Building user interaction 105 id="loginPanel" x="211" y="99" title="Login"/> </s:Application> As you can see, the code is much more understandable and orga- nized, while the functionality is exactly the same as the previous implementation. Flex 4 components In this section we illustrate some components that can be immediately useful for your first application: DataGroup and vali- dators. While learning how to use DataGroup we will also explain how a data-driven component works by illustrating its key fea- tures: dataProvider and itemRenderer . datagroup DataGroup is a new layout component introduced in the Flex DataGroup is