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It is also possible in a locationSet to link to time-dependent attributes. Time-dependent attributes need to be defined in a separate CSV/DBF file. In the locationSet use the attributeFile tag to make a reference to such a file. The following xml example has a reference to the file PumpStationsAttributes.dbf, which contains attributes that have different values for different periods in time, as well as different values for different locations. In this case the startDateTime and endDateTime tags are used to define the columns in the CSV/DBF file that contain the start and end dateTimes for each row. A given row in the CSV/DBF file contains values that are only valid between the time period for that row. This period is defined by the optional startDateTime and endDateTime for that row. If a row has no startDateTime, then it is valid always before the endDateTime. If a row has no endDateTime, then it is valid always after the startDateTime. If a row has no startDateTime and no endDateTime, then it is always valid. When Time-dependent attributes are change in time, make sure the startDateTime of one row is the same as the endDateTime of the previous row. If there is a gap of one day between the startDeteTime and the endDateTime, then there is a gap of one day for the validity of the location attributes.

<locationSet id="PumpStations">
  <esriShapeFile>
    <file>PumpStations</file>
    <geoDatum>WGS 1984</geoDatum>
    <id>%ID%</id>
    <name>%ID%</name>
    <x>%X%</x>
    <y>%Y%</y>
    <z>0</z>
    <attributeFile>
      <csvFile>PumpStationsAttributes.csv</csvFile>
      <id>%ID%</id>
      <timeZoneOffset>+05:00</timeZoneOffset>
      <dateTimePattern>dd-MM-yyyy HH:mm</dateTimePattern>
      <startDateTime>%START%</startDateTime>
      <endDateTime>%EIND%</endDateTime>
      <attribute id="speed">
        <number>%FREQ%</number>
      </attribute>
      <attribute id="discharge">
        <number>%POMPCAP%</number>
      </attribute>
    </attributeFile>
  </esriShapeFile>
</locationSet>

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