product_view.xml

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

<!--
    Copyright (C) 2014-2015 Akretion (http://www.akretion.com/)
    @author Alexis de Lattre <alexis.delattre@akretion.com>
    The licence is in the file __openerp__.py
-->

<openerp>
<data>


<record id="product_normal_form_view" model="ir.ui.view">
    <field name="name">rental.product.product.form</field>
    <field name="model">product.product</field>
    <field name="inherit_id" ref="product.product_normal_form_view" />
    <field name="arch" type="xml">
        <notebook position="inside">
            <page name="rental" string="Rental">
                <group name="rental-service"
                    attrs="{'invisible': [('type', '!=', 'service')]}">
                    <field name="rented_product_id"/>
                </group>
                <group name="rental-product"
                    attrs="{'invisible': [('type', '=', 'service')]}"
                    string="Related Rental Services" col="1">
                    <field name="rental_service_ids" nolabel="1"/>
                    <button type="action"
                        name="%(create_rental_product_action)d"
                        string="Create Rental Service" />
                </group>
            </page>
        </notebook>
    </field>
</record>


</data>
</openerp>