<?xml version="1.0"?>
<data><xpath expr="//field[@name='notify']" position="after">
                    <field name="campaign_id" groups="mass_mailing.group_mass_mailing_campaign" attrs="{'invisible': [('composition_mode', '!=', 'mass_mail')]}"/>
                    <field name="mass_mailing_name" attrs="{'invisible': [('composition_mode', '!=', 'mass_mail')]}"/>
                </xpath>
                <xpath expr="//button[@name='action_send_mail'][not(hasclass('o_mail_send'))]" position="attributes">
                    <!-- 'Log' button -->
                    <attribute name="attrs">
                        {'invisible': [
                            '|',
                                ('is_log', '=', False),
                                '&amp;',
                                    ('mass_mailing_name', '!=', ''),
                                    ('mass_mailing_name', '!=', False)
                        ]}
                    </attribute>
                </xpath>
                <xpath expr="//button[hasclass('o_mail_send')]" position="attributes">
                    <!-- 'Send' button -->
                    <attribute name="attrs">
                        {'invisible': [
                            '|',
                                ('is_log', '=', True),
                                '&amp;',
                                    ('mass_mailing_name', '!=', ''),
                                    ('mass_mailing_name', '!=', False)
                        ]}
                    </attribute>
                </xpath>
                <xpath expr="//button[@name='action_send_mail']" position="after">
                    <button string="Send Mass Mailing" name="action_send_mail" type="object" class="btn-primary o_mail_send" attrs="{'invisible': ['|', ('mass_mailing_name', '==', ''), ('mass_mailing_name', '==', False)]}" data-hotkey="q"/>
                </xpath>
            </data>