<?xml version="1.0"?>
<data>
                    <xpath expr="//group[@name='messaging']|//field[@name='signature']" position="before">
                        <group string="Discuss" name="discuss">
                            <field name="notification_type" widget="radio" invisible="share"/>
                            <field name="role_ids" widget="many2many_tags" readonly="not can_edit_role"/>
                        </group>
                    </xpath>
                    <field name="signature" position="attributes">
                        <attribute name="widget">html_mail</attribute>
                    </field>
                </data>
            