Part IV contains the following chapters:
Chapter 14, "Upgrading Oracle Internet Directory High Availability Environments"
Chapter 15, "Upgrading an Oracle Identity Management Cold Failover Cluster Environment"
Chapter 16, "Performing an Oracle Identity Management Multimaster and Fan-Out Replication Upgrade"
Chapter 17, "Upgrading an Oracle Virtual Directory High Availability Environment"
Chapter 18, "Upgrading an Oracle Identity Federation High Availability Environment"