pos/pos_order_pricelist_change/demo/demo.xml

<?xml version="1.0" encoding="UTF-8"?>
<!-- ********************************************************************** -->
<!--Point Of Sale - Order Pricelist Change for Odoo                         -->
<!--Copyright (C) 2014 GRAP (http://www.grap.coop)                          -->
<!--@author Sylvain LE GAL (https://twitter.com/legalsylvain)               -->

<!--This program is free software: you can redistribute it and/or modify    -->
<!--it under the terms of the GNU Affero General Public License as          -->
<!--published by the Free Software Foundation, either version 3 of the      -->
<!--License, or (at your option) any later version.                         -->

<!--This program is distributed in the hope that it will be useful,         -->
<!--but WITHOUT ANY WARRANTY; without even the implied warranty of          -->
<!--MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           -->
<!--GNU Affero General Public License for more details.                     -->

<!--You should have received a copy of the GNU Affero General Public License-->
<!--along with this program.  If not, see <http://www.gnu.org/licenses/>.   -->
<!-- ********************************************************************** -->
<openerp>
    <data noupdate="1">

        <!-- Price List -->
        <record id="pricelist_surcharge" model="product.pricelist">
            <field name="name">Surcharge Pricelist</field>
            <field name="type">sale</field>
        </record>
        <record id="pricelist_version_surcharge" model="product.pricelist.version">
            <field name="pricelist_id" ref="pricelist_surcharge"/>
            <field name="name">Surcharge Pricelist Version</field>
        </record>
        <record id="pricelist_item_surcharge" model="product.pricelist.item">
            <field name="price_version_id" ref="pricelist_version_surcharge"/>
            <field name="base" ref="product.list_price"/>
            <field name="price_surcharge">10</field>
            <field name="name">Surcharge Pricelist Line</field>
        </record>

        <!-- Partner -->
        <record id="partner_surcharge" model="res.partner">
            <field name="name">Surcharge Customer</field>
            <field name="customer" eval="True" />
            <field name="property_product_pricelist" eval="ref('pricelist_surcharge')" />
        </record>

    </data>
</openerp>