this is my input xml file
<entity key="Client IP">
            <launching>
                <parameters>
                    <values>
                        <value parameter-name="launched-product-code" parameter-value="IS"/>
                        <value parameter-name="apptier-id" parameter-value="!~apptier_id!~"/>

                    </values>
                </parameters>
            </launching>
        </entity>

and I want my output to be
<entity key="Client IP">
            <launching>
                <parameters>
                    <values>
                        <value parameter-name="launched-product-code" parameter-value="IS"/>
                        <value parameter-name="timeFrame" parameter-value="!~timeframe!~"/>

                    </values>
                </parameters>
            </launching>
        </entity>

how do I write in in xsl format?
thanks

what do you mean? do you want to transform this xml code?

<xsl:template match="value[@parameter-name='apptier-id']">
  <xsl:copy>
    <xsl:attribute name="parameter-name">timeFrame</xsl:attribute>
    <xsl:attribute name="parameter-value">!~apptier_id!~</xsl:attribute>
  </xsl:copy>
</xsl:template>

<xsl:template match="*|@*">
  <xsl:copy>
    <xsl:apply-templates/>
  </xsl:copy>
</xsl:template>