You can use XML objects within XPRESS anywhere an expression is allowed. In the example below, a map is passed as an argument to an invoked method.
<invoke name=’printTheMap’> <ref>mapPrinter</ref> <Map> </Map> </invoke>
In releases prior to 2.0, XPRESS required that all XML Objects be wrapped in an <o> element. While this is no longer required, you may still encounter its use in older files containing XPRESS.