XSL Key

you can segregate distinct values using xsl:key from XML 



<xsl:stylesheet version="2.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:key name="Brand-Id" match="//row" use="@BrandId"/>

  <xsl:template match="/">
 <table cellpadding="4"  Id="xsltable"  width="70%" align="center">
  <tr class="tablecontent2">
   <td> 
          <xsl:apply-templates 
    select="/Root/row[generate-id()=generate-id(key('Brand-Id',@BrandId)[1])]" 
    mode="Brand"/>
     </td>
  </tr>
  </table>
  </xsl:template>
 
 
 <xsl:template match="row" mode="Brand">
  <xsl:variable name="brandid" select="@BrandId"/>
  <xsl:value-of select="/Root/row[@BrandId=$brandid]/@BrandName"/>
 
 </xsl:stylesheet>