The XSLT toolchain requires an empty <index> element where the index is
supposed to appear. Add that with conditionals to hide it from the
DSSSL build.
# if we try to do "make all" in a VPATH build without the explicit
# $(srcdir) on the postgres.sgml dependency in this rule. gmake bug?
postgres.xml: $(srcdir)/postgres.sgml $(ALMOSTALLSGML)
- $(OSX) -D. -x lower $< >postgres.xmltmp
+ $(OSX) -D. -x lower -i include-xslt-index $< >postgres.xmltmp
$(PERL) -p -e 's/\[(aacute|acirc|aelig|agrave|amp|aring|atilde|auml|bull|copy|eacute|egrave|gt|iacute|lt|mdash|nbsp|ntilde|oacute|ocirc|oslash|ouml|pi|quot|scaron|uuml) *\]/\&\1;/gi;' \
-e '$$_ .= qq{<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">\n} if $$. == 1;' \
<postgres.xmltmp > $@
to include it.
-->
<!ENTITY % include-index "IGNORE">
+
+<!--
+ Create empty index element for processing by XSLT stylesheet.
+ -->
+<!ENTITY % include-xslt-index "IGNORE">
&biblio;
<![%include-index;[&bookindex;]]>
+ <![%include-xslt-index;[<index></index>]]>
</book>