[xsl] svg dotted rect ?

[Herwig Posedu <herwig.posedu@xxxxxxxxxx>]

hi everybody!
i need to view dotted rectangles in my pdf, which i generate over fop 
with a xslt
i have made it with a svg-graphic like this:
<fo:instream-foreign-object>
   <svg:svg width="6mm" height="5mm">
    <svg:rect x="1mm" y="0mm" width="3mm" height="3mm" 
style="fill:none; stroke:black; stroke-width:0.2; 
stroke-dasharray:1,1,1"/>                                                
    </svg:svg>
</fo:instream-foreign-object>

it looks like dotted, but in fact it isn't, there are short lines and 
unfortunatly no dotts.

has anybody an idea, how i can make may rectangle real dotted with 
"dots" and not with "short lines"

thx for helping

herwig