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Alternative XPath id () in .NET

I have the following XML document:

<text xmlns:its="http://www.w3.org/2005/11/its" >
 <its:rules version="2.0">
  <its:termRule selector="//term" term="yes" termInfoPointer="id(@def)"/>
 </its:rules>
 <p>We may define <term def="TDPV">discoursal point of view</term>
 as <gloss xml:id="TDPV">the relationship, expressed through discourse
  structure, between the implied author or some other addresser,
  and the fiction.</gloss>
 </p>
</text>

termInfoPointeris an XPath expression that points to an element <gloss xml:id="TDPV">.

I use LINQ-to-XML to select it.

XElement term = ...;
object value = term.XPathEvaluate("id(@def)");

I get the following exception: System.NotSupportedException: This XPathNavigator does not support IDs.

I could not find a solution to this problem, so I tried replacing id()with other expressions:

//*[@xml:id='TDPV'] // works, but I need to use @def

//*[@xml:id=@def]
//*[@xml:id=@def/text()]
//*[@xml:id=self::node()/@def/text()]

but none of these works.

Is there a way to implement id()or replace it with another expression?

I would prefer a solution / workaround that does not involve replacing id()with another expression, because this expression can be something complicated, for example id(@def) | id(//*[@attr="(id(@abc()))))))"]).

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1 answer

def XML-, :

//*[@xml:id = //@def]

def, XPath, def:

//*[@xml:id = someExpressionSelectingTheWantedDefAttribute]

XSLT:

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
 <xsl:output omit-xml-declaration="yes" indent="yes"/>

 <xsl:template match="/">
     <xsl:copy-of select="//*[@xml:id = //@def]"/>
 </xsl:template>
</xsl:stylesheet>

XML-:

<text xmlns:its="http://www.w3.org/2005/11/its" >
 <its:rules version="2.0">
  <its:termRule selector="//term" term="yes" termInfoPointer="id(@def)"/>
 </its:rules>
 <p>We may define <term def="TDPV">discoursal point of view</term>
 as <gloss xml:id="TDPV">the relationship, expressed through discourse
  structure, between the implied author or some other addresser,
  and the fiction.</gloss>
 </p>
</text>

XPath , ( ) :

<gloss xmlns:its="http://www.w3.org/2005/11/its" xml:id="TDPV">the relationship, expressed through discourse
  structure, between the implied author or some other addresser,
  and the fiction.</gloss>
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