XPath addressing of UML stereotype inside XMI file

Question

I have a problem with XSLT/XPath when parsing my UML file (XMI).

The following expressions behave differently ($thisId contains the xmi:id of the class to check whether it is enhanced by the stereotype 'revisioned' inside 'itechnical_Profile'):

1)

<xsl:value-of select="//*:revisioned[@base_Class = $thisId]/@xmi:id"/>

gives me correct id '_16_5_1_29f0058e_1359051179028_158208_16339application2'.

2)

<xsl:value-of select="//itechnical_Profile:revisioned[@base_Class = $thisId]/@xmi:id"/>

gives me no output at all.

3)

<xsl:value-of select="/xmi:XMI/*:revisioned[@base_Class = $thisId]/@xmi:id"/>

gives me correct id '_16_5_1_29f0058e_1359051179028_158208_16339application2'.

I have checked with

<xsl:value-of select="name(/xmi:XMI/*:revisioned[@base_Class = $thisId])"/>

that the node is named 'itechnical_Profile:revisioned'.

I have also checked with

<xsl:value-of select="name(/xmi:XMI/*:revisioned[@base_Class = $thisId]/..)"/>

that the parent node is named 'xmi:XMI'.

So why does 2) fail?

With the stereotype 'UML_Standard_Profile:entity' it works flawlessly.

Is my understanding of '//' wrong?

Thanks in advance!

Shortening the XMI file would be quite some work ... so after some debugging I have come up with the following workaround:

<xsl:function name="itechnical_uml:enhancedByStereotype_revisioned" as="xs:boolean">
  <xsl:param name="packagedElementNode" as="element()"/>

  <xsl:variable name="elementName" select="local-name($packagedElementNode)"/>
  <xsl:if test="($elementName != 'packagedElement')">
    <xsl:message terminate="yes">
      Error: this is not a packagedElement!
    </xsl:message>
  </xsl:if>

  <xsl:if test="($packagedElementNode/@xmi:type != 'uml:Class')">
    <xsl:message terminate="yes">
      <xsl:text>Error: this is a packagedElement but not with xmi:type = 'uml:Class'!&#xa;</xsl:text>
    </xsl:message>
  </xsl:if>

  <xsl:variable name="thisId" select="$packagedElementNode/@xmi:id"/>

  <xsl:variable name="stereotypeID">
    <xsl:value-of select="root($packagedElementNode)//stereotype[@name = 'itechnical_Profile:revisioned']/@stereotypeID"/>
  </xsl:variable>
  <xsl:if test="$stereotypeID = ''">
    <xsl:message terminate="yes">
      <xsl:text>Error: unable to find xmi:id of stereotype 'itechnical_Profile:revisioned'!&#xa;</xsl:text>
    </xsl:message>
  </xsl:if>

  <xsl:variable name="resultSet" as="element()*" select="root($packagedElementNode)/xmi:XMI/*:revisioned[@base_Class = $thisId]"/>

  <xsl:choose>
    <xsl:when test="$resultSet/@xmi:id != ''">
      <xsl:value-of select="true()"/>
    </xsl:when>
    <xsl:otherwise>
      <xsl:value-of select="false()"/>
    </xsl:otherwise>
  </xsl:choose>
</xsl:function>

Checking the 'xmlns:itechnical_Profile' definitions inside UML XMI and my XSLT scripts did not show up any problems.