--- a/RelaxNG/publiset.rnc	jeu. juil. 18 09:06:34 2013 +0200
+++ b/RelaxNG/publiset.rnc	lun. juil. 22 15:48:20 2013 +0200
@@ -248,7 +248,7 @@
 # ~~~~~~ subject
 subject = element subject { subject.content }
 
-subject.content = xsd:NMTOKEN
+subject.content = mixed { sup*, sub* }
 
 # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ abstract ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~