+26 December 2005 (version 0.11.4)
+ * Added link.attributes and the optional "series" attribute to
+ "bookref", and fleshed out the "bookref" and "footref"
+ descriptions.
+
+5 December 2005 (version 0.11.3)
+ * Corrected ATTLISTs of character elements
+ * Added "ch.apos", "ch.frac116", and "ch.plus" elements
+