names = getComponentNames(ar,compKind)
uses the compKind argument to specify the type of software component to return. You can narrow the search to a specific type of atomic software component, such as 'Application' or 'SensorActuator', or specify a nonatomic component, such as 'Composition' or 'Parameter'.
compKind — Component type
'Atomic' (default) | 'Application' | 'ComplexDeviceDriver' | 'Composition' | 'EcuAbstraction' | 'Parameter' | 'SensorActuator' | 'ServiceProxy'
in your case,
to get the list of Compositions:
ar = arxml.importer('xxxxx.arxml');
names = getComponentNames(ar,'Composition')
