changing value of select in xsl:for-each

hello,

I have not yet been able to solve my problem. i would like to change the value of my select attribute in my xsl:for-each loop written in my first stylesheet when this first stylesheet is being used by another second stylesheet to change the controls. is this possible. i want to change because my first stylesheet is interacting with an xml from which the data is coming, but my second stylesheet is not interacting with that xml. i am using a variable to assign the source of that xml being used in first stylesheet so that it can be used where necessary in my second stylesheet but do not know how to change that in my xsl:for-each select="";

as of now i have

<xsl:for-each select="Exam/Question">

in my first stylesheet.

this i would like to change to 

<xsl:for-each select="$srcxml//Question">

in my second stylesheet as i am using

<xsl:variable name="srcxml" select="document('Exam.xml')"/>

please suggest some idea or change. i am stuck with this and am not able to proceed.  actually it would be great if i can tell my second stylesheet that it has to use everywhere Exam.xml as the source whenever it encounters any xpath statement. but am not sure how totell it. please advise

with regards,
prasad akella
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