Sciweavers

347 search results - page 39 / 70
» Certain answers for XML queries
Sort
View
EDBT
2002
ACM
129views Database» more  EDBT 2002»
14 years 8 months ago
Schema-Driven Evaluation of Approximate Tree-Pattern Queries
Abstract. We present a simple query language for XML, which supports hierarchical, Boolean-connected query patterns. The interpretation of a query is founded on cost-based query tr...
Torsten Schlieder
CORR
2010
Springer
142views Education» more  CORR 2010»
13 years 8 months ago
XPath Whole Query Optimization
Previous work reports about SXSI, a fast XPath engine which executes tree automata over compressed XML indexes. Here, reasons are investigated why SXSI is so fast. It is shown tha...
Sebastian Maneth, Kim Nguyen
VLDB
2007
ACM
229views Database» more  VLDB 2007»
14 years 2 months ago
Sum-Max Monotonic Ranked Joins for Evaluating Top-K Twig Queries on Weighted Data Graphs
In many applications, the underlying data (the web, an XML document, or a relational database) can be seen as a graph. These graphs may be enriched with weights, associated with t...
Yan Qi 0002, K. Selçuk Candan, Maria Luisa ...
ICDE
2007
IEEE
126views Database» more  ICDE 2007»
14 years 10 months ago
Location-based Spatial Queries with Data Sharing in Wireless Broadcast Environments
Location-based spatial queries (LBSQs) refer to spatial queries whose answers rely on the location of the inquirer. Efficient processing of LBSQs is of critical importance with th...
Wei-Shinn Ku, Roger Zimmermann, Haixun Wang
ICDE
2008
IEEE
127views Database» more  ICDE 2008»
14 years 10 months ago
Querying Data under Access Limitations
Data sources on the web are often accessible through web interfaces that present them as relational tables, but require certain attributes to be mandatorily selected, e.g., via a w...
Andrea Calì, Davide Martinenghi