namesapce-uri() method returns emty, when using xala

hey list,
i am using xalan 2.0.

 say for example my xml document is as follows:

<?xml version="1.0"?>
<a:root xmlns:a="name-a">
	<b:sub xmlns:b="name-b"/>
	<c:sub xmlns:c="name-c"/>
</a:root>

here is my XSl ::

<?xml version="1.0"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0"
  xmlns:a="name-a"  xmlns:b="name-b"  xmlns:c="name-c">

<xsl:template match="/">
  <xsl:for-each select="root">
   <uri><xsl:value-of select="namespace-uri()"/></uri>
 </xsl:for-each>
</xsl:template>
</xsl:stylesheet>

when i transform using Trax api i am getting namespace-uri() method returns emty.i have no clue.

sumalatha challa
 


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