Is there any workflow built-in into knowledge document management? I can't seem to find it at knowledge -> documents -> document

e.g. if vendor login into internet portal and upload an invoice document into knowledge. Then it will auto escalate to business admin user.

When business admin user login into intranet portal, it will notify the business admin via a portlet or something.. then he will approve the document.

Can this be done in OpenERP 7.0 ? I know this can be done via Alfresco Share Document Library.