gui, lol.

Property Name="UnifiedAreaRect" Value="{{left_relative,left_offset},{top_relative,top_offset},{right_relative,right_offset},{bottom_relative,bottom_offset}}" />

the awesomenes of CEGUIs layout syntax > all.
ok, the only other layout syntax i know is css and it sucks so much.

>>11
exactly. Some people do have a clue with XML. However, most just go "EXECUTABLE XML, LESS CODE LAWL" and shift the code into 4 times more XML in addition to the zillion libraries needed to support the parsing of their poorly reinvented wheel.