hello, you can produce any XML you like with many XML modules on CPAN (just do not take XML::Simple). My fovourite is XML::Twig which has his own site with extra docs and examples.

L*
Update: some reads: http://damien.krotkine.com/2009/11/25/perl-tests-in-hudson-via-junit.html and http://blogs.perl.org/users/confuseacat/2011/09/perl-testing-with-jenkinshudson-avoiding-some-pitfalls.html