--- a/RelaxNG/publidoc.rng	mer. juil. 20 22:57:09 2011 +0200
+++ b/RelaxNG/publidoc.rng	mar. sept. 13 10:24:30 2011 +0200
@@ -200,6 +200,9 @@
       <zeroOrMore>
         <ref name="author"/>
       </zeroOrMore>
+      <optional>
+        <ref name="abstract"/>
+      </optional>
       <zeroOrMore>
         <ref name="annotation"/>
       </zeroOrMore>
@@ -216,6 +219,9 @@
       <optional>
         <ref name="language"/>
       </optional>
+      <optional>
+        <ref name="abstract"/>
+      </optional>
       <zeroOrMore>
         <ref name="annotation"/>
       </zeroOrMore>