P6 EPPM Web Services is WS-I (Web Services Interoperability Organization) Basic Profile Version 1.1 compliant. For additional details about the WS-I Basic Profile Version 1.1, please refer to the WS-I web site at http://www.ws-i.org/. At the time of this writing, the Basic Profile Version 1.1 specification was available at http://www.ws-i.org/Profiles/BasicProfile-1.1-2004-08-24.html.