A conditional sequence flow includes an expression that the Data Integration Service evaluates to true or false. The expression must return either a boolean or an integer value. If an expression returns an integer value, any non-zero value is the equivalent of true. A value of zero (0) is the equivalent of false.

If the expression evaluates to true, the Data Integration Service runs the next object. If the expression evaluates to false, the Data Integration Service does not run the next object. If you do not specify a condition in a sequence flow, the Data Integration Service runs the next object by default.

When an expression in a conditional sequence flow evaluates to false, the Data Integration Service does not run the next object or any of the subsequent objects in that branch. When you monitor the workflow, the Monitoring tool does not list objects that do not run in the workflow. When a workflow includes objects that do not run, the workflow can still complete successfully.

You cannot create a conditional sequence flow from the Start event to the next object in the workflow or from the last object in the workflow to the End event.