While it is variously referred to as branch, path, or variability identification, in all cases the test designer identifies the various ways the user or external system can execute the use case.

Typically, an XAResource is implemented by a resource manager and is used to support the external coordination of the resource manager's transaction branch.

ESATA External Serial ATA is a branch off of the Serial ATA interface that connects your hard drive to your computer if it was put together in the last couple of years.