flectra/addons/purchase/data/purchase_data.xml

<?xml version="1.0" encoding="utf-8"?>
<flectra>
    <data noupdate="1">

        <record id="req_link_purchase_order" model="res.request.link">
            <field name="name">Purchase Order</field>
            <field name="object">purchase.order</field>
        </record>

        <!-- Purchase-related subtypes for messaging / Chatter -->
        <record id="mt_rfq_confirmed" model="mail.message.subtype">
            <field name="name">RFQ Confirmed</field>
            <field name="default" eval="False"/>
            <field name="res_model">purchase.order</field>
        </record>
        <record id="mt_rfq_approved" model="mail.message.subtype">
            <field name="name">RFQ Approved</field>
            <field name="default" eval="False"/>
            <field name="res_model">purchase.order</field>
        </record>
        <record id="mt_rfq_done" model="mail.message.subtype">
            <field name="name">RFQ Done</field>
            <field name="default" eval="False"/>
            <field name="res_model">purchase.order</field>
        </record>

        <!--
             Procurement rules and routes
        -->

        <record id="route_warehouse0_buy" model='stock.location.route'>
            <field name="name">Buy</field>
            <field name="company_id"></field>
            <field name="sequence">5</field>
        </record>

        <!-- Sequences for purchase.order --> 
        <record id="seq_purchase_order" model="ir.sequence">
            <field name="name">Purchase Order</field>
            <field name="code">purchase.order</field>
            <field name="prefix">PO</field>
            <field name="padding">5</field>
            <field name="company_id" eval="False"/>
        </record>
    </data>
</flectra>