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AAAI
2006
13 years 10 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...
LREC
2010
161views Education» more  LREC 2010»
13 years 10 months ago
Providing Multilingual, Multimodal Answers to Lexical Database Queries
Language users are increasingly turning to electronic resources to address their lexical information needs, due to their convenience and their ability to simultaneously capture di...
Gerard de Melo, Gerhard Weikum
IJSWIS
2008
135views more  IJSWIS 2008»
13 years 8 months ago
Efficient Processing of RDF Queries with Nested Optional Graph Patterns in an RDBMS
Relational technology has shown to be very useful for scalable Semantic Web data management. Numerous researchers have proposed to use RDBMSs to store and query voluminous RDF dat...
Artem Chebotko, Shiyong Lu, Mustafa Atay, Farshad ...
SIGMOD
2008
ACM
150views Database» more  SIGMOD 2008»
14 years 9 months ago
Query biased snippet generation in XML search
Snippets are used by almost every text search engine to complement ranking scheme in order to effectively handle user searches, which are inherently ambiguous and whose relevance ...
Yu Huang, Ziyang Liu, Yi Chen
SEMWEB
2004
Springer
14 years 2 months ago
Query Answering for OWL-DL with Rules
Both OWL-DL and function-free Horn rules3 are decidable logics with interesting, yet orthogonal expressive power: from the rules perspective, OWL-DL is restricted to tree-like rule...
Boris Motik, Ulrike Sattler, Rudi Studer