How to Pass BPEL Variable(String Variable) into XSLT in SOA

In BPEL:

<from expression="ora:doXSLTransformForDoc('xsl/Xform_ResourceEBM_to_ResourceRequestABM.xsl', $ResourceReqMsg.ResourceEBM,'counter',$PCounter)"/>

In XSLT:

   <xsl:param name="counter"/>
   <xsl:template match="/">---> Add the parameter just above the template