--- a/RelaxNG/publidoc.rnc	mer. juil. 13 11:38:28 2016 +0200
+++ b/RelaxNG/publidoc.rnc	mer. juil. 13 15:25:02 2016 +0200
@@ -395,7 +395,7 @@
 
 glossary.entry.content =
    mainterm,
-   alt-terms,
+   alt-terms?,
    media?,
    meanings+,
    seealso*