The image shows a box labeled BPEL Process on the left. This box has incoming and outgoing arrows on its right side that connect to a box labeled Workflow Services. This box includes the following subboxes: User Metadata Service, Identity Service, Task Metadata Service, Task Query Service, Task Assignment Service, and Notification Service. An incoming arrow on the right side of Workflow Services connects to Portal, Worklist, and E-mail Client users. Below Workflow Services is a database. To the right of the database is a box labeled Notification channels. Inside this box is a bullet list: E-mail and Application Server Wireless (with subbullets of Voice, SMS, Fax, and Pager). To the left of the database is a box labeled Identity Service. In side this box is a bullet list: OID, LDAP, and JAZN.