<?xml version="1.0"?>
<data><list position="attributes">
                <attribute name="delete">0</attribute>
                <attribute name="import">0</attribute>
            </list>
            <xpath expr="//field[@widget='res_partner_many2one']" position="attributes">
                <attribute name="widget">many2one</attribute>
            </xpath>
            <field name="user_ids" position="replace">
                <field name="portal_user_names" string="Assignees"/>
            </field>
            <xpath expr="//field[@name='milestone_id']" position="attributes">
                <attribute name="column_invisible">not context.get('allow_milestones', True)</attribute>
            </xpath>
            <field name="partner_id" position="attributes">
                <attribute name="column_invisible">0</attribute>
            </field>
        </data>