Sciweavers

3269 search results - page 258 / 654
» Query Optimization for XML
Sort
View
CIKM
2010
Springer
15 years 3 months ago
Query optimization for ontology-based information integration
In recent years, there has been an explosion of publicly available RDF and OWL data sources. In order to effectively and quickly answer queries in such an environment, we present...
Yingjie Li, Jeff Heflin
DEXA
2000
Springer
98views Database» more  DEXA 2000»
15 years 9 months ago
Optimal Page Ordering for Region Queries in Static Spatial Databases
Page ordering is to define the order of pages in one-dimensional storage for storing two-dimensional spatial data to reduce the number of disk seeks. Previous works relating to pag...
Daesoo Cho, Bonghee Hong
AAAI
2008
15 years 6 months ago
Worst-case Optimal Conjunctive Query Answering for an Expressive Description Logic without Inverses
Answering conjunctive queries (CQs) has been recognized as a key task for the usage of Description Logics (DLs) in a number of applications, and has thus been studied by many auth...
Magdalena Ortiz, Mantas Simkus, Thomas Eiter
VLDB
2001
ACM
86views Database» more  VLDB 2001»
16 years 4 months ago
A graph-theoretic model for optimizing queries involving methods
Chiang Lee, Chi-Sheng Shih, Yaw-Huei Chen
SIAMCOMP
2012
13 years 7 months ago
An Optimal Dynamic Data Structure for Stabbing-Semigroup Queries
Let S be a set of n intervals in R, and let (S, +) be any commutative semigroup. We assign a weight ω(s) ∈ S to each interval in S. For a point x ∈ R, let S(x) ⊆ S be the se...
Pankaj K. Agarwal, Lars Arge, Haim Kaplan, Eyal Mo...