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DLOG
2006
14 years 11 months ago
Data Complexity of Answering Unions of Conjunctive Queries in SHIQ
The novel context of accessing and querying large data repositories through ontologies that are formalized in terms of expressive DLs requires on the one hand to consider query an...
Magdalena Ortiz, Diego Calvanese, Thomas Eiter
DEXAW
2010
IEEE
150views Database» more  DEXAW 2010»
14 years 11 months ago
Search Strategies for Keyword-based Queries
Given a set of keywords, we find a maximum Web query (containing the most keywords possible) that respects userdefined bounds on the number of returned hits. We assume a real-world...
Matthias Hagen, Benno Stein
ICDE
2011
IEEE
232views Database» more  ICDE 2011»
14 years 1 months ago
XClean: Providing valid spelling suggestions for XML keyword queries
—An important facility to aid keyword search on XML data is suggesting alternative queries when user queries contain typographical errors. Query suggestion thus can improve users...
Yifei Lu, Wei Wang, Jianxin Li, Chengfei Liu
SIGIR
2004
ACM
15 years 3 months ago
Multiple sources of evidence for XML retrieval
Document-centric XML collections contain text-rich documents, marked up with XML tags. The tags add lightweight semantics to the text. Querying such collections calls for a hybrid...
Börkur Sigurbjörnsson, Jaap Kamps, Maart...
SAC
2003
ACM
15 years 3 months ago
Improving Image Retrieval Effectiveness in Query-by-Example Environment
Query-by-example is the most popular query model for today’s image retrieval systems. A typical query image contains not only relevant objects (e.g., Eiffel Tower), but also ir...
Khanh Vu, Kien A. Hua, Ning Jiang