json to XML using XSL - json

Question

I need to transform a json message to XML. I have created a basic XSL transform script but the resulting XML uses 'map' tags with the json values as 'key' attributes.
Is there a way to have the name values used as tags or do I have to write a second transform XSL to get what I want?
json:
<?xml version="1.0"?>
<data>
{ "Policies":
{
"Policy": {
"PolicyNum": "1234",
"Customer": "Smith"
},
"Policy": {
"PolicyNum": "5678",
"Customer": "Jones"
}
}
}
</data>
xsl:
<?xml version="1.0"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:math="http://www.w3.org/2005/xpath-functions/math" xmlns:xs="http://www.w3.org/2001/XMLSchema" exclude-result-prefixes="xs math" version="3.0">
<xsl:output indent="yes" omit-xml-declaration="no" />
<xsl:template match="data">
<xsl:copy-of select="json-to-xml(.)"/>
</xsl:template>
</xsl:stylesheet>
resulting XML: (using https://xslttest.appspot.com/)
<?xml version="1.0" encoding="UTF-8"?>
<map xmlns="http://www.w3.org/2005/xpath-functions">
<map key="Policies">
<map key="Policy">
<string key="PolicyNum">1234</string>
<string key="Customer">Smith</string>
</map>
<map key="Policy">
<string key="PolicyNum">5678</string>
<string key="Customer">Jones</string>
</map>
</map>
</map>
The XML I need:
<Policies>
<Policy>
<PolicyNum>1234</PolicyNum>
<Customer>Smith</Customer>
</Policy>
<Policy>
<PolicyNum>5678</PolicyNum>
<Customer>Jones</Customer>
</Policy>
</Policies>

Answer 1

Instead of copying the XML map, push it through templates and transform that map into elements using the #key for the name:
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:math="http://www.w3.org/2005/xpath-functions/math"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:fn="http://www.w3.org/2005/xpath-functions"
exclude-result-prefixes="xs math" version="3.0">
<xsl:output indent="yes" omit-xml-declaration="no" />
<xsl:template match="data">
<xsl:apply-templates select="json-to-xml(.)"/>
</xsl:template>
<xsl:template match="fn:*[#key]">
<xsl:element name="{#key}">
<xsl:apply-templates />
</xsl:element>
</xsl:template>
<xsl:template match="fn:map">
<xsl:apply-templates/>
</xsl:template>
</xsl:stylesheet>