ABSTRACT
There are two languages to create Flex applications: MXML and ActionScript 3. MXML is an eXtensible Markup Language (XML)-based language, used to define the layout of the user interface and its behaviors, whereas ActionScript 3 is the core scripting language, mainly adopted to define the logic. To create an application we create a set of files that are fed into the Flex compiler, which generates an SWF file that is visualizable in every browser with the Flash player installed ( Figure 1.1 ).
