[Zope] Create zope property from external method?

I'm a zope newbie I have an external method in which I want to check whether a property within zope exists and if it doesn't exist to create it. How can I do this ? Andy -------------------------------------------------------------- Andy Heath, Senior Lecturer email: a.k.heath@shu.ac.uk o Sheffield Hallam University. Phone: +44 114 2534904 /\ Sheffield, England Fax: +44 114 2533161 () () --------------------------------------------------------------