--- a/RelaxNG/publiquiz.rnc	lun. oct. 27 18:01:33 2014 +0100
+++ b/RelaxNG/publiquiz.rnc	ven. oct. 31 10:33:36 2014 +0100
@@ -44,7 +44,7 @@
 
 top.quiz.content =
    top.head?,
-   instructions,
+   instructions?,
    (engine | composite),
    help?,
    answer?