Fundamentals > Relations and Parameters > Relations > Relations in Assemblies > To Specify a Parameter in Another Model
  
To Specify a Parameter in Another Model
If you refer to a parameter that belongs to another model, the parameter must include the Session ID of the referenced model.
The format for assembly relations is as follows:
XYZ = parameter_name:session_id
where
XYZ is a parameter in the currently selected model.
parameter_name is a parameter in the referenced model.
session_id is the Session ID of the referenced model.
In the general case, you can express the preceding relations as follows:
XYZ:session_id_1 = parameter_name:session_id_2
where
session_id_1 is the Session ID of the driven parameter’s model.
session_id_2 is the Session ID of the driving parameter’s model.