Esta es una plantilla completa de vistas en odoo, incluye: menu, tree view, form view, y sus respectivos actions

template_view.xml

<?xml version="1.0"?>
<odoo>
    <data>        
        <!-- TREE VIEW -->
        <record id="maintenance_order_tree" model="ir.ui.view">
            <field name="name">maintenance.order.tree</field>
            <field name="model">maintenance.order</field>
            <field name="arch" type="xml">
                <tree  string="maintenance_order"> <!-- decoration-info="state == 'draft'" decoration-muted="state == 'cancel'" -->
                    <field name="name"/>
                    <field name="observations"/>
                    <field name="trans_date"/>
                </tree>
            </field>
        </record>

        <!-- FROM VIEW -->
        <record id="maintenance_order_form" model="ir.ui.view">
            <field name="name">maintenance.order.form</field>
            <field name="model">maintenance.order</field>
            <field name="arch" type="xml">
                <form string="maintenance_order">
                <header>
                </header>

                <sheet string="maintenance_order">
                    <!-- <h1 class="mt0"> -->
    <!--                     <label string="Asset Return" attrs="{'invisible': [('maintenance_order_type','!=','asset_return')]}"/>
                        <label string="Asset Delivery" attrs="{'invisible': [('maintenance_order_type','!=','asset_delivery')]}"/>
                        <label string="Asset Transference" attrs="{'invisible': [('maintenance_order_type','!=','asset_transference')]}"/> -->
                        <!-- <field name="maintenance_order_type" invisible="1"/> -->
                        <!-- <field name="maintenance_order_type"/> -->
                    <!-- </h1> -->
                    <!-- <field name="maintenance_order_type"/> -->
                    <h1>
                        <field name="name"/>
                    </h1>
                    <group col="2">
                        <group>
                            <field name="trans_date"/>
                        </group>
                        <group>
                            <field name='analytic_tag_ids' widget="many2many_tags"/>
                        </group>
                    </group>

                    <!-- <notebook colspan="4">
                        <page string="maintenance_order">
                            <group>
                                <group string='Assignment and location that sends'>
                                    <field name="send_by_id"/>
                                    <field name="send_objective" domain="[('customer', '=', True)]"/>
                                    <field name="send_tag_ids" widget="many2many_tags"/>
                                </group>
                                <group string='Assignment and location that receives'>
                                    <field name="rec_by_id"/>
                                    <field name="rec_objective" domain="[('customer', '=', True)]"/>
                                    <field name="rec_tag_ids" widget="many2many_tags"/>
                                </group>
                            </group>

                        </page>
                        <page string="maintenance_order Info" name="other_info">
                            <group col="2">
                                <group>
                                    <field name="status"/>
                                    <field name="doc_serialnr"/>
                                </group>
                                <group>
                                    <field name="trans_date"/>
                                    <field name="cancellation_date"/>
                                </group>
                            </group>
                        </page>
                    </notebook> -->

                    <field name="observations" placeholder="Observations"/>
                </sheet>

                </form>
            </field>
        </record>


        <!-- VIEW ACTION -->
        <record id="vitt_action_maintenance_order" model="ir.actions.act_window">
            <field name="name">Maintenance Order</field>
            <field name="res_model">maintenance.order</field>
            <field name="view_type">form</field>
            <field name="view_mode">tree,form</field>
            <field eval="False" name="view_id"/>
            <!-- <field name="domain">[('maintenance_order_type','=','asset_delivery')]</field>
            <field name="context">{'maintenance_order_type': 'asset_delivery'}</field> -->
            <!-- <field name="search_view_id" ref="view_account_maintenance_order_filter"/> -->
            <field name="help" type="html">
            <p class="oe_view_nocontent_create">
                Click to record a new maintenance order.
            </p><p>
    <!--             You can control the maintenance_order from your vendor according to
                what you purchased or received. -->
            </p>
            </field>
        </record>

        <!-- TREE VIEW ACTION-->
        <record id="vitt_maintenance_order_tree_view" model="ir.actions.act_window.view">
            <field eval="1" name="sequence"/>
            <field name="view_mode">tree</field>
            <field name="view_id" ref="maintenance_order_tree"/>
            <field name="act_window_id" ref="vitt_action_maintenance_order"/>
        </record>

        <!-- FORM VIEW ACTION-->
        <record id="vitt_maintenance_order_form_view" model="ir.actions.act_window.view">
            <field eval="2" name="sequence"/>
            <field name="view_mode">form</field>
            <field name="view_id" ref="maintenance_order_form"/>
            <field name="act_window_id" ref="vitt_action_maintenance_order"/>
        </record>

        <!-- MENU -->
        <menuitem
            id="vitt_menu_vitt_maintenance_order_form"
            name="Maintenance Order"
            parent="maintenance.menu_m_request"
            action="vitt_action_maintenance_order"
            sequence="3"/>
            
    </data>
</odoo>