Return type of the xpath query during the compilation of xpath

[umeshc]

Hi ,
    I want to know is there any way in xalan xpath to come to know the
return type of the xpath query. I know that there is a way to determine
the return type of the  xpath query after evaluation but for my purpose
I want to know this return type at compilation time .
    If there is no way then can any one point to me how it can be done.

Thanks.
Regards,
Umesh