[mod_python] FieldStorage class

Hello,

During playing with util.FieldStorage classes I found that when form data
is loaded with POST method, Request object has already has 'data' member
that is loaded with form variables, even without creating intance of
FieldStorage. I tried to search manual about this, but failed. 

Is this member is safe to use in my code? Will this be supported in future
versions?

Thanks in advance.

Suhku Huh