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    <PortDetails>
      <PortType>A</PortType>
...
      <PortCode>USMIA</PortCode>
      <ETD>2016-10-13</ETD>
    </PortDetails>

    <RoutingDetails>
      <StageQualifier>1</StageQualifier> (If PortType is A)
...
      <Destination>ESBCN</Destination> (If PortType is L)
      <ETA>2017-01-20</ETA> (If PortType is L)
    </RoutingDetails>

<xsl:for-each select="ScheduleDetails/PortDetails">

...
</xsl:when>
</xsl:choose>
</xsl:for-each>

    <RoutingDetails>
      <StageQualifier>1</StageQualifier>
...
      <Destination>USMIA</Destination>
      <ETA>2016-10-13</ETA>
    </RoutingDetails>