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» Rewriting queries on SPARQL views
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2009
13 years 5 months ago
Application of Named Graphs Towards Custom Provenance Views
Provenance capture as applied to execution oriented and interactive workflows is designed to record minute detail needed to support a "modify and restart" paradigm as we...
Tara Gibson, Karen Schuchardt, Eric G. Stephan
CIKM
2007
Springer
14 years 1 months ago
Towards practically feasible answering of regular path queries in lav data integration
Regular path queries (RPQ’s) are given by means of regular expressions and ask for matching patterns on labeled graphs. RPQ’s have received great attention in the context of s...
Manuel Tamashiro, Alex Thomo, Srinivasan Venkatesh
ICDE
2006
IEEE
139views Database» more  ICDE 2006»
14 years 9 months ago
MiniCount: Efficient Rewriting of COUNT-Queries Using Views
We present MiniCount, the first efficient sound and complete algorithm for finding maximally contained rewritings of conjunctive queries with count, using conjunctive views with c...
Prodromos Malakasiotis, Václav Lín, ...
IJCAI
2003
13 years 9 months ago
Query rewriting and answering under constraints in data integration systems
In this paper we address the problem of query answering and rewriting in global-as-view data integration systems, when key and inclusion dependencies are expressed on the global i...
Andrea Calì, Domenico Lembo, Riccardo Rosat...
AAAI
2006
13 years 9 months ago
Compilation of Query-Rewriting Problems into Tractable Fragments of Propositional Logic
We consider the problem of rewriting a query efficiently using materialized views. In the context of information integration, this problem has received significant attention in th...
Yolifé Arvelo, Blai Bonet, Maria-Esther Vid...