--- a/RelaxNG/publidoc.rnc	dim. juin 12 19:35:31 2011 +0200
+++ b/RelaxNG/publidoc.rnc	lun. juin 13 18:55:59 2011 +0200
@@ -372,6 +372,7 @@
 media = element media { media.content }
 
 media.content =
+   block.head?,
    image+,
    caption?