XSLT transfomration not mapping right [duplicate] - xslt

Question

I have an XML document with a default namespace indicated at the root.
Something like this:
<MyRoot xmlns="http://www.mysite.com">
<MyChild1>
<MyData>1234</MyData>
</MyChild1>
</MyRoot>
The XSLT to parse the XML does not work as expected because of the
default namespace, i.e. when I remove the namespace, everything works as
expected.
Here is my XSLT:
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xsl:template match="/" >
<soap:Envelope xsl:version="1.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
<soap:Body>
<NewRoot xmlns="http://wherever.com">
<NewChild>
<ChildID>ABCD</ChildID>
<ChildData>
<xsl:value-of select="/MyRoot/MyChild1/MyData"/>
</ChildData>
</NewChild>
</NewRoot>
</soap:Body>
</soap:Envelope>
</xsl:template>
</xsl:stylesheet>
What needs to be done with XSLT document so that translation works properly? What exactly needs to be done in XSLT document?

Answer 1

You need to declare the namespace in your XSLT, and use it in XPath expressions. E.g.:
<xsl:stylesheet ... xmlns:my="http://www.mysite.com">
<xsl:template match="/my:MyRoot"> ... </xsl:template>
</xsl:stylesheet>
Note that you must provide some prefix if you want to refer to elements from that namespace in XPath. While you can just do xmlns="..." without the prefix, and it will work for literal result elements, it won't work for XPath - in XPath, an unprefixed name is always considered to be in namespace with blank URI, regardless of any xmlns="..." in scope.

Answer 2

If you use XSLT 2.0, specify xpath-default-namespace="http://www.example.com" in the stylesheet section.

Answer 3

If this was kind of name space problem, there is room to try to modify two things in the xslt file:
add "my" name space definition in xsl:stylesheet tag
use "my:" prefix when call elements in traversing the xml file.
result
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:my="http://www.w3.org/2001/XMLSchema">
<xsl:template match="/" >
<soap:Envelope xsl:version="1.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
<soap:Body>
<NewRoot xmlns="http://wherever.com">
<NewChild>
<ChildID>ABCD</ChildID>
<ChildData>
<xsl:value-of select="/my:MyRoot/my:MyChild1/my:MyData"/>
</ChildData>
</NewChild>
</NewRoot>
</soap:Body>
</soap:Envelope>
</xsl:template>
</xsl:stylesheet>