Flow Final

Once you get multiple tokens, as in an expansion region, you often get flows that stop even when the activity as a whole doesn't end. A flow final indicates the end of one particular flow, without terminating the whole activity.

Figure 11.11 shows this by modifying the example of Figure 11.9 to allow articles to be rejected. If an article is rejected, the token is destroyed by the flow final. Unlike an activity final, the rest of the activity can continue. This approach allows expansion regions to act as filters, whereby the output collection is smaller than the input collection.