<?xml version="1.0"?>
<data><xpath expr="//field[@name='partner_id']" position="after">
                <field name="sale_order_id" string="Sale Order" filter_domain="['|', ('sale_order_id', 'ilike', self), ('sale_line_id', 'ilike', self)]"/>
            </xpath>
            <xpath expr="//search/group/filter[@name='customer']" position="after">
                <filter string="Sales Order Item" name="sale_line_id" context="{'group_by': 'sale_line_id'}"/>
            </xpath>
        </data>