The xml::xslt documentation indicates I should use the format: <xsl:when test="path/@attr='value'"> to select an element by specifying an attribute value. When I use it, I get unexpected results. Am I using incorrect syntax?

foo.pl: 

#!/usr/bin/perl

use strict;
use warnings;

use XML::XSLT         qw( );
use Object::Destroyer qw( );

my $xslt = Object::Destroyer->new(
    XML::XSLT->new('foo.xslt', warnings => 1),
    'dispose',
);

$xslt->transform('foo.xml');
print $xslt->toString;
[download]

foo.xml:

<?xml version="1.0" encoding="utf-8"?>
<PLMXML xmlns="http://www.plmxml.org/Schemas/PLMXMLSchema">
  <Form id="id24" name="160D999998-98/01" accessRefs="#id3" subType="P
+art Revision Master" subClass="Part Revision Master">
  </Form>
  <Form id="id30" name="09A10-000019/A-AF Engineering Or" accessRefs="
+#id3" subType="AF Engineering Order E" subClass="AF Engineering Order
+ E">
  </Form>
  <Form id="id33" name="09A10-000019/A-AF Design/Draftin" accessRefs="
+#id3" subType="AF Design/Drafting Request A" subClass="AF Design/Draf
+ting Request A">
  </Form>
  <Form id="id36" name="09A10-000019/A" accessRefs="#id3" subType="Eng
+Change Revision Master" subClass="EngChange Revision Master">
  </Form>
</PLMXML>
[download]

foo.xslt:

<?xml version="1.0"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Tr
+ansform">
<xsl:template match="/">
<xsl:for-each select="/PLMXML/Form">
        <xsl:if test="/PLMXML/Form[@id=id]">
       <xsl:value-of select="@id"/>
    </xsl:if>
</xsl:for-each>
</xsl:template>
</xsl:stylesheet>
[download]

Returns:id24id30id33id36 Also Tried:

<xsl:for-each select="/PLMXML/Form">
        <xsl:if test="/PLMXML/Form[@id=id*]">
       <xsl:value-of select="@id"/>
    </xsl:if>
</xsl:for-each>
[download]

Returns:id24id30id33id36 Also Tried:

<xsl:for-each select="/PLMXML/Form">
        <xsl:if test="/PLMXML/Form[@id=id24]">
       <xsl:value-of select="@id"/>
    </xsl:if>
</xsl:for-each>
[download]

Returns:id24id30id33id36 Also Tried:

<xsl:for-each select="/PLMXML/Form">
        <xsl:if test="/PLMXML/Form[@id=id2]">
       <xsl:value-of select="@id"/>
    </xsl:if>
</xsl:for-each>
[download]

Returns:id24id30id33id36 Also Tried:

<xsl:for-each select="/PLMXML/Form">
        <xsl:if test="/PLMXML/Form[@id=]">
       <xsl:value-of select="@id"/>
    </xsl:if>
</xsl:for-each>
[download]

Returns:id24id30id33id36

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