--- a/RelaxNG/publidoc.rng	lun. juin 20 18:39:46 2011 +0200
+++ b/RelaxNG/publidoc.rng	lun. juil. 18 19:10:28 2011 +0200
@@ -252,11 +252,43 @@
       <ref name="author.content"/>
     </element>
   </define>
+  <define name="author.attributes">
+    <optional>
+      <ref name="role.attribute"/>
+    </optional>
+  </define>
+  <define name="role.attribute">
+    <attribute name="role">
+      <choice>
+        <value>author</value>
+        <value>illustrator</value>
+      </choice>
+    </attribute>
+  </define>
   <define name="author.content">
     <optional>
       <ref name="firstname"/>
     </optional>
     <ref name="lastname"/>
+    <zeroOrMore>
+      <ref name="role"/>
+    </zeroOrMore>
+  </define>
+  <define name="role">
+    <element name="role">
+      <ref name="role.attributes"/>
+    </element>
+  </define>
+  <define name="role.attributes">
+    <ref name="role.of.attribute"/>
+  </define>
+  <define name="role.of.attribute">
+    <attribute name="of">
+      <choice>
+        <value>author</value>
+        <value>illustrator</value>
+      </choice>
+    </attribute>
   </define>
   <!-- ~~~~~~ publisher -->
   <define name="publisher">
@@ -343,12 +375,9 @@
   </define>
   <define name="pagenumber.value.attribute">
     <attribute name="value">
-      <ref name="pagenumber.value.enumeration"/>
+      <data type="positiveInteger"/>
     </attribute>
   </define>
-  <define name="pagenumber.value.enumeration">
-    <data type="positiveInteger"/>
-  </define>
   <!-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ subject ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -->
   <!-- ~~~~~~ subjectset -->
   <define name="subjectset">
@@ -971,15 +1000,12 @@
   </define>
   <define name="date.of.attribute">
     <attribute name="of">
-      <ref name="date.of.enumeration"/>
+      <choice>
+        <value>birth</value>
+        <value>death</value>
+      </choice>
     </attribute>
   </define>
-  <define name="date.of.enumeration">
-    <choice>
-      <value>birth</value>
-      <value>death</value>
-    </choice>
-  </define>
   <define name="date.content">
     <mixed>
       <zeroOrMore>
@@ -1001,18 +1027,15 @@
   </define>
   <define name="name.of.attribute">
     <attribute name="of">
-      <ref name="name.of.enumeration"/>
+      <choice>
+        <value>person</value>
+        <value>company</value>
+        <value>book</value>
+        <value>newspaper</value>
+        <value>party</value>
+      </choice>
     </attribute>
   </define>
-  <define name="name.of.enumeration">
-    <choice>
-      <value>person</value>
-      <value>company</value>
-      <value>book</value>
-      <value>newspaper</value>
-      <value>party</value>
-    </choice>
-  </define>
   <define name="name.content">
     <ref name="inlines"/>
   </define>