Forum OpenACS Q&A: Re: Context bar and xowiki.
If you google for "instproc initialize" you find the generic http://openacs.org/api-doc/proc-view?proc=%3A%3Axo%3A%3APackageMgr+instproc+initialize
There is as well some info in the xowiki tutorial: http://alice.wu-wien.ac.at:8000/s5-xowiki-tutorial/slides
I am hoping to get to grips with oo programming from scratch using xotcl in advance of re-writing an internal message package I wrote for an earlier version of OpenACS.
It is the kind of application that would lend itself to an oo approach.