<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:fo="http://www.w3.org/1999/XSL/Format"
version="2.0">
<xsl:template match="/">
    <fo:root>
        <fo:layout-master-set>
            <fo:simple-page-master master-name="firstPage" page-height="297mm" page-width="210mm">
                <fo:region-body margin-top="25mm"/>
            </fo:simple-page-master>
        </fo:layout-master-set>
        <fo:page-sequence master-reference="firstPage">
            <fo:flow flow-name="xsl-region-body">
                <fo:block-container position="absolute">
                    <fo:block font-size="20pt" color="red">
                        blub </fo:block>
                </fo:block-container>
                <fo:block-container position="absolute">
                    <fo:block>
                        <fo:external-graphic src="file:///Users/gigo/Downloads/pdf-image/overlay.pdf"/>
                    </fo:block>
                </fo:block-container>
            </fo:flow>
        </fo:page-sequence>
    </fo:root>
</xsl:template>