--- a/RelaxNG/publidoc.rnc	dim. nov. 17 15:19:01 2013 +0100
+++ b/RelaxNG/publidoc.rnc	lun. nov. 18 09:46:32 2013 +0100
@@ -583,6 +583,7 @@
 contributor = element contributor { contributor.content }
 
 contributor.content =
+   identifier.uri?,
    (((firstname, secondname?)?, lastname) | label),
    address?,
    link?,