I added a custom attribute in the token table.
I made a hidden question of type 'equation', and in the field login - equation: I typed:
TOKEN:ATTRIBUTE_1
This stored the text 'TOKEN:ATTRIBUTE_1' in the response table.
I tried also with {TOKEN:ATTRIBUTE_1}, but then the field was empty.
I also tried with ={TOKEN:ATTRIBUTE_1}, then the field contained the character =
So what is the correct syntax to save that attribute in my response table?