Number

Type:Vector<int>
Range:[v_1, …]
Default:-/-
Appearance:optional

, or

Type:Vector<enum>
Range:[v_1, …], v=East|South|West

This defines the number of the boundary of the geometrical primitive to which the mesh constraint is to be applied. A vector definition listing multiple boundaries is allowed. A named tangential Port can also be used (see here for their definition).