How to generate list of tables from DocBook article??

[Stefan Dalibor <Stefan.Dalibor@informatik.uni-erlangen.de>]

I'm formatting a DocBook article to HTML and PDF, using xsltproc
(libxml 20604, libsxlt 10102, libexslt 802) and fop 0.20.5 with
the Docbook XML DTD 4.2 and the Docbook XSL stylesheets 1.65 under
Cygwin.

Generally this works fine, but though I have set

<xsl:param name="generate.toc">article toc,table</xsl:param>

in my customization layer, I can't generate a list of tables.

If I convert the input document to a Docbook book, the lot is generated;
likewise, I can supress the toc generation if I remove `toc' from the
generate.toc parameter.
What do I have to do to get a lot in an article?

Thanks!

Stefan