<?Surf version="1.0" encoding="utf-8"?>
<fo:root Surfns:fo="http://www.w3.org/1999/XSL/Format">
 <fo:layout-master-set>
 <fo:simple-page-master page-height="11in" page-width="8.5in" margin-left="1.0in" margin-top="0.2in" margin-bottom="1.0in" margin-right="1.0in" master-name="test-page-master">
 <fo:region-body margin-left="1.0in" margin-top="0.2in" margin-right="1.0in" margin-bottom="1.0in"/>
 </fo:simple-page-master>
 </fo:layout-master-set>
 <fo:page-sequence master-name="test-page-master">
 <fo:flow flow-name="xsl-region-body">
 <fo:block background-color="aqua"> <fo:external-graphic src="nist.gif" content-height="50%"/>The "content-height" of this "external-graphic" is set to "50%"</fo:block>
 </fo:flow>
 </fo:page-sequence>
</fo:root>