What does the abstract user interface tree contain?

The abstract user interface defines a tree of objects organized by parent/child relationship. The different kinds of user interface objects are defined by attributes. The AUI tree can be serialized as text according to the XML standard notation.

The following example shows a part of an AUI tree defining a toolbar serialized with the XML notation:

<ToolBar>
  <ToolBarItem name="f5" text="List" image="list" />
  <ToolBarSeparator/>
  <ToolBarItem name="Query" text="Query" image="search" />
  <ToolBarItem name="Add" text="Append" image="add" />
  ...
</ToolBar>