Print Name Tags/Labels with Barcode from XML input data

Given a URL for access to an XML document containing information on individuals: 1. Provide a user interface to obtain the source information (i.e. the XML document), and to define the output label format; e.g. top margin, left margin, number of columns, column width, column separation, row height, and font size. 2. Access the XML document. 3. Extract the individuals First Name, Last name and ID number from the XML data. 4. Format the data for output as First and Last Names on one line and ID in Code 39 barcode on the second line. 5. Output (print) the resulting document to user selected printer. I would prefer this to be a web applet/plug-in, but will consider a desktop application. If a plug-in, I need for it to work on IE, Firefox and Safari at a minimum. If a desktop, I need it to run on both Windows and Mac, which probably means a Java app.