The function position() (you don't need to put "fn:" in front of it) >returns
the position of the context node. The context changes within >the XPath
expression to each node it is evaluating.
Haha, right, the context item changes when evaluating the sequence. Super. :P
Thanks!
Tworks:
<!-- ...setting some params for error checking and complaining. -->
<wt:param name="missingParamNames">
<wt:for-each select="
if ($do = ('change', 'remove')) then
$fileName
else if ($do = 'add') then
($fileName, $title, $type, $smellsLike)
else
()
">
<!-- ================== Yay! ==================== -->
<wt:variable name="position" select="wf:position()"/>
<wt:sequence select="
if (. = '') then
$necessaryParamNames[$position]
else
()
"/>
</wt:for-each>
</wt:param>
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