[xsl] How to detect if the context item exists

Subject: [xsl] How to detect if the context item exists
From: stf@xxxxxxxx
Date: Thu, 30 Jun 2011 19:33:47 +0200 (CEST)
Hello,

I need to detect inside a named template if the context item is defined,
but exists(.) and (. castable as xs:anyType) fail, because, you know,
the context item is not defined. Any suggestions?

Thanks,

Stefan

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