MXML is an XML markup language that you use to lay out user interface components. You also use MXML to declaratively define nonvisual aspects of an application, such as access to data sources on the server.
Like HTML, MXML provides tags that define user interfaces. MXML will seem very familiar if you have worked with HTML. MXML includes tags for visual components such as data grids, trees, tab navigators, accordions, and menus, as well as nonvisual components that provide web service connections, data binding, and animation effects.
You can also extend MXML with custom components that you reference as MXML tags.
