<oadr:oadrReportRequest>
  <ei:reportRequestID>{{ report_request.report_request_id }}</ei:reportRequestID>
  <ei:reportSpecifier xmlns:xcal="urn:ietf:params:xml:ns:icalendar-2.0">
    <ei:reportSpecifierID>{{ report_request.report_specifier.report_specifier_id }}</ei:reportSpecifierID>
    <xcal:granularity>
      <xcal:duration>{{ report_request.report_specifier.granularity|timedeltaformat }}</xcal:duration>
    </xcal:granularity>
    {% if report_request.report_specifier.report_back_duration is defined and report_request.report_specifier.report_back_duration is not none %}
    <ei:reportBackDuration>
      <xcal:duration>{{ report_request.report_specifier.report_back_duration|timedeltaformat }}</xcal:duration>
    </ei:reportBackDuration>
    {% endif %}
    {% if report_request.report_specifier.report_interval is defined and report_request.report_specifier.report_interval is not none %}
    <ei:reportInterval>
      <xcal:properties>
        <xcal:dtstart>
          <xcal:date-time>{{ report_request.report_specifier.report_interval.dtstart|datetimeformat }}</xcal:date-time>
        </xcal:dtstart>
        <xcal:duration>
          <xcal:duration>{{ report_request.report_specifier.report_interval.duration|timedeltaformat }}</xcal:duration>
        </xcal:duration>
      </xcal:properties>
    </ei:reportInterval>
    {% endif %}
    {% for specifier_payload in report_request.report_specifier.specifier_payloads %}
    <ei:specifierPayload>
      <ei:rID>{{ specifier_payload.r_id }}</ei:rID>
      <ei:readingType>{{ specifier_payload.reading_type }}</ei:readingType>
    </ei:specifierPayload>
    {% endfor %}
  </ei:reportSpecifier>
</oadr:oadrReportRequest>