<field name="date"/>
<field name="date_due"/>
<filter string="Draft" domain="[('state','=','draft')]" help = "Draft Vouchers"/>
- <filter string="Pro-forma" domain="[('state','=','proforma')]" help = "Pro-forma Vouchers"/>
<filter string="Posted" name="current" domain="[('state','not in', ('draft','cancel'))]" help = "Validated Vouchers"/>
<field name="partner_id"/>
<group expand="0" string="Extended Filters...">