Setting fonts and size for whole document

I did some tests with XMLMIND Formatting Converter and there I could use a
<fo:wrapper> tag to set the fonts and fontsize for the whole document. The
fo:wrapper function does not work in JFOR.

I also tried someting with linebreaks in a fo:block, but only "line 1" has
the correct properties of the font type and siz.

 <fo:block font-family="Arial"  font-size="20pt">
   line 1<fo:block/>
   line 2<fo:block/>
   line 3
 </fo:block>

Is it possible with JFOR to set font type and size as a default for the
whole document?

Thanks
Hanno