<?xml version="1.0"?>
<form string="Tracking Value">
                    <sheet>
                        <group name="field_details" string="Field details">
                            <field name="field_id"/>
                        </group>
                        <group name="values">
                            <group name="old_values" string="Old values">
                                <field name="old_value_integer"/>
                                <field name="old_value_float"/>
                                <field name="old_value_char"/>
                                <field name="old_value_text"/>
                                <field name="old_value_datetime"/>
                            </group>
                            <group name="new_values" string="New values">
                                <field name="new_value_integer"/>
                                <field name="new_value_float"/>
                                <field name="new_value_char"/>
                                <field name="new_value_text"/>
                                <field name="new_value_datetime"/>
                            </group>
                        </group>
                        <group string="Related Message">
                            <field name="mail_message_id"/>
                        </group>
                    </sheet>
                </form>
            