Adding namespace using xslt2.0 - xslt

Question

There's a lot of references in the internet that has the same problem with me. It is the adding of namespace, I have the same as this one that I saw: Adding namespace in inner parent group in xslt v2.0. But in my case, I don't have a namespace in the parent tag and insert the namespace in the inner level group. I tried to copied the solutions but I can't get the expected output. For example, I have this sample file,
INPUT:
<Record>
<Data>
<Section>
<ID>111222</ID>
</Section>
</Data>
</Record>
EXPECTED:
<Record>
<Data>
<Section xmlns="www.hdgd.co">
<ID>111222</ID>
</Section>
</Data>
</Record>
XSLT:
<xsl:stylesheet version="2.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" version="1.0" encoding="UTF-8" indent="yes"/>
<xsl:strip-space elements="*"/>
<xsl:template match="*">
<xsl:element name="{local-name()}">
<xsl:apply-templates/>
</xsl:element>
</xsl:template>
<xsl:template match="Section">
<Section xmlns="www.hdgd.co">
<xsl:copy-of select="*"/>
</Section>
</xsl:template>
The generated output populated an empty namespace in the ID element. And, I need to remove that empty xmlns. Look like this:
<Record>
<Data>
<Section xmlns="www.hdgd.co">
<ID xmlns="">111222</ID>
</Section>
</Data>
</Record>

Answer 1

You cannot use:
<xsl:copy-of select="*"/>
because that copies the child nodes in their original namespace - which is no-namespace. To get the result you want, you must move not only Section to the new namespace, but also all its descendants (and leave all other nodes as they are) - for example:
XSLT 1.0
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" version="1.0" encoding="UTF-8" indent="yes"/>
<xsl:strip-space elements="*"/>
<!-- identity transform -->
<xsl:template match="#*|node()">
<xsl:copy>
<xsl:apply-templates select="#*|node()"/>
</xsl:copy>
</xsl:template>
<xsl:template match="*[ancestor-or-self::Section]">
<xsl:element name="{name()}" namespace="www.hdgd.co">
<xsl:apply-templates/>
</xsl:element>
</xsl:template>
</xsl:stylesheet>