diff --git a/manual/xml/signal_flow.xml b/manual/xml/signal_flow.xml
new file mode 100644
index 0000000000..b5a4b9e935
--- /dev/null
+++ b/manual/xml/signal_flow.xml
@@ -0,0 +1,21 @@
+<?xml version="1.0" standalone="no"?>
+
+<!DOCTYPE section PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN" "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [
+
+<!ENTITY % BOOK_ENTITIES SYSTEM "./entities.ent">
+%BOOK_ENTITIES;
+
+]>
+
+<section id="sn-signal-flow">
+  <title>Signal Flow</title>
+  <mediaobject>
+    <imageobject>
+      <imagedata fileref="images/signal_flow.png"/>
+    </imageobject>
+  </mediaobject>
+<!--
+	<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" 
+		href="Some_Subsection.xml" />
+	-->
+</section>
diff --git a/manual/xml/tracks_and_busses.xml b/manual/xml/tracks_and_busses.xml
index dd101ce545..fb331a2699 100644
--- a/manual/xml/tracks_and_busses.xml
+++ b/manual/xml/tracks_and_busses.xml
@@ -11,11 +11,9 @@
     most important objects in Ardour. They represent the fundamental way to
     playback and record audio, MIDI, and image data.
   </para>
-  <mediaobject>
-    <imageobject>
-      <imagedata fileref="images/signal_flow.png"/>
-    </imageobject>
-  </mediaobject>
+
+  <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" 
+		href="signal_flow.xml" />
   <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" 
 		href="adding_tracks.xml" />
   <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"