Bruce,
One way to hack this is to layer your parameter, using the second layer to
catch an exception if you have no value for the first:
<xsl:parameter name="runtime-value" select="false()"/>
<xsl:variable name="real-value">
<xsl:choose>
<xsl:when test="$runtime-value"/>
<xsl:value-of select="$runtime-value"/>
<xsl:when>
<xsl:otherwise>
<xsl:message>No runtime value for 'runtime-value' was supplied ...
providing default</xsl:message>
<xsl:text>default</xsl:text>
</xsl:otherwise>
</xsl:choose>
</xsl:variable>
...then use $real-value for all your processing.
It's somewhat cumbersome but it works well enough. It also lets you
intervene to test whether the value provided is recognized, etc.
I hope this helps,
Wendell
At 03:18 PM 10/18/2004, you wrote:
On Oct 18, 2004, at 8:43 AM, Michael Kay wrote:
That suggests there's another error present which is masking this one. Would
need to see more of the stylesheet to find it.
I condition a lot of the main ("mods:mods") templates on this parameter
value. So long as it's specified, the error goes away and everything runs
fine. I really just want a clear message to give to the user so they
don't get confused.
In any case, current archive is here if you have time to look (I'd love
feedback more generally from anyone out there, actually!), though there
are a lot of files there.
http://www.users.muohio.edu/darcusb/files/xbiblio.tar.gz
The parameter is specified in xsl/xhtml/xbiblio.xsl, and is used in files
like "xsl/xhtml/render-classes/author-year/biblio-out.xsl", in templates like:
<xsl:template match="mods:modsCollection[$citation-class='author-year']"
mode="bibliography">
Bruce
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