Re: top level params and xsl:attribute magic?

It should be possible to implement this technique for any XSLT
processor, given the specific API it uses. What is necessary is:

1. to be able to invoke a method that evaluates an XPath expression to
return the "xsl:param" element,

2. then use the setAttribute() method on this element to dynamically
hardwire its value.

3. Only then invoke the xslt transformation.

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