Journal of Systems and Software http://www.elsevier.nl/locate/jss On line at: http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5651&_auth=y&_acct=C000040419&_version=1&_urlVersion=0&_userid=723079&md5=63acec98caf822cf372ddaedcc948640 ---- CategoryJournal