writing out attribute value for xml:lang tag

Hi,

When translating an XML document into another, how do I write out
attribute values for a xml:lang tag? E. g. if I have something like

<String xml:lang="en">This is a string</String>

and I need to use the xml:lang value (in this case, it's 'en'), how can
I use it in my xsl file?

<xsl:variable name="isolang"><xsl:value-of
select="String/@xml:lang"/></xsl:variable>

does not seem to work ...

Your help is greatly appreciated!

Thanks,
Matt
-- 

Matthias O. Will (m.o.will@xxxxxx)                       <>< 
Institute of Computer Science,       University of Freiburg
Georges-Koehler-Allee, Bldg. 51, D-79110 Freiburg,  Germany	 
Phone:   +49-761-203-8170             Fax: +49-761-203-8162  
URL:     http://ad.informatik.uni-freiburg.de/~will


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