[henshin-dev] Compare two node's attributes in rule?

[Jens Bürger <jens.buerger@xxxxxxxxxxxxxxxxx>]

Hi,

In addition to my last question, it would be important for me to compare 
the attributes values of two nodes of the same type.

Say I have two nodes of the type critical.
Every node has the attribute "high". I want to create a rule which has a 
match if the values of the two "high"-attributes do differ.
Is there any documentation on how Henshin calculates values of the 
"Value"-property and what it's features are?

Jens