The ARINC 661 standard specifies an XML format which allows to define the Look Capacities and Definition of a CDS.
Structure
The structure of the Look Modelling XML file is separated between:
The Look Capacities, which specifies the CDS capacities of the CDS: it specifies the graphcial properties and the states the CDS can handle for every widget
The Look Definition which specifies the definition of the Look: it specifies the StyleSets and their associated graphical propeties values for each widget