gcsDefinitions: {gcsDefinitions}
	(datatypes+=Datatype)*
	'attributes' (attributes+=Attribute)* 'end'
	'timerAttributes' '{' (timerAttributes+=TimerAttribute)+ '}'
	;

TimerAttribute:
	name=ID;

Timer:
    'timer' name=ID
    ('attributes' (timerAttributes+=[TimerAttribute])*)?
    'timeconfig' (timeConfigPar=[ParTag]
              |timerValue=TimeValue|'stateDefined')
    ('IN' in=[Tag])?
    'end_timer';

timerAttributes {ton withOutputTag withParameter restartable recalcable}

timer TransitionTime
attributes ton recalcable withOutputTag 
timeconfig stateDefined
end_timer	

Boolean hasAttribute(Timer timer, String name) : timer. timerAttributes.exists( a | a.name == name);