XSLT template display part of article as summary

When created news, articles, and etc..., I want to take part of article as summary displayed in listing and headlines.I Created XSLT which can be used for this functionality:

<xsl:template name="trimPara">     <!-- pass the string to be cropped with required string length -->     <xsl:param name="stringLenRequired"/>     <xsl:param name="stringInput"/>     <xsl:value-of disable-output-escaping="yes" select="substring($stringInput,1,number($stringLenRequired))"/>     <xsl:value-of disable-output-escaping="yes" select="substring-before(concat(substring($stringInput,number($stringLenRequired)+1,number($stringLenRequired) +20),' ' ),' ')"/>     <!-- to make it a full word -->     <xsl:if test="string-length($stringInput) > number($stringLenRequired)">...</xsl:if>   </xsl:template>

You can call this template by the following:

<xsl:call-template name="trimPara">             <xsl:with-param  name="stringLenRequired">200</xsl:with-param>             <xsl:with-param name="stringInput" select="@Body"/>           </xsl:call-template>         </div>