document: XQuery at your web service XML messaging is at the heart of Web services , providing the flexibility required for their deployment , composition , and maintenance . Yet , current approaches to Web services development hide the messaging layer behind Java or C # APIs , preventing the application to get direct access to the underlying XML information . To address this problem , we advocate the use of a native XML language , namely XQuery , as an integral part of the Web services development infrastructure . The main contribution of the paper is a binding between WSDL , the Web Services Description Language , and XQuery . The approach enables the use of XQuery for both Web services deployment and composition . We present a simple command-line tool that can be used to automatically deploy a Web service from a given XQuery module , and extend the XQuery language itself with a statement for accessing one or more Web services . The binding provides tight-coupling between WSDL and XQuery , yielding additional benefits , notably : the ability to use WSDL as an interface language for XQuery , and the ability to perform static typing on XQuery programs that include Web service calls . Last but not least , the proposal requires only minimal changes to the existing infrastructure . We report on our experience implementing this approach in the Galax XQuery processor .
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