diff --git a/ws/Docbook/Preprocess/make.rules b/ws/Docbook/Preprocess/make.rules
index a5e26ad3f583d88bcd0584cd1576b18c7d225284..8838a01c1fcdcce67f883d71db4a1f5dae273a82 100644
--- a/ws/Docbook/Preprocess/make.rules
+++ b/ws/Docbook/Preprocess/make.rules
@@ -20,6 +20,8 @@ CMDID2TOPIC=java -cp .:/usr/share/hdm-docbook-xsl/Preprocess/id2topic-1.0.jar de
 
 # Common Docbook transformation parameter
 dbookXslCommonParam=\
+html.cleanup=1 \
+make.clean.html=1 \
 keep.relative.image.uris=0 \
 callout.graphics=0 \
 callout.unicode=1 \
@@ -46,13 +48,15 @@ base.dir=.
 
 # Webhelp related Docbook transformation parameter
 dbookXslWebhelpParam=${dbookXslCommonParam} \
+navig.graphics=0 \
+navig.graphics.path=OEBPS/images/ \
 generate.toc='appendix toc,title \
 article/appendix  nop \
 article   toc,title \
 book      toc,title,figure,table,example,equation \
-chapter   toc,title \
+/chapter   toc,title \
 appendix  toc,title \
-part      toc,title \
+/part      toc,title \
 preface   toc,title \
 reference toc,title \
 sect1     toc \
@@ -60,8 +64,8 @@ sect2     toc \
 sect3     toc \
 sect4     toc \
 sect5     toc \
-section   toc \
-set       toc,title' \
+/section   toc \
+/set       toc,title' \
 webhelp.base.dir=.
 
 # Required for docbook Xsl 1.0 based stylesheets