xml example

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How can you make this xml doc work in firefox2 ?<?xml version="1.0" encoding="ISO-8859-1"?>

<header>
XML
</header>

<paragraph>
blablablablabla
</paragraph>

<xsl:transform xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<fo:root xmlns:fo="http://www.w3.org/1999/XSL/Format">

<xsl:template match="header">
<fo:block
font-size="14pt" font-family="verdana" color="red"
space-before="5mm" space-after="5mm">
<xsl:apply-templates/>
</fo:block>
</xsl:template>

<xsl:template match="paragraph">
<fo:block
text-indent="5mm"
font-family="verdana" font-size="12pt"
space-before="5mm" space-after="5mm">
<xsl:apply-templates/>
</fo:block>
</xsl:template>

</fo:root>
</xsl:transform> I am guessing by using xhtml but maybe somebody know some other things i dont know what is usaly the case around here