[xsl] does variable contain a node-set or a string

Subject: [xsl] does variable contain a node-set or a string
From: "Moog, Thomas H" <thomas.h.moog@xxxxxxxxx>
Date: Fri, 9 May 2008 15:11:51 -0700
Using only standard functions (not exslt:object_type) is there a
way to tell if an xsl variable contains a node-set vs. a string ?

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