partner_extra_data_basic/partner_extra_data_view.xml

<?xml version="1.0"?>
<openerp>
    <data>
        <record model="ir.ui.view" id="res_partner_ruc">
            <field name="name">res.partner.ruc</field>
            <field name="model">res.partner</field>
            <field name="inherit_id" ref="base.view_partner_form"/>
            <field name="arch" type="xml">
                <field name="function" position="before">
                    <field name="ruc" attrs="{'invisible':[('customer','=',False),('supplier','=',False)]}"/>
                    <field name="sexo" attrs="{'invisible':[('is_company','=',True)]}"/>
                    <field name="fecha_nac" attrs="{'invisible':[('is_company','=',True)]}" options="{'datepicker':{'yearRange': 'c-60:c+0'}}"/>
                    <field name="ubicacion" widget="url"/>
                </field>
                <button name="open_parent" position="replace">
                    <button name="open_parent" type="object" string="Editar Dirección" class="oe_link oe_edit_only" invisible="1"/>
                </button>
            </field>
        </record>
        <record id="res_partner_extra_data_search" model="ir.ui.view">
            <field name="name">res.partner.extra.data.search</field>
            <field name="model">res.partner</field>
            <field name="inherit_id" ref="base.view_res_partner_filter"/>
            <field name="arch" type="xml">
                <field name="name" position="before">
                    <field name="ruc" filter_domain="['|','|','|','|',('ruc','ilike',self),('name','ilike',self),('mobile','ilike',self),('phone','ilike',self),('email','ilike',self)]" string="general"/>
                </field>
            </field>
        </record>
    </data>
</openerp>