How to use parameter in the xpath of an Association Radiobutton List

I use a dataview to display a certain question (entity 1) and one cell I want to use the Association Radio Button List to select one of the associated answers (entity 2), but instead of only showing the associated entity, all entities of type 2 are shown. I want to use an Xpath contrain to show only the association, but it does not allow the any parameter name $question. How can I only show the associated answers?
1 answers

You can create a constraint based on the data view object using the currentobject token, like so:

[Entity1_Entity2 = '[%CurrentObject%]']

See also the manual page on Keywords for more info.