If nodeset does NOT include

I want to call a template only if a nodeset does 
not contain a match for a variable, ie:

<xsl:if test="(.//InqInfo/Member_Id != $listfor)">
                          <xsl:call-template 
name="Recipbutton">

where != should mean "does not include"
I know it's a stupid question, but I can't see a 
simple, straightforward way to do this.

TIA Thomas Hartung
Web Developer/Help Desk
612/341-9621
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