Попробуйте преобразовать его следующим образом: XSL :
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" indent="no"/>
<xsl:template match="/|comment()|processing-instruction()">
<xsl:copy>
<xsl:apply-templates/>
</xsl:copy>
</xsl:template>
<xsl:template match="*">
<xsl:element name="{local-name()}">
<xsl:apply-templates select="@*|node()"/>
</xsl:element>
</xsl:template>
<xsl:template match="@*">
<xsl:attribute name="{local-name()}">
<xsl:value-of select="."/>
</xsl:attribute>
</xsl:template>
</xsl:stylesheet>
Transformer xformer = TransformerFactory.newInstance().newTransformer(new StreamSource(new FileInputStream("xform.xsl")));
StringWriter writer = new StringWriter();
xformer.transform(new StreamSource(new FileInputStream("input.xml")), new StreamResult(writer));
System.out.println(writer.toString());