account_invoice_sequence.xml

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

        <!-- Sequences is.account.folio -->
        <record id="seq_type_is_account_folio" model="ir.sequence.type">
            <field name="name">Folio</field>
            <field name="code">is.account.folio</field>
        </record>
        <record id="seq_is_account_folio" model="ir.sequence">
            <field name="name">Folio</field>
            <field name="code">is.account.folio</field>
            <field name="prefix"></field>
            <field name="padding">5</field>
            <field name="company_id" eval="False"/>
        </record>

        <record id="seq_type_is_demande_achat" model="ir.sequence.type">
            <field name="name">is demande achat</field>
            <field name="code">is.demande.achat</field>
        </record>
        <record id="seq_is_demande_achat" model="ir.sequence">
            <field name="name">is demande achat</field>
            <field name="code">is.demande.achat</field>
            <field name="prefix">DA-</field>
            <field name="padding">5</field>
            <field name="company_id" eval="False"/>
        </record>

        <record id="seq_type_is_facture_pk" model="ir.sequence.type">
            <field name="name">is facture pk</field>
            <field name="code">is.facture.pk</field>
        </record>
        <record id="seq_is_facture_pk" model="ir.sequence">
            <field name="name">is facture pk</field>
            <field name="code">is.facture.pk</field>
            <field name="prefix">PK-</field>
            <field name="padding">5</field>
            <field name="company_id" eval="False"/>
        </record>

    </data>
</openerp>