2004-04-19  Matthias Clasen  <mclasen@redhat.com>

	* Makefile.am: Add version-greater-or-equal.xsl.

	* version-greater-or-equal.xsl: New file, implementing
	the version-greater-or-equal template for comparing version
	numbers.

	* gtk-doc.xsl: Import version-greater-or-equal.xsl and
	use the version-greater-or-equal template to a) check that
	the xsl stylesheets are not too old and b) to avoid creating
	multiple indices if the xsl stylesheets don't support filtered
	indices.  (#107774)

	* gtkdoc-mkdb.in (MakeIndexterms): Emit role attributes
	on indexterms which can be used to create filtered indices
	with sufficiently new xsl stylesheets. The required functionality
	will appear in version 1.62 of the xsl stylesheets.  (#115530)