines. This paper focuses on the first step of this process, which is to search for relevant...
SIGMOD
1999
ACM
14 years 24 days ago
1999
ACM
We address the problem of query rewriting for TSL, a language for querying semistructured data. We develop and present an algorithm that, given a semistructured query q and a set ...
DILS
2006
Springer
14 years 5 days ago
2006
Springer
The Open Biomedical Ontologies (OBO) is a consortium that serves as a repository of ontologies that are structured like directed acyclic graphs. In this paper we present a language...