eiru_service_carworkshop/views/product_service.xml

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

        <!-- Form view -->

        <record model="ir.ui.view" id="product_service_form_inherit">
            <field name="name">product.service.form.inherit</field>
            <field name="model">product.service</field>
            <field name="inherit_id" ref="eiru_service.product_service_form"/>
            <field name="arch" type="xml">
                <xpath expr="//group[@string='Información legal']" position="inside">
                    <field name="policy" string="¿Tiene seguro?"/>
                    <field name="policy_number" string="Número de poliza" attrs="{'invisible': [('policy','=', False)],'required': [('policy','=', True)]}" domain="[('is_insurer','=',True)]"/>
                    <field name="secure_id" string="Aseguradora" attrs="{'invisible': [('policy','=', False)],'required': [('policy','=', True)]}" domain="[('is_insurer','=',True)]"/>
                    <field name="agent_id" string="Agente" attrs="{'invisible': [('policy','=', False)],'required': [('policy','=', True)]}" domain="[('is_agent','=', True),('parent_id','=', secure_id)]"/>
                </xpath>
                <xpath expr="//group[@string='Información Adicional']" position="inside">
                    <field name="odometer" string="Odometro"/>
                    <field name="transmission" string="Tipo de transmisión"/>
                    <field name="fuel_type" string="Tipo de combustible"/>
                    <field name="seats" string="Número de asientos"/>
                    <field name="doors" string="Número de puertas"/>
                    <field name="color" string="Color"/>
                </xpath>
            </field>
        </record>
    </data>
</openerp>