[henshin-dev] [in] and [out] Syntax for nodes

[Christian Krause <henshin.ck@xxxxxxxxx>]

Hi,

I'm a bit confused about the [in] and [out] notation for nodes in the 
graphical editor. The parameter names can be inspected and changed 
already in the rule title. As I understand, whether a parameter is 
in/out/both is merely determined by the ParameterMappings as given in 
the context of a unit or as arguments when applying the rule in the 
interpreter.

Stefan mentioned the case where the name of an object changes, e.g.: 
"myRule(x,y)" where an object "x" is matched and the same object is 
returned as "y". For this case, I thought, we could use the arrow 
notation "x->y" (similarly to attributes).

To make a long story short: I do not see the need for the [in] / [out] 
notation (?).

Cheers,
Christian