COOWF@1.1:defjoinexpr

This expression calculates the join type of the activity. When an activity is completed the join type of the follower is evaluated to decide if all previous activities have to be completed before the follower is started or if previous activities are aborted if not completed. If no expression and no value in defjointype is defined all previous activities have to be completed before the follower is started.

The local scope of this expression contains the following values:
object: the object on which the process is running
process: the process instance object.
activity: the current activity instance which is checked in background
actinstprev: the previous instance elements


Explanation:
Defines an app.ducx expression that controls joining parallel process paths (see also defjoinexpr). The return value of the expression overrules the value defined in the Join of Predecessor Activities field.