Unified Archive, or UAR, is a new feature in Oracle Solaris 11.2. You can use UAR to take an image of an existing system, then use that image for provisioning. Folks have been asking about support for UAR in Ops Center since last year, so we made it a part of Ops Center 12.3.1.
You can import UAR images into Ops Center and provision operating systems, LDoms, and global zones from them, using Ops Center 12.3.1. This procedure explains how to do it, and goes over the prereqs.
Take a look at the What's New to learn more about the other new features in 12.3.1.