Hi, In an RNG 1.3 DITA environment, and I try to use the Oxygen refactoring tool to enable users to convert from one topic type to an other. For example, I want to convert <?xml version="1.0" encoding="UTF-8"?> <?xml-model href="*iam.rng*" type="application/xml" schematypens="http://relaxng.org/ns/structure/1.0" ?> *<iam* xmlns:ditaarch="http://dita.oasis-open.org/architecture/2005/" id="G19-3-5"> <title>19-3-5 ... To <?xml version="1.0" encoding="UTF-8"?> <?xml-model href="*patientsSous.rng*" type="application/xml" schematypens="http://relaxng.org/ns/structure/1.0" ?> *<patientsSous* xmlns:ditaarch="http://dita.oasis-open.org/architecture/2005/" id="G19-3-5"> <title>19-3-5 ... I've no problem to transform XML elements using a refactoring XSLT stylesheet but this does not affects the top front PI. My stylesheet : *At document level, I remove any previous PI* <xsl:template match="/"> <xsl:apply-templates select="*"/> </xsl:template> *At top root element, I generate the new**PI before contents* <xsl:template match="/*"> <xsl:processing-instruction name="xml-model"> href="patientsSous.rng" type="application/xml" schematypens="http://relaxng.org/ns/structure/1.0"</xsl:processing-instruction> <patientsSous > <xsl:apply-templates select="node() | @*"/> </patientsSous> </xsl:template> So, it is likely if using the refactoring tool, the stylesheet is applied only to root element, not the PI in front of the root element. Is it really the case ? A bug ? Anyone knows how to also modify the top front PI ? Regards, Pierre