[xsl] replacing tabs and the like in a string

Subject: [xsl] replacing tabs and the like in a string
From: Ihe Onwuka <ihe.onwuka@xxxxxxxxxxxxxx>
Date: Wed, 19 Sep 2012 12:04:10 +0100
I tried the obvious replace("abc def", &#x9;'\\t') (the space is a
tab)  and variations thereof (declaring a variable for the tab) and  I
get "The regular expression in replace() must not be one that matches
a zero-length string"

If you have a solution to hand I'd be grateful.

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