<?xml version="1.0"?>
<pivot string="Operations" sample="1">
                <field name="date_start"/>
                <field name="operation_id"/>
                <field name="duration" type="measure" string="Duration (minutes)" widget="float_time"/>
                <field name="duration_unit" type="measure" widget="float_time"/>
                <field name="duration_expected" type="measure" widget="float_time"/>
            </pivot>
        