Task which contains array of references to other tasks.

The Parallel composite acts in a similar way to the Sequence composite. It has a set of child tasks, and it runs them until one of them fails. At that point, the Parallel task as a whole fails. If all of the child tasks complete successfully, the Parallel task returns with success. In this way, it is identical to the Sequence task and its non-deterministic variations. The difference is the way it runs those tasks. Rather than running them one at a time, it runs them all simultaneously. We can think of it as creating a bunch of new threads, one per child, and setting the child tasks off together.

task data of a parallel task.

The decision data.

Task which selects one of its children to be executed. If the chosen child finished execution, the task finishes.

Task data.

The decision data.

Task which executes its children one after another. The task finishes when all children finished.

Task data.