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Bekiropoulos K.,Alexander Technology Educational Institute ATEI | Keramopoulos E.,Alexander Technology Educational Institute ATEI | Beza O.,Alexander Technology Educational Institute ATEI | Mouratidis P.,Alexander Technology Educational Institute ATEI
Computer Systems Science and Engineering | Year: 2013

Extensible Markup Language (XML) tends to become a standard way of data interchanging on the Web. Therefore a need for one or more languages was created, that will have the ability to manage and extract data from XML sources. In addition, the data on the Web do not always have strict structure (semistructured data). As a result, query languages should be able to retrieve information from these data too. XQuery is the W3C standard to retrieve information from XML documents. Moreover, graphical user interfaces are user friendly enough for naive users to use them. Thus, a graphical query language for XML documents is a very interesting research field. In this paper we draw a list of features that a graphical query language for XML documents should support. Moreover, we examine how the most representative graphical query languages for XML data have presented those features. Finally, in order to compare the languages, we present a comparison table. ©2013 CRL Publishing Ltd. Source

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