DOCBOOK-APPS: broken links when importing autotoc.xsl intocustomization layer

[David Cramer <dcramer at broadjump dot com>]

Hi there,
When I customize a template in the docbook xsls, I copy the .xsl file
over from the distribution to the folder containing my customization
layer, modify the templates in the file, then import the modified file
into my driver. Then when I need to update, I can do a 3-way diff using
the unchanged .xsl from the current version as the common original and
merge my changes into the new version of that .xsl. I find this easier
to maintain than putting individual templates into my customization
layer and then trying to figure out if anything within it has changed
between versions. 

Generally, this works great. With autotoc.xsl, however, whenever I copy
it over to my customization layer folder and then import it, then use it
in chunked output, the links in the toc are broken: target filenames
fail to appear, only the anchor names do, as if it were a monolithic
html page. 

But if I then comment out the template:

<xsl:template name="href.target">
  <xsl:param name="object" select="."/>
  <xsl:text>#</xsl:text>
  <xsl:call-template name="object.id">
    <xsl:with-param name="object" select="$object"/>
  </xsl:call-template>
</xsl:template>

the links are no longer broken. Since the workaround is easy, it's not
really a problem for me, but I'm curious as to why it happens and
whether it's a bug or a feature ;-)

Thanks,
David