xmlns+JScript+XSLT-Doubt, please claify

Hi all,

I have a coding here.
XSL FILE:

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Package Name:

My aim is to pass the value of $var1 to the function-my function and manipulate that value in a script code. The value passed to the function is something like a.b.c.d.e and i have to change it as a.b.c.d (ie remove the last word after last . to get the package name of a java class name).

My doubt is-what is the datatype of the value passed to the function. if its string how to manipulate it and by using what function(any built it). I doubt if its a string, if its not then how to change it to a string and make changes to it.

bye,
with regards,
Deepak.

Here is a small part of the xml file

D:\deepak\buildProcess_2\logging\build\class
D:\deepak\buildProcess_2\logging\build\src

dcx.sysman.logging.SMIEntityBeanLogger