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listCPPFiles.xq Example File
xmlpatterns/filetree/listCPPFiles.xq 

 declare variable $exampleDirectory external;
 <html>
     <head>
         <title>All cpp files in: {string($exampleDirectory/@fileName)}</title>
     </head>
     <body>
         <p>The following cpp-files were found in Qt's example directory, sorted by file size:</p>
         <ul>
             {
                 for $file in $exampleDirectory//file[@suffix = "cpp"]
                 order by xs:integer($file/@size)
                 return <li>
                             {string($file/@fileName)}, size: {string($file/@size)}
                        </li>
             }
         </ul>
     </body>
 </html>

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Qt 4.4.0-beta1