XSV 2.10 IDC-XPath problem when using "child::"

Hi,

An XSV 2.10 crash; probably due to the "child::" in the
<xsd:selector xpath="child::foo:item"/>.
It works fine if I change the XPath expression to "foo:item".

XSV's Error report:

<xsv xmlns="http://www.w3.org/2000/05/xsv" docElt="{urn:test:foo}foo"
     instanceAssessed="false" schemaErrors="0"
     schemaLocs="urn:test:foo -> idc-xpath-1.xsd"
     target="file:///p:/libxml2-lab/tests/2005-10-19/idc-xpath-1.xml"
     version="XSV 2.10-1 of 2005/04/22 13:10:49">
  <schemaDocAttempt
    URI="file:///p:/libxml2-lab/tests/2005-10-19/idc-xpath-1.xsd"
                    namespace="urn:test:foo" outcome="failure"
                    source="schemaLoc"/>
  <bug>validator crash during schemaLoc:
Traceback (most recent call last):
  File ".\XSV\compile\SSchema.py", line 647, in checkinSchema
  File ".\XSV\compile\SSchema.py", line 377, in fromFile
  File ".\XSV\infoset\relNorm\rebuild.py", line 281, in fromFile
  File ".\XSV\infoset\relNorm\rebuild.py", line 365, in processElement
  File ".\XSV\infoset\relNorm\rebuild.py", line 365, in processElement
  File ".\XSV\infoset\relNorm\rebuild.py", line 403, in processElement
  File ".\XSV\compile\elts\idElts.py", line 11, in init
  File ".\XSV\compile\KCons.py", line 22, in __init__
  File ".\XSV\util\xpath.py", line 17, in __init__
  File ".\XSV\util\xpath.py", line 24, in parse
  File ".\XSV\util\xpath.py", line 23, in &lt;lambda>
  File ".\XSV\util\xpath.py", line 22, in &lt;lambda>
  File ".\XSV\util\xpath.py", line 44, in patBit
KeyError: u'child'
</bug>
</xsv>

The scenario:

idc-xpath-1.xsd
---------------
<xsd:schema
	xmlns:xsd="http://www.w3.org/2001/XMLSchema"
	targetNamespace="urn:test:foo"
	xmlns:foo="urn:test:foo">

	<xsd:element name="item">
		<xsd:complexType>
			<xsd:sequence>
				<xsd:element ref="foo:item" minOccurs="0" maxOccurs="5"/>
			</xsd:sequence>
			<xsd:attribute name="val" type="xsd:string"/>
		</xsd:complexType>
	</xsd:element>

	<xsd:element name="foo">
		<xsd:complexType>
			<xsd:sequence>
				<xsd:element ref="foo:item"/>
			</xsd:sequence>			
		</xsd:complexType>

		<xsd:unique name="ukey">
			<!-- 
				"./ /."
				"child ::imp:iid"
			-->
			<xsd:selector xpath="child::foo:item"/>
			<xsd:field xpath="@val"/>
		</xsd:unique>
	</xsd:element>

</xsd:schema>

idc-xpath-1.xml
---------------
<foo xmlns="urn:test:foo"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="urn:test:foo idc-xpath-1.xsd">

	<item val="1">
		<item val="2">
			<item val="3"/>
		</item>
		<item val="4"/>
	</item>
</foo>




Regards,

Kasimier