DOCBOOK-APPS: Indenting paragraphs for PDF output, XSL customisation

I would like to indent paragraphs for PDF output 
like this:

 

    para 1 blah blah 
blah

blah blah blah blah blah

blah blah blah blah blah

    para 2 blah blah 
blah

blah blah blah blah blah

blah blah blah blah blah

 

So that vertical space is preserved, I know how 
to  do the

actual vertical spacing:

 

<xsl:attribute-set 
name="normal.para.spacing">
   <xsl:attribute 
name="space-before.optimum">0.1cm</xsl:attribute>
   
<xsl:attribute 
name="space-before.minimum">0.1cm</xsl:attribute>
   
<xsl:attribute 
name="space-before.maximum">0.1cm</xsl:attribute>
</xsl:attribute-set>

 

but how do I do the indentation?

 

Regards

 

AM