p.s. Can anyone think of any other use for this element?
I think another application is to set xsi:schemaLocation or xsi:type in
the result document, without triggering schema validation of the
stylesheet. The same argument also applies to xml:base and xml:space,
and to XInclude elements, though I can't say I've seen a great demand
for these features in result trees.
However, anything that you can do with xsl:namespace-alias can also be
achieved by avoiding literal result elements, and using xsl:element and
XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list