[xsl] distinct values by xslt

Hi List,
Anyone have any idea about to find out distinct attribute value by xslt.
Figure 2 and Figure 3 are getting deleted by the logic provided by me as
shown in the below XSLT. Below are the require things
 
XSLT
<xsl:template match="p">
<p class="Para_indented">
 <xsl:apply-templates/>
</p>
  <xsl:if test="link[@type='figure']">
   <xsl:variable name="figid" select="link[@type='figure']/@rid"/>
   <xsl:if test="not(preceding::link[@type='figure'][@rid=$figid])">
    <xsl:apply-templates select="//object[@id=$figid]"/>
   </xsl:if>
  </xsl:if>
  <xsl:if test="link[@type='table']">
   <xsl:variable name="tableid" select="link[@type='table']/@rid"/>
   <xsl:if test="not(preceding::link[@type='table'][@rid=$tableid])">
    <xsl:apply-templates select="//object[@id=$tableid]"/>
   </xsl:if>
  </xsl:if>
</xsl:template>

 
Input
<p>First One of the primary goals (<link rid="f1" type="figure">Fig.
1</link>).</p>
<p>second (see <link rid="f2" type="figure">Fig. 2</link>) and thos and
<link rid="f3" type="figure">Fig. 3</link>). supporting the prediction that
these species accelerate their development at the expense of growth (<link
rid="f1" type="figure">Fig. 1</link>).</p>
 
 
Required OUTPUT
<p class="Para_Indented">First One of the primary goals (<a class="figcit"
href="#fig1">Fig. 1</a>).</p>
<div class="divFigure">
 <table class="Figure" width="100%" align="center" border="0" id="fig1">
 </table>
</div>
<p class="Para_Indented">second (see <a class="figcit" href="#fig2">Fig.
2</a>) and thos and <a class="figcit" href="#fig3">Fig. 3</a>). supporting
the prediction that these species accelerate their development at the
expense of growth (<a class="figcit" href="#fig1">Fig. 1</a>).</p>
<div class="divFigure">
 <table class="Figure" width="100%" align="center" border="0" id="fig2">
 </table>
</div>
<div class="divFigure">
 <table class="Figure" width="100%" align="center" border="0" id="fig3">
 </table>
</div>
 
CURRENT OUTPUT
<p class="Para_Indented">First One of the primary goals (<a class="figcit"
href="#fig1">Fig. 1</a>).</p>
<div class="divFigure">
 <table class="Figure" width="100%" align="center" border="0" id="fig1">
 </table>
</div>
<p class="Para_Indented">second (see <a class="figcit" href="#fig2">Fig.
2</a>) and thos and <a class="figcit" href="#fig3">Fig. 3</a>). supporting
the prediction that these species accelerate their development at the
expense of growth (<a class="figcit" href="#fig1">Fig. 1</a>).</p>






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