Arguably, I don't think this (parsing XML) is something Tasker should
tackle. It might be more sane to use Tasker to grab the xml file with
http-get, then call an ASE script to process the file. Parsing XML is
trivial with Perl (though I don't know... is CPAN available with the
ASE Perl interpreter?) and I can only imagine it's pretty well
supported in Python as well. I don't think Pent needs to implement the
Tasker Programming Language. The TODO list is big enough already. =]