partner-contact/partner_relations/view/menu.xml

<openerp>
    <data>
        <act_window
            id="action_res_partner_relation_type"
            res_model="res.partner.relation.type"
            view_mode="tree,form"
            name="Partner relations"
        />
        <menuitem
            id="menu_res_partner_relation_type"
            parent="base.menu_config_address_book"
            action="action_res_partner_relation_type"
        />
    </data>
</openerp>