--- a/RelaxNG/publidoc.rnc	mer. juil. 20 15:05:37 2011 +0200
+++ b/RelaxNG/publidoc.rnc	mer. juil. 20 22:57:09 2011 +0200
@@ -47,6 +47,7 @@
    top.head?,
    section+
 
+
 # =============================================================================
 #                                 HEAD LEVEL
 # =============================================================================
@@ -69,6 +70,7 @@
  & date?
  & place?
  & source*
+ & keywordset?
  & subjectset?
  & abstract?
  & cover?
@@ -196,7 +198,17 @@
    pagenumber.value.attribute
 pagenumber.value.attribute = attribute value { xsd:positiveInteger }
 
-# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ subject ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ keyword & subject ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+# ~~~~~~ keywordset
+keywordset = element keywordset { keywordset.content }
+
+keywordset.content = keyword+
+
+# ~~~~~~ keyword
+keyword = element keyword { keyword.content }
+
+keyword.content = text
 
 # ~~~~~~ subjectset
 subjectset = element subjectset { subjectset.content }