Advances in Data and Web Management: Joint 9th Asia-Pacific by Christos Faloutsos (auth.), Guozhu Dong, Xuemin Lin, Wei

By Christos Faloutsos (auth.), Guozhu Dong, Xuemin Lin, Wei Wang, Yun Yang, Jeffrey Xu Yu (eds.)

The fast incidence of net purposes calls for new applied sciences for the - signal, implementation and administration of Web-based info structures, and for the administration and research of data on the net. The joint AP- Web/WAIM 2007 convention, combining the traditions of APWeb and WAIM conferences,wasaninternationalforumforresearchers,practitioners,developers and clients to percentage and trade state-of-the-art principles, effects, event, te- niques and instruments in reference to all facets of internet facts administration. The convention drew jointly unique examine and commercial papers at the idea, layout and implementation of Web-based info structures and at the m- agement and research of data on the net. The convention was once held within the attractive mountain region of Huang Shan (Yellow Mountains) — the one twin international history indexed quarter in China for its extraordinary typical good looks and richandwell-preservedculture. Theseproceedingscollectedthe technicalpapers chosen for presentation on the convention, held at Huang Shan, June 16–18, 2007. in line with the decision for papers, this system Committee obtained 554 full-paper submissions from North the US, South the USA, Europe, Asia, and Oceania. each one submitted paper underwent a rigorous evaluation via 3 in- pendent referees, with particular evaluation experiences. ultimately, forty seven complete examine papers and 36 brief learn papers have been authorised, from Austria, Australia, Canada, China,Cyprus,Greece,HongKong,Japan,Korea,Singapore,Taiwan,andUSA, representing a aggressive attractiveness fee of 15%.

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Extra info for Advances in Data and Web Management: Joint 9th Asia-Pacific Web Conference, APWeb 2007, and 8th International Conference, on Web-Age Information Management, WAIM 2007, Huang Shan, China, June 16-18, 2007. Proceedings

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With the increasing research interest on ontology and semantic web, ontologybased semantic search over relational databases has become a ‘hot’ research topic in database community [17, 18]. So, exploiting ontology to improve the effectiveness of KSORD receives increasing attention. 3 Efficiency Improvements on KSORD In recent years, we have developed many techniques to optimize the efficiency of online KSORD systems. Aiming at improving SO-KSORD systems, we proposed a new preprocessing approach PreCN [21] to improve the generation efficiency of CN, and CLASCN [24] and QuickCN [26] methods to improve the execution efficiency of CN.

This is shown in Figure 4. Essentially, the system extracts the context of the document (again, a set of keywords for the purpose of this example) and uses this context as an anchor into the DB2 database. The relational data can be presented in to the user in a browse-able manner. 34 P. Roy and M. Mohania Clearly, such functionality cannot be achieved by querying DB2 and CM independently. In the first case CM uses the context retrieved from DB2 to identify relevant documents, while in the second case DB2 uses the context retrieved from CM to identify the relevant database fragment.

As for boolean-OR semantic keyword queries in IR-Style [8] and SEEKER [5], we find out that Gts patterns can be viewed as user keyword query patterns for a given Gs . All CNs under the limitation of MaxCNsize and Maximum allowed Keyword Number(MaxKeywNum) can be generated in advance through a breadth-first traversal of the maximum Gts , and then stored in the database. When a user query arrives, its proper CNs are directly retrieved from the database. This method is called PreCN [21]. PeCN is simpler and more efficient than that in [22].

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