<odoo>

    <record id="purchase_order_form_backorder" model="ir.ui.view">
        <field name="name">purchase.order.form.backorder</field>
        <field name="model">purchase.order</field>
        <field name="inherit_id" ref="purchase.purchase_order_form" />
        <field name="arch" type="xml">
            <xpath expr="//field[@name='partner_ref']" position="after">
                <field name="uigr_value" readonly='1' />
                <field name="bo_value" readonly='1' />
                <field name="last_bill_date" readonly='1' />
                <field name="last_date_received" readonly='1' />
            </xpath>
        </field>
    </record>

</odoo>
