you can do this now, this screenshot is an example how:
do an xpath query in JS. set the string results as variables using
fake.set(), and then save the variable results to a file using a "run
unix script" action.
the only real hickup here is that as of 0.4.2, Fake requires variables
set thru fake.set() to be strings. I think i will try to fix that to
be more lenient in 0.5