partner-contact/base_continent/views/country.xml

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

        <record id="view_country_tree_add_continent" model="ir.ui.view">
            <field name="name">res.country.tree.add_continent</field>
            <field name="model">res.country</field>
            <field name="inherit_id" ref="base.view_country_tree"/>
            <field name="arch" type="xml">
                <field name="code" position="after">
                    <field name="continent_id"/>
                </field>
            </field>
        </record>

        <record id="view_country_form_add_continent" model="ir.ui.view">
            <field name="name">res.country.form.add_continent</field>
            <field name="model">res.country</field>
            <field name="inherit_id" ref="base.view_country_form"/>
            <field name="arch" type="xml">
                <field name="code" position="after">
                    <field name="continent_id"/>
                </field>
            </field>
        </record>

  </data>
</openerp>