error message on keyref constraint violation

[xin wang <xv...@yahoo.com>]

In the attached xml file, B.ref should reference A.id.
When it does not, we get:

Error at file keyrefTest.xml, line 6, char 8
  Message: The key for identity constraint of element
'test' is not found.

Notice that line 6 is the last line of the file. Is
there any way for the error message to point to the
line where the wrong keyref actually appears (in this
case, line 5 <B ref="ab"/> ).

victoria

The xml file:
<?xml version="1.0"?>
<test
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:noNamespaceSchemaLocation="keyrefTest.xsd">
<A id="abc"/>
<B ref="ab"/>
</test>

The schema:
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema
xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:element name="test">
  <xs:complexType>
  <xs:sequence>

    <xs:element name="A">
      <xs:complexType>
      <xs:attribute name="id" type="xs:string"/>
      </xs:complexType>
    </xs:element>

    <xs:element name="B">
      <xs:complexType>
      <xs:attribute name="ref" type="xs:string"/>
      </xs:complexType>
    </xs:element>

  </xs:sequence>
  </xs:complexType>

  <xs:unique name="aid">
    <xs:selector xpath="A"/>
    <xs:field xpath="@id"/>
  </xs:unique>

  <xs:keyref name="aref" refer="aid">
    <xs:selector xpath="B"/>
    <xs:field xpath="@ref"/>
  </xs:keyref>

</xs:element>
</xs:schema>




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