Wireless Markup Language (WML) is a "flavor" of XML for mobile devices. It is conceived as a series of hyperlinked cards (screens) much like the original Apple Macintosh Hyperlinked cards. Navigation is done via WML scripts and interaction with the buttons on a mobile device.
To view a WML document as it would be intended to display in a mobile device, you would need a simulator. But just to see the code, here is an example, drawing as usual on my Gazetteer of Spain theme -- a series of cards of major Spanish provinces...>> Caution: you may need to view this file in Notepad -- your computer system may interpret WML files in a wide range of ways!