NGS: a framework for multi-domain query answering

被引：0
|
作者：
Braga, D. [1 ]
Calvanese, D. [2 ]
Campi, A. [1 ]
Ceri, S. [1 ]
Daniel, F. [1 ]
Martinenghi, D. [1 ]
Merialdo, P. [3 ]
Torlone, R. [3 ]
机构：
[1] Politecn Milan, Dip Elettron & Informaz, Piazza L da Vinci 32, I-20133 Milan, Italy
[2] Free Univ Bozen Bolzano, Fac Comp Sci, Bolzano, Italy
[3] Univ Rome Tre, Dipartimento Informat & Automaz, Rome, Italy
来源：
2008 IEEE 24TH INTERNATIONAL CONFERENCE ON DATA ENGINEERING WORKSHOP, VOLS 1 AND 2 | 2008年
关键词：
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
If we consider a query involving multiple domains, such as "find all database conferences held within six months in locations whose seasonal average temperature is 28 degrees C and for which a cheap travel solution exists", we note that (i) generalpurpose search engines fail to answer multi-domain queries and (ii) specific search services may cover one of such domains, but no general integration framework is readily available. Currently, the only way to treat such cases is to separately query dedicated services and feed the result of one search as input to another, or to pairwise compare them by hand. This paper presents NGS, a framework providing fully automated support for cross-domain queries. In particular, NGS (a) integrates different kinds of services (search engines, web services, and wrapped web pages) into a global ontology, i.e., a unified view of the concepts supported by the available services, (b) covers query formulation aspects over the global ontology, and query rewriting in terms of the actual services, and (c) offers several optimization opportunities leveraging the characteristics of the different services at hand, based on several different cost metrics.
引用
收藏
页码：321 / +
页数：2
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