[xsl] How to sort and compare with different element value in XSL

["Rahul Singh rahulsinghindia15@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>]

I have only one XML. and there <Nid> contains same data like 892828740. I
want get the Id,LastModifiedDate,Nid for Contact based on updated
LastModifiedDate if <Nid> has more then one same kind of data. Below is my
Input data, XSL, expected output. But my code is not working fine

Below is XML:

<?xml version="1.0" encoding="UTF-8"?>
<objects>
  <Contact>
    <Id>003j000001DQMkcAAH</Id>
    <LastModifiedDate>2016-09-08T10:31:24.000Z</LastModifiedDate>
    <Nid>892828740</Nid>
  </Contact>
  <Contact>
    <Id>003j000001DQMlXAAX</Id>
    <LastModifiedDate>2016-09-08T10:22:47.000Z</LastModifiedDate>
    <Nid>879284114</Nid>
  </Contact>
  <Contact>
    <Id>003j000001DQMlYAAX</Id>
    <LastModifiedDate>2016-09-08T10:22:47.000Z</LastModifiedDate>
    <Nid>882692370</Nid>
  </Contact>
  <Contact>
    <Id>003j000001DQMlZAAX</Id>
    <LastModifiedDate>2016-09-08T10:22:47.000Z</LastModifiedDate>
    <Nid>892828740</Nid>
  </Contact>
 </objects>



Below in XSL:

<xsl:stylesheet version="2.0" xmlns:xsl="
http://www.w3.org/1999/XSL/Transform";>
    <xsl:output method="xml" omit-xml-declaration="yes" indent="yes"/>
    <xsl:template match="objects">
        <xsl:if test="count(//Contact/Nid[(. =
../following-sibling::Contact/Nid)])">
            <Nids>

                <Nid>
                    <Id>
                        <xsl:value-of
                            select="//Contact/Nid[(. =
../following-sibling::Contact/Nid)]"/>
                    </Id>
                    <LastModifiedDate>
                        <xsl:value-of select="//LastModifiedDate"/>
                    </LastModifiedDate>
                    <Nid/>
                </Nid>

            </Nids>
        </xsl:if>
    </xsl:template>
</xsl:stylesheet>




Expected output:

<objects>
  <Contact>
    <Id>003j000001DQMkcAAH</Id>
    <LastModifiedDate>2016-09-08T10:31:24.000Z</LastModifiedDate>
    <Nid>892828740</Nid>
  </Contact>
  <Contact>
    <Id>003j000001DQMlXAAX</Id>
    <LastModifiedDate>2016-09-08T10:22:47.000Z</LastModifiedDate>
    <Nid>879284114</Nid>
  </Contact>
  <Contact>
    <Id>003j000001DQMlYAAX</Id>
    <LastModifiedDate>2016-09-08T10:22:47.000Z</LastModifiedDate>
    <Nid>882692370</Nid>
  </Contact>
</objects>