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» A System for Semantic Query Optimization
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WM
2003
13 years 10 months ago
Ontologies in Cross-Language Information Retrieval
: We present an approach to using ontologies as interlingua in cross-language information retrieval in the medical domain. Our approach is based on using the Unified Medical Langu...
Martin Volk, Spela Vintar, Paul Buitelaar
SEMWEB
2007
Springer
14 years 3 months ago
YARS2: A Federated Repository for Querying Graph Structured Data from the Web
We present the architecture of an end-to-end semantic search engine that uses a graph data model to enable interactive query answering over structured and interlinked data collecte...
Andreas Harth, Jürgen Umbrich, Aidan Hogan, S...
VLDB
2002
ACM
129views Database» more  VLDB 2002»
13 years 9 months ago
Optimizing View Queries in ROLEX to Support Navigable Result Trees
An increasing number of applications use XML data published from relational databases. For speed and convenience, such applications routinely cache this XML data locally and acces...
Philip Bohannon, Sumit Ganguly, Henry F. Korth, P....
SIGMOD
2007
ACM
147views Database» more  SIGMOD 2007»
14 years 9 months ago
Extending relational query optimization to dynamic schemas for information integration in multidatabases
This paper extends relational processing and optimization to the FISQL/FIRA languages for dynamic schema queries over multidatabases. Dynamic schema queries involve the creation a...
Catharine M. Wyss, Felix I. Wyss
IJCAI
2003
13 years 10 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...