What do people think is the "best" way of specifying the
default value for
the parameters:
<xsl:param name="contentRTF"></xsl:param>
which gives a RTF containing nothing
No: if there is no content and no select attribute, the value is a
zero-length string. You can get an RTF consisting of a document node with no
children by writing, for example
<xsl:param name="contentRTF"><xsl:fallback/></xsl:param>
<xsl:param name="contentRTF" select="" />
which gives an empty nodeset (or something),
No, that's an error: the select attribute must be an XPath expression, and
this isn't
or even
<xsl:param name="contentRTF select="''" />
which gives an empty string.
I appreciate that, for all practical purposes, I should get the same
output from all of them, but was wondering which might be seen as the
canonical way of doing it, given that any *passed* value will
always be a
result tree fragment. Must have my strong-typing head on today :-)
I agree that logically, a document node with no children makes the most
sense. In 2.0, the cleanest way of constructing this is
<xsl:param name="x" as="document-node()">
<xsl:document/>
</xsl:param>
Michael Kay
http://www.saxonica.com/
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