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• has a Direction. It can be an input, an output, or both, 
• can be Static (optional),  
• has a Datatype (integer, boolean, real, string, void), 
• has a an Name,
• can be initialised (optional),
• can get a CombineOperator(optional) (-, +, *, max, min, or, and, host).
  
  

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• input boolean A; 
• output boolean A;
• input output boolean A; // double direction (input and output))
• input static boolean A; //static variable
• boolean A; //local, without direction
• input integer I=10; //the variable I is initialised
• input integer I with '+' //the combine operator is '+'

Signal Declarations

Signals are extended from Events. A signal has a direction and a Name.

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4 views to implement signals:

• don't use signals. Use only variables
• Boolean variables are interpreted as signals (no Boolean variables available)
• Yakindu events are interpreted as signals
• declare a new declarations type named signal

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