XML : XSLT copy output without node and filter on key

XML Input:

  <root>      <results>          <output>              <tag1>                  <tag2>                      <tag3>                          <tag4>2016-03-27T14:27:10.542+03:00</tag4>                      </tag3>                      <tag5/>                      <tag6>                          <record>                              <column name="Result">smth</column>                          </record>                      </tag6>                  </tag2>              </tag1>          </output>      </results>      <DesiredParentTag UserName="admin" UserId="1" timestamp="2016-03-27T17:06:10.764+03:00">          <DesiredChildTag operation="delete">              <action startInstant="2016-03-30T08:35:00+03:00" id="244078"/>              <action startInstant="2016-03-29T08:35:00+03:00" id="244078"/>          </DesiredChildTag>          <DesiredChildTag operation="insert">              <action id="2" startInstant="2016-03-21T08:35:00+03:00"/>          </DesiredChildTag>          <DesiredChildTag operation="update">              <action id="222" startInstant="2016-03-21T08:35:00+03:00"/>              <action id="45" startInstant="2016-03-21T08:35:00+03:00"/>          </actions>      </DesiredParentTag>  </root>    

Desired XML OUTPUT:

      <DesiredParentTag UserName="admin" UserId="1" timestamp="2016-03-27T17:06:10.764+03:00">          <DesiredChildTag operation="delete">              <action startInstant="2016-03-30T08:35:00+03:00" id="244078"/>              <!--excluded duplicate id if operation='delete'-->          </DesiredChildTag>          <DesiredChildTag operation="insert">              <action id="2" startInstant="2016-03-21T08:35:00+03:00"/>          </DesiredChildTag>          <DesiredChildTag operation="update">              <action id="222" startInstant="2016-03-21T08:35:00+03:00"/>              <action id="45" startInstant="2016-03-21T08:35:00+03:00"/>          </actions>      </DesiredParentTag>    

I want to copy all that's under the "DesiredParentTag" and if the operation="delete" to exclude the action tags that have the same id. Everythhing else just regular copy.

My current xsl: (it copies the tags I need and the attributes but doesn't exlucude the duplicates if the attirbute operation='delete')

  <xsl:key name="ok" match="DesiredParentTag/DesiredChildTag/action" use="@id"/>  <xsl:template match="*">        <xsl:copy-of select="DesiredParentTag[count(key('ok',@id)[1]|.)=1]"/>    </xsl:template>    </xsl:stylesheet>