Constructing variable with template in XSLT and then applying xpath - xpath

Question

I am using following xslt
<xsl:stylesheet version="2.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns="http://www.test.com/services/test/test/v1">
<xsl:output method="xml" encoding="UTF-8"
omit-xml-declaration="yes" indent="yes" />
<xsl:strip-space elements="*" />
<xsl:template match="/">
<xsl:variable name="mytree">
<xsl:call-template name="myvariable">
</xsl:call-template>
</xsl:variable>
<xsl:choose>
<xsl:when test="count($mytree/foos/foo) > 1">
<xsl:copy-of select="$mytree"/>
</xsl:when>
<xsl:otherwise>
<error>test</error>
</xsl:otherwise>
</xsl:choose>
</xsl:template>
<xsl:template name="myvariable">
<foos>
<foo>bar1</foo>
<foo>bar2</foo>
<foo>bar3</foo>
<foo>bar4</foo>
</foos>
</xsl:template>
</xsl:stylesheet>
When i use above xslt it should be following output
<foos xmlns="http://www.test.com/services/test/test/v1">
<foo>bar1</foo>
<foo>bar2</foo>
<foo>bar3</foo>
<foo>bar4</foo>
</foos>
but it is
<error xmlns="http://www.test.com/services/test/test/v1">test</error>
when i remove the xmlns="http://www.test.com/services/test/test/v1" output is proper. Not sure what is happening?

Answer 1

Well, with any XML, whether constructed inside of your XSLT or read from a source, if you have elements in a certain namespace, then, to select them with XPath in XSLT, in XSLT 2 you have two options, either use xpath-default-namespace="http://www.test.com/services/test/test/v1" (e.g. <xsl:when test="count($mytree/foos/foo) > 1" xpath-default-namespace="http://www.test.com/services/test/test/v1">) or bind the namespace to a prefix (e.g. <xsl:when xmlns:v1="http://www.test.com/services/test/test/v1" test="count($mytree/v1:foos/v1:foo) > 1">).
You can use these approaches on an ancestor element, for instance the root element of the stylesheet, if it does not interfere with other selections you want to make.

Answer 2

You have to specify qualified element names in your XPath expression to address the foos and foo elements in your default namespace http://www.test.com/services/test/test/v1:
Register the default namespace once more with a namespace prefix (e.g. myns): xmlns:myns="http://www.test.com/services/test/test/v1"
Use that namepace prefix in your XPath expressions to address nodes in that namespace (e.g. myns:foos/myns:foo).
Add exclude-result-prefixes="myns" to suppress the myns prefix in your result document.
<xsl:stylesheet version="2.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns="http://www.test.com/services/test/test/v1"
xmlns:myns="http://www.test.com/services/test/test/v1"
exclude-result-prefixes="myns">
…
<xsl:template match="/">
…
<xsl:choose>
<xsl:when test="count($mytree/myns:foos/myns:foo) > 1">
<xsl:copy-of select="$mytree"/>
</xsl:when>
<xsl:otherwise>
<error>test</error>
</xsl:otherwise>
</xsl:choose>
</xsl:template>
…
</xsl:stylesheet>
see XSLT Fiddle
If you only had an XSLT 1.0 processor at hand, you would need the EXSLT node-set function to access the $mytree variables from the result tree:
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns="http://www.test.com/services/test/test/v1"
xmlns:exsl="http://exslt.org/common"
extension-element-prefixes="exsl"
xmlns:myns="http://www.test.com/services/test/test/v1"
exclude-result-prefixes="myns">
…
<xsl:template match="/">
…
<xsl:choose>
<xsl:when test="count(exsl:node-set($mytree)/myns:foos/myns:foo) > 1">
<xsl:copy-of select="$mytree"/>
</xsl:when>
<xsl:otherwise>
<error>test</error>
</xsl:otherwise>
</xsl:choose>
</xsl:template>
…
</xsl:stylesheet>

Answer 3

Use code for remove namespace
<xsl:template match="#*[namespace-uri() = 'http://www.test.com/services/test/test/v1']"/>