account_analytic_purchase_contract/view/account_purchase_contract_menu.xml

<?xml version="1.0" encoding="utf-8"?>
<openerp>
	<data>
      <record id="action_contract_purchase" model="ir.actions.act_window">
            <field name="name">Contract</field>
            <field name="res_model">account.analytic.account</field>
            <field name="view_type">form</field>
            <field name="view_mode">tree,form</field>
            <field name="view_id" ref=""/>
            <field name="search_view_id" ref=""/> 
            <field name="domain">[('type','=','purchase_contract')]</field>
            <field name="context">{'default_type':'purchase_contract','recurring_invoices':True}</field>
        </record>

    <record id="action_contract_purchase_tree" model="ir.actions.act_window.view">
            <field name="act_window_id" ref="action_contract_purchase"/>
            <field name="sequence">2</field>
            <field name="view_mode">tree</field>
            <field name="view_id" ref="view_purchase_contract_tree"/>
        </record>

    <record id="action_contract_purchase_form" model="ir.actions.act_window.view">
            <field name="act_window_id" ref="action_contract_purchase"/>
            <field name="sequence">6</field>
            <field name="view_mode">form</field>
            <field name="view_id" ref="view_purchase_contract_form"/>
        </record>
        
        <menuitem name="Contract" id="contract_purchase" parent="purchase.menu_procurement_management" action="action_contract_purchase" sequence="20"/>
	</data>
</openerp>