Where is the defult psml?

[zy]

    I want to know ,when I registe a new accont ,where do the defult psml file come 
from ?
I know there is a defult.psml  in 
"Tomcat_home\webapps\jetspeed\WEB-INF\psml\user\myname\html\default.psml".
But where do it come from? 
    I suppose there must be a defult psml template to create new user's defult psml. 
But I can not find it.
Please help me ! 
3X :)