pms/hotel_ine/views/inherited_hotel_room_view.xml

<?xml version="1.0"?>
<odoo>

    <record id="hotel_room_view_form" model="ir.ui.view">
        <field name="model">hotel.room</field>
        <field name="inherit_id" ref="hotel.hotel_room_view_form" />
        <field name="arch" type="xml">
            <xpath expr="//notebook" position="inside">
              <page string="I.N.E.">
                <group>
                    <field name="in_ine" colspan="2"/>
                </group>
              </page>
            </xpath>
        </field>
    </record>

</odoo>