Make a pattern for set components

diff --git a/docbook/relaxng/docbook/src/hier.rnc b/docbook/relaxng/docbook/src/hier.rnc
index a90f574a563e36b06ca5b28abbcc5393ca9f35a6..f96c719a466c5b6bf4b0ea55da7bd20d48a5dec2 100644 (file)
--- a/docbook/relaxng/docbook/src/hier.rnc
+++ b/docbook/relaxng/docbook/src/hier.rnc
@@ -94,6 +94,8 @@ db.component.contentmodel =
 db.setindex.components = notAllowed
 db.toc.components = notAllowed
 
+db.set.components = db.set | db.book
+
 # ======================================================================
 
 [
@@ -120,7 +122,7 @@ div {
          db.set.attlist,
          db.set.info,
          db.toc.components?,
-         (db.set|db.book)+,
+         db.set.components+,
          db.setindex.components?
       }
 }