Gateways of the XOR (data-based) type: For all outgoing connections of an XOR (data-based) gateway, the value Expression must be set for the Condition attribute, and a valid expression must be used for the Condition expression attribute.

For every XOR gateway of the XOR (data-based) type, the Default gateway attribute should be specified for exactly one outgoing sequence flow connection (activates connection type). Under no circumstances must multiple outgoing connections be marked with this attribute.

For each XOR gateway of the XOR (event-based) type there must be at least two outgoing sequence flow connections (activates or leads to type).

For all outgoing connections of an event-based XOR gateway, no value must be specified for the Condition attribute. The Condition expression attribute should not be specified.

The following target objects are permitted for outgoing sequence flow connections of an event-based XOR gateway:

Functions for which the Receive task type was set.

Intermediate events whose Event type attribute type has a value other than Compensation or Multiple.

If there is a function in the set of target objects, this set must not contain an event of the Message type.

If a gateway of the OR type has no or exactly one incoming sequence flow connection, there must be at least two outgoing sequence flow connections.

For all outgoing sequence flow connections of an OR gateway, the value Expression must be set for the Condition attribute, and a valid expression must be used for the Condition expression attribute. The expression must unambiguously relate to the current gateway.

If an OR gateway has exactly one outgoing sequence flow connection, no value must be specified for the Condition attribute of this connection.

If a gateway of the Complex type has no or exactly one incoming sequence flow connection, there must be at least two outgoing sequence flow connections.

For all outgoing connections of a complex gateway, the value None must be specified for the Condition attribute, especially if there is only one outgoing connection.

If a complex gateway has multiple incoming sequence flow connections, a condition that references the sequence flow names and process properties (data) must be specified for the Incoming condition attribute.

If a complex gateway has multiple outgoing sequence flow connections, a condition that references the sequence flow names and process properties (data) must be specified for the Outgoing condition attribute.

If an AND gateway has no or exactly one incoming sequence flow connection, there must be at least two outgoing sequence flow connections.

For all outgoing sequence flow connections of an AND gateway, no value must be specified for the Condition attribute.