partner-contact/partner_contact_department/views/res_partner_department_view.xml

<?xml version="1.0" encoding="utf-8"?>

<flectra>

    <record id="res_partner_department_action" model="ir.actions.act_window">
        <field name="name">Departments</field>
        <field name="res_model">res.partner.department</field>
        <field name="view_type">form</field>
        <field name="view_mode">tree</field>
    </record>

    <record id="res_partner_department_tree_view" model="ir.ui.view">
        <field name="name">CRM department tree</field>
        <field name="model">res.partner.department</field>
        <field name="arch" type="xml">
            <tree string="Departments" editable="top">
                <field name="name"/>
                <field name="parent_id"/>
            </tree>
        </field>
    </record>

    <record id="res_partner_department_form_view" model="ir.ui.view">
        <field name="name">CRM department form</field>
        <field name="model">res.partner.department</field>
        <field name="arch" type="xml">
            <form>
                <group>
                    <field name="name"/>
                    <field name="parent_id"/>
                    <field name="child_ids"/>
                </group>
            </form>
        </field>
    </record>

    <menuitem action="res_partner_department_action"
              id="menu_res_partner_department"
              parent="contacts.res_partner_menu_config"/>

</flectra>