diff --git a/src/documentation/xdocs/hpsf/book.xml b/src/documentation/xdocs/hpsf/book.xml
index 027d430e4..2b5cad7d5 100644
--- a/src/documentation/xdocs/hpsf/book.xml
+++ b/src/documentation/xdocs/hpsf/book.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0"?>
 <!DOCTYPE book PUBLIC "-//APACHE//DTD Cocoon Documentation Book V1.0//EN" "../dtd/book-cocoon-v10.dtd">
-
+<!-- $Id$ -->
 <book software="POI Project" 
       title="HPSF" 
       copyright="@year@ POI Project">
diff --git a/src/documentation/xdocs/hpsf/how-to.xml b/src/documentation/xdocs/hpsf/how-to.xml
index 4fa55b474..d0078d9db 100644
--- a/src/documentation/xdocs/hpsf/how-to.xml
+++ b/src/documentation/xdocs/hpsf/how-to.xml
@@ -1,5 +1,8 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE document PUBLIC "-//APACHE//DTD Documentation V1.0//EN" "../dtd/document-v10.dtd"> 
+<!DOCTYPE document PUBLIC "-//APACHE//DTD Documentation V1.0//EN"
+"../dtd/document-v10.dtd">
+<!-- $Id$ -->
+
 <document>
  <header>
   <title>HPSF HOW-TO</title>
diff --git a/src/documentation/xdocs/hpsf/index.xml b/src/documentation/xdocs/hpsf/index.xml
index 9402cf0ea..2dadddb36 100644
--- a/src/documentation/xdocs/hpsf/index.xml
+++ b/src/documentation/xdocs/hpsf/index.xml
@@ -1,5 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE document PUBLIC "-//APACHE//DTD Documentation V1.0//EN" "../dtd/document-v10.dtd">
+<!-- $Id$ -->
+
 <document>
  <header>
   <title>HPSF (Horrible Property Set Format)</title>
diff --git a/src/documentation/xdocs/hpsf/internals.xml b/src/documentation/xdocs/hpsf/internals.xml
index 615dec31a..458012d27 100644
--- a/src/documentation/xdocs/hpsf/internals.xml
+++ b/src/documentation/xdocs/hpsf/internals.xml
@@ -1,5 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE document PUBLIC "-//APACHE//DTD Documentation V1.0//EN" "../dtd/document-v10.dtd">
+<!-- $Id$ -->
+
 <document>
   <header>
     <title>HPSF Internals: The Horrible Property Set Format</title>
diff --git a/src/documentation/xdocs/hpsf/todo.xml b/src/documentation/xdocs/hpsf/todo.xml
index 1c8708b1f..f3f89f97e 100644
--- a/src/documentation/xdocs/hpsf/todo.xml
+++ b/src/documentation/xdocs/hpsf/todo.xml
@@ -1,5 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE document PUBLIC "-//APACHE//DTD Documentation V1.0//EN" "../dtd/document-v10.dtd">
+<!-- $Id$ -->
+
 <document>
  <header>
   <title>To Do</title>