Several parallel branches of a process converge in a joining AND rule. The various branches start with a splitting AND rule and converge again with a joining AND rule.
This type of pattern is mapped to one splitting and one joining AND gateway in BPMN.
Branches that only contain events are grouped together in a single branch in the BPMN diagram. The conditions are combined in such a way that each condition generates a separate line in the Condition expression attribute of the connection.
The graphic displays an example with two branches, but any number of branches can be modeled.