mapservObj.MapPnt and general documention of mapservObj

[pw]

Hello,

What values are expected in mapservObj.MapPnt,
are these coordinates in the units of the maps projection or
are they meant to be map image coordinates?

Secondly, where do I find documentation for all mapserver
objects and structures. I'm not sure I have the correct wiki
(http://mapserver.gis.umn.edu/docs)  and  "fgrep -R <object> * | less" 
is getting a bit tedious. This particular wiki is pretty disorganized.

Thanks for your help

Peter