Make speakernotes/handoutnotes optional as many presentations do not use them

diff --git a/xsl/slides/schema/relaxng/slides.rnc b/xsl/slides/schema/relaxng/slides.rnc
index 4d37f6f710cede99610b60ff91f8e5dadcc997e1..4297410b9c8c6d36561c1369fa100c1df5f4d239 100644 (file)
--- a/xsl/slides/schema/relaxng/slides.rnc
+++ b/xsl/slides/schema/relaxng/slides.rnc
@@ -55,8 +55,8 @@ include "../../../../docbook/relaxng/docbook/docbook/docbook.rnc" inherit = db {
 dbs._any.attribute = attribute * { text }
 
 dbs.all.content = db.all.blocks? &
-  dbs.speakernotes &
-  dbs.handoutnotes &
+  dbs.speakernotes? &
+  dbs.handoutnotes? &
   db._any.svg? &
   db._any.mml? &
   dbs.block?