--- a/RelaxNG/publidoc.rnc	jeu. sept. 13 12:47:35 2012 +0200
+++ b/RelaxNG/publidoc.rnc	lun. sept. 17 11:58:28 2012 +0200
@@ -476,7 +476,7 @@
 
 pagenumber.content = xsd:positiveInteger
 
-# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ keyword & subject ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+# ~~~~~~~~~~~~~~~~~~~~~~~~~~~ keyword & subject ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 # ~~~~~~ keywordset
 keywordset = element keywordset { keywordset.content }
@@ -494,11 +494,9 @@
 subjectset.content = subject+
 
 # ~~~~~~ subject
-subject = element subject { subject.attributes }
+subject = element subject { subject.content }
 
-subject.attributes =
-   subject.id.attribute
-subject.id.attribute = attribute id { xsd:NMTOKEN }
+subject.content = xsd:NMTOKEN
 
 # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ abstract ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~