+ <!ENTITY % entities SYSTEM "common/common.ent">
+ <!-- Next line allows imagedata/@format="PDF" and is taken from
+http://lists.oasis-open.org/archives/docbook/200303/msg00163.html
+ -->
+ <!ENTITY % local.notation.class "| PDF">
+ <!-- Next line is necessary for some XML parsers, for reasons I
+ don't understand. I got this from
+http://lists.oasis-open.org/archives/docbook/200303/msg00180.html
+ -->
+ <!NOTATION PDF SYSTEM "PDF">
+ %entities;