DVQ: Towards Visual Query Processing of XML Database Systems

Authors: Zheng S.¹; Zhou A.²; Zhang L.³; Lu H.⁴

Source: World Wide Web, Volume 6, Number 2, June 2003 , pp. 233-253(21)

Publisher: Springer

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Abstract:

XML has been recognized as a promising language for data exchange over the Internet. A number of query languages have been proposed for querying XML data. Most of those languages are path-expression based. One difficulty in forming path-expression based queries is that users have to know the structure of XML data against which the queries were issued. In this paper, we describe a DTD-driven visual query interface for XML database systems. With such an interface, a user can easily form path-expression based queries by clicking elements in the DTD tree displayed on the screen and supplying conditions if necessary. The interface and the query generation process are described in detail.

Keywords: XML; DTD; visual query; path expressions

Language: English

Document Type: Research article

Affiliations: 1: Department of Computer Science & Engineering, Fudan University, Shanghai 200433, China shzheng0@fudan.edu.cn 2: Department of Computer Science & Engineering, Fudan University, Shanghai 200433, China 3: Department of Computer Science & Engineering, Fudan University, Shanghai 200433, China ayzhou@fudan.edu.cn 4: Computer Science Department, Hong Kong University of Science & Technology, Hong Kong, China luhj@cs.ust.hk

Publication date: 2003-06-01