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http://dx.doi.org/10.3745/KIPSTD.2007.14-D.6.605

An Efficient Path Expression Join Algorithm Using XML Structure Context  

Kim, Hak-Soo (한양대학교 컴퓨터공학과)
Shin, Young-Jae (한양대학교 컴퓨터공학과)
Hwang, Jin-Ho (한양대학교 컴퓨터공학과)
Lee, Seung-Mi (한양대학교 컴퓨터공학과 BK21 AIS사업팀)
Son, Jin-Hyun (한양대학교 컴퓨터공학과)
Publication Information
The KIPS Transactions:PartD / v.14D, no.6, 2007 , pp. 605-614 More about this Journal
Abstract
As a standard query language to search XML data, XQuery and XPath were proposed by W3C. By widely using XQuery and XPath languages, recent researches focus on the development of query processing algorithm and data structure for efficiently processing XML query with the enormous XML database system. Recently, when processing XML path expressions, the concept of the structural join which may determine the structural relationship between XML elements, e.g., ancestor-descendant or parent-child, has been one of the dominant XPath processing mechanisms. However, structural joins which frequently occur in XPath query processing require high cost. In this paper, we propose a new structural join algorithm, called SISJ, based on our structured index, called SI, in order to process XPath queries efficiently. Experimental results show that our algorithm performs marginally better than previous ones. However, in the case of high recursive documents, it performed more than 30% by the pruning feature of the proposed method.
Keywords
XPath; Structural Join Algorithm; Path Expression;
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