How to generate a macro for output values?

Hi,

I would like to generate a general macro which extracts the output (attribute values) independent of the model. Because dependent on the selected model,each output has a different attribute name. Therefore it makes no sense to generate a macro with the "attribute name" of the output.

However, I have no idea how to create such a macro. Can anybody help? Or is there already an Operator with such a function?

Thank you!