52.22.3 Parallel
This activity splits the workflow unconditionally into two or more branches. There is no hard limit on the number of branches. A device can participate in more than one branch, provided that the device supports concurrent execution of the services involved (or several sessions using the same service).
Each of the parallel branches is encapsulated within a "Sequence" activity.
This activity has no unique properties.
For usage examples, see section "Parallel Activities".