purchase_view.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
  product_links_goodies for OpenERP
  Copyright (C) 2012 Akretion Sébastien BEAU <sebastien.beau@akretion.com>
  The licence is in the file __openerp__.py
-->

<openerp>
    <data>
        <!-- INHERITED VIEW FOR THE OBJECT : product_links -->

        <record id="purchase_order_line_form" model="ir.ui.view">
            <field name="name">product_links_goodies.purchase_order_line.form</field>
            <field name="model">purchase.order.line</field>
            <field name="inherit_id" ref="purchase.purchase_order_line_form" />
            <field eval="16" name="priority"/>
            <field name="type">form</field>
            <field name="arch" type="xml">
                <field name="price_unit" position="after">
                    <field name="goodie_for_line_id"/>
                </field>
            </field>
        </record>

    </data>
</openerp>