Remove xsi:type using xslt - xslt

Question

I have following XML. I was able to remove all namespaces but not able to remove xsi:type using XSL.
XML:
<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
<StudentResult xmlns='http://ns.xyz.org/2004-08-02' xmlns:xsd='http://www.w3.org/2001/XMLSchema' xmlns:ns1='http://ns.xyz.org/2004-08-02' xmlns:soapenv='http://schemas.xmlsoap.org/soap/envelope/' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xsi:type='ns1:StudentResult'>
<StudentId idOwner='xyz'><IdValue name='ClientId'>9103-XML</IdValue></StudentId>
<ClientOrderId idOwner='Cloud'><IdValue name='OrderNumber'>272454</IdValue></ClientOrderId>
<Results>false</Results>
</StudentResult>
Desired Output:
<?xml version="1.0" encoding="utf-8"?>
<StudentResult>
<StudentId idOwner="xyz"><IdValue name="ClientId">9103-XML</IdValue></StudentId>
<ClientOrderId idOwner="Cloud"><IdValue name="OrderNumber">272454</IdValue></ClientOrderId>
<Results>false</Results>
</StudentResult>
This is the xslt I used but it did not help.
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output indent="yes" method="xml" encoding="utf-8" />
<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:template match="/">
<xsl:apply-templates select="#*|node()|processing-instruction()"/>
</xsl:template>
</xsl:stylesheet>

Answer 1

Add a template
<xsl:template match="#xsi:type"/>
plus
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
exclude-result-prefixes="xsi">
on the stylesheet's root element.

Answer 2

This transformation:
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output omit-xml-declaration="yes" indent="yes"/>
<xsl:strip-space elements="*"/>
<xsl:template match="node()[not(self::*)]">
<xsl:copy/>
</xsl:template>
<xsl:template match="*">
<xsl:element name="{local-name()}">
<xsl:apply-templates select="#*[not(name()='xsi:type')]|node()"/>
</xsl:element>
</xsl:template>
<xsl:template match="#*">
<xsl:attribute name="{local-name()}">
<xsl:value-of select="."/>
</xsl:attribute>
</xsl:template>
</xsl:stylesheet>
when applied on the provided XML document:
<StudentResult
xmlns='http://ns.xyz.org/2004-08-02'
xmlns:xsd='http://www.w3.org/2001/XMLSchema'
xmlns:ns1='http://ns.xyz.org/2004-08-02'
xmlns:soapenv='http://schemas.xmlsoap.org/soap/envelope/'
xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance'
xsi:type='ns1:StudentResult'>
<StudentId idOwner='xyz'>
<IdValue name='ClientId'>9103-XML</IdValue>
</StudentId>
<ClientOrderId idOwner='Cloud'>
<IdValue name='OrderNumber'>272454</IdValue>
</ClientOrderId>
<Results>false</Results>
</StudentResult>
produces the wanted, correct result:
<StudentResult>
<StudentId idOwner="xyz">
<IdValue name="ClientId">9103-XML</IdValue>
</StudentId>
<ClientOrderId idOwner="Cloud">
<IdValue name="OrderNumber">272454</IdValue>
</ClientOrderId>
<Results>false</Results>
</StudentResult>