diff --git a/Doc/Makefile b/Doc/Makefile
index 86a6a96bc84b87c1e28eadcc1fbc4d57c99414e4..97078966517a4dcdb51dee7833e384a8dd666328 100644
--- a/Doc/Makefile
+++ b/Doc/Makefile
@@ -7,18 +7,14 @@ SCRIPTBASENAME=lectures
 # http://docbook.sourceforge.net/release/xsl/current/doc/param.html
 #
 
-XSLPARAM=-p callout.graphics 0 \
--p callout.unicode 1
-
-XSLPARAM_pdf=-p xep.extensions 1\
- -p highlight.source 1 
-
 DOCMODULES=Sd1 Sda1 Sda2 Sdi Persist
 
 BUILDROOT=target
 
 #+++ no changes below this line ++++++++++++++++++++++++++++++++++++
 
+include make.xsl
+
 numCores=$(shell nproc --all)
 
 SAXONCMD=java -cp "/usr/share/java/Saxon-HE.jar:/usr/share/java/xercesImpl.jar" \
diff --git a/Doc/make.xsl b/Doc/make.xsl
new file mode 100644
index 0000000000000000000000000000000000000000..8e28202d4b72ef9612fbd08b323fb6df1163d545
--- /dev/null
+++ b/Doc/make.xsl
@@ -0,0 +1,29 @@
+XSLPARAM=\
+ -p callout.graphics 0\
+ -p callout.unicode 1\
+ -p generate.toc 'appendix  toc,title\
+ article/appendix  nop\
+ article   toc,title\
+ book      toc,title,figure,table,example,equation\
+ chapter   toc,title\
+ part      toc,title\
+ preface   toc,title\
+ reference toc,title\
+ sect1     toc\
+ sect2     toc\
+ sect3     toc\
+ sect4     toc\
+ sect5     toc\
+ section   toc\
+ set       toc,title' \
+ -p graphicsize.use.img.src.path 0\
+ -p highlight.source 1\
+ -p id.warnings 1\
+ -p olink.debug 1\
+ -p ulink.target _blank\
+ -p use.id.as.filename 1
+
+XSLPARAM_pdf=\
+ -p xep.extensions 1\
+ -p highlight.source 1
+
diff --git a/ws/Docbook/Extensions/Tdata/Makefile b/ws/Docbook/Extensions/Tdata/Makefile
index 79453f12376784dd272d53d0cee368f2a879b2db..4fc09edc49503a71e344ef05112351bfa5ef3f67 100644
--- a/ws/Docbook/Extensions/Tdata/Makefile
+++ b/ws/Docbook/Extensions/Tdata/Makefile
@@ -7,34 +7,7 @@ SCRIPTBASENAME=fig
 # http://docbook.sourceforge.net/release/xsl/current/doc/param.html
 #
 
-XSLPARAM=\
- -p callout.graphics 0\
- -p callout.unicode 1\
- -p generate.toc 'appendix  toc,title\
- article/appendix  nop\
- article   toc,title\
- book      toc,title,figure,table,example,equation\
- chapter   toc,title\
- part      toc,title\
- preface   toc,title\
- reference toc,title\
- sect1     toc\
- sect2     toc\
- sect3     toc\
- sect4     toc\
- sect5     toc\
- section   toc\
- set       toc,title' \
- -p graphicsize.use.img.src.path 0\
- -p highlight.source 1\
- -p id.warnings 1\
- -p olink.debug 1\
- -p ulink.target _blank\
- -p use.id.as.filename 1
-
-XSLPARAM_pdf=\
- -p xep.extensions 1\
- -p highlight.source 1 
+include ../../../../Doc/make.xsl
 
 BUILDROOT=target