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How to avoid the duplicate being printed [ URGENT !!! ]


All,

My XML reads as follows:
--------------------------
<Messages>
<Message date="2001-06-01 14:24:02.0" id="10" parentId="0" sectionId="10">
<Title>first title</Title>
<Author>vasan</Author>
</Message>

<Message date="2001-06-01 14:24:51.0" id="11" parentId="0" sectionId="10">
<Title>second title</Title>
<Author>vasan</Author>
</Message>

<Message date="2001-06-01 14:25:16.0" id="12" parentId="0" sectionId="10">
<Title>third title</Title>
<Author>vasan</Author>
</Message>

<Message date="2001-06-01 16:12:22.0" id="13" parentId="0" sectionId="10">
<Title>fourth title</Title>
<Author>vasan</Author>
</Message>

<Message date="2001-06-01 16:31:51.0" id="15" parentId="10" sectionId="10">
<Title>reply to first titel</Title>
<Author>vasan</Author>
</Message>

<Message date="2001-06-01 16:34:04.0" id="16" parentId="11" sectionId="10">
<Title>rely to second title</Title>
<Author>vasan</Author>
</Message>

<Message date="2001-06-01 16:34:50.0" id="17" parentId="15" sectionId="10">
<Title>re re first title</Title>
<Author>vasan</Author>
</Message>

<Message date="2001-06-01 16:36:22.0" id="18" parentId="12" sectionId="10">
<Title>reply to third title</Title>
<Author>vasan</Author>
</Message>

<Message date="2001-06-01 16:36:52.0" id="19" parentId="13" sectionId="10">
<Title>reply to fourth title</Title>
<Author>vasan</Author>
</Message>

<Message date="2001-06-01 16:37:18.0" id="20" parentId="0" sectionId="10">
<Title>fifth title</Title>
<Author>vasan</Author>
</Message>

</Messages>

My xsl reads as follows:
-------------------------
<xsl:template match="Messages">
		<xsl:apply-templates select="Message[@parentId=0]"/>
</xsl:template>

<xsl:template match="Message">
<DIV onclick="getMessage(this);" style="margin-left:36px;cursor:default;" >
	<xsl:attribute name="messageID"><xsl:value-of 
select="@id"/></xsl:attribute>
	<xsl:attribute name="sectionID"><xsl:value-of 
select="@sectionId"/></xsl:attribute>
	<xsl:attribute name="parentID"><xsl:value-of 
select="@parentId"/></xsl:attribute>
	<xsl:value-of select="Title"/>
	<xsl:text>
	</xsl:text>
	<xsl:text>by
	</xsl:text>
	<xsl:text>
	</xsl:text>
	<xsl:text>
	</xsl:text>
	<xsl:value-of select="Author"/>
	<xsl:variable name="id"><xsl:value-of select="@id"/></xsl:variable>
	<xsl:apply-templates select="../Message[@parentId=$id]"/>
</DIV>
</xsl:template>


Current Output:
================
first title by vasan

reply to first titel by vasan

re re first title by vasan

second title by vasan

rely to second title by vasan

third title by vasan

reply to third title by vasan

fourth title by vasan

reply to fourth title by vasan

***************DUPLICATED AGAIN**************
reply to first titel by vasan

re re first title by vasan

rely to second title by vasan

re re first title by vasan

reply to third title by vasan

reply to fourth title by vasan
*******************END DUPLICATE************

fifth title by vasan

I want to get rid of this duplicate entires, as it has been printed already, 
how shall i do it??.

Can anyone help me out please please...

Thanks
Srini

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