XSLT Transformer xmlns namespace problem

Question

Hi,
I have the following xml document
<PIPEDocument Version="2.0" DocumentReferenceNumber="2001" CreationDate="2002070401251212245"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xmlns="http://www.oeb.gov.on.ca/">
     <MarketParticipantDirectory>
</MarketParticipantDirectory>
</PIPEDocument>
and the following xsl stylesheet
<xsl:stylesheet xmlns:xsl = "http://www.w3.org/1999/XSL/Transform"
          xmlns ="http://www.oeb.gov.on.ca/"
          version = "1.0">
<xsl:output method = "xml" indent = "yes" />
<xsl:template match = "/" >
<PIPEFunctionalAcknowledgement>
          <xsl:apply-templates select="//MarketParticipantDirectory"/>
</PIPEFunctionalAcknowledgement>
</xsl:template>
<xsl:template match = "MarketParticipantDirectory" >
</xsl:template>
</xsl:stylesheet>           
My problem is, using JAXP1.2.0-EA2 (from JWSDP1-0-ea2), javax.xml.transform.Transformer will not find a match on the element name within the template unless I put a prefix on the target namespace i.e.
if my xml is changed to include a prefix (:xyz in example below)
<PIPEDocument Version="2.0" DocumentReferenceNumber="2001" CreationDate="2002070401251212245"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xmlns:xyz="http://www.oeb.gov.on.ca/">
     <MarketParticipantDirectory>
</MarketParticipantDirectory>
</PIPEDocument>
and my stylesheet is changed also to include the prefix
<xsl:stylesheet xmlns:xsl = "http://www.w3.org/1999/XSL/Transform"
          xmlns:xyz ="http://www.oeb.gov.on.ca/"
          version = "1.0">
</xsl:stylesheet>
then the transfomer works correctly and find a match on the element name "MarketParticipantDirectory" within the template (even though the element doesn't have the prefix xyz:MarketParticipantDirectory).
Could anyone tell me why this is the case?
I would have expected XSLT to match the elements from the namespace xmlns ="http://www.oeb.gov.on.ca/" without the prefix.
Any comments would be much appreciated.
Thanks
Sinead Casey

Answer 1

Matching an element on a Default Namespace requires Explicit Prefix.
http://www.w3.org/TR/xslt20req