make <parentdocument> legal

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@97490 13f79535-47bb-0310-9956-ffa450edef68

diff --git a/docs/manual/style/manualpage.dtd b/docs/manual/style/manualpage.dtd
index ff105cbda8a6f7d4302ca64ddc4c2034b407ab59..2bdb498e7a4630a8034a14fedfd76209032df741 100644 (file)
--- a/docs/manual/style/manualpage.dtd
+++ b/docs/manual/style/manualpage.dtd
@@ -4,9 +4,13 @@
 %common;
 
 <!-- <manualpage> is the root element -->
-<!ELEMENT manualpage (relativepath, title, summary?, seealso*, section*)>
+<!ELEMENT manualpage (relativepath, parentdocument?, title, summary?,
+seealso*, section*)>
 
 <!-- The path to the root of the documentation from the current doc -->
 <!ELEMENT relativepath EMPTY>
 <!ATTLIST relativepath href CDATA #REQUIRED >
 
+<!-- The path and title of the parent document -->
+<!ELEMENT parentdocument (#PCDATA)>
+<!ATTLIST parentdocument href CDATA #REQUIRED >