[xsl] Transforming an XML structure into a string

*bang* *bang* *bang* goes my head against the desk.

We are passing a fragment of XML into a template as a param.

In this case the XML fragments look something like : <call 
function="analogous">base_colour=<value 
target_id="base_colour"/>,choice=1</call>
We are aiming to store this string in the value attribute of a html 
hidden input form so we would like to map all angular brackets to their 
&lt; &gt; equivalents, and & to &amp; etc.
String functions like translate or substring work on the text node parts 
(like "base_colour=" and "choice=1") but do not process the nodes like 
<call or <value.
Can we do a "toString" on this XML fragment or are we approaching this 
the wrong way around...
Many thanks for you time,

B&A




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