In Building an XML viewer on AIR with Flex, Karl Matthews of Adobe demonstrates how easy it is to develop an XML document viewer in Adobe Flex, and then use Adobe AIR to package and deliver the application. A sample, using product information for a line of sunglasses, is used to show users how to develop an XML Viewer sample application. Although the focus in this article is to deliver a standalone application, the same Flex code can be reused to deliver a hosted Rich Internet Application (RIA) via a browser.