Query XML Documents Using XTQ Language

Up to now many XML query languages, including XPath and XQuery which become the standard of XML query standard by W3C, have been prosposed. However, since the navigational query approach adopted by XPath can only get homogeneous data, it often incurs nested query in XQuery for complicated requirement. To overcome the shortcomings of XPath and XQuery, we proposed a new XML query language called XTQ based on pattern matching and logical XML tree expression. In this paper, we introduce the basic features of XTQ and illustrate its usage and merits with some selected XML query use cases from W3C.