Inclusive Gateway

Fork: activates every outgoing flow whose condition evaluates to true — one or more branches run in parallel.

Join: waits for all activated branches to arrive before continuing. Unlike the parallel gateway, it only waits for the branches that were actually started.

Properties

Conditions are set on outgoing Sequence Flows using FEEL expressions (same syntax as Exclusive Gateway).

XML Example

<bpmn:inclusiveGateway id="check_flags" name="Route?"/>

<!-- Condition A: amount > 100 -->
<bpmn:sequenceFlow id="flow_to_a" sourceRef="check_flags" targetRef="path_a">
  <bpmn:conditionExpression>amount > 100</bpmn:conditionExpression>
</bpmn:sequenceFlow>

<!-- Condition B: status = "priority" -->
<bpmn:sequenceFlow id="flow_to_b" sourceRef="check_flags" targetRef="path_b">
  <bpmn:conditionExpression>status = "priority"</bpmn:conditionExpression>
</bpmn:sequenceFlow>

<!-- Join — waits for whichever branches ran -->
<bpmn:inclusiveGateway id="merge" name="Merge">
  <bpmn:incoming>from_a</bpmn:incoming>
  <bpmn:incoming>from_b</bpmn:incoming>
  <bpmn:outgoing>flow_after_merge</bpmn:outgoing>
</bpmn:inclusiveGateway>

In the example above:

• If amount = 150 and status = "priority", both branches activate and the join waits for both
• If amount = 50 and status = "priority", only Branch B activates and the join releases after Branch B
• If neither condition matches and there is no default, the engine throws an error

Default Flow

Leave one flow without a condition as a guaranteed fallback. At least one flow must match (or be the default) — the gateway cannot route to zero branches.

Condition Expressions

Same FEEL syntax as Exclusive Gateway:

amount > 1000
status = "priority"
tier = "gold" or amount > 500

Notes

• The join tracks exactly which branches were activated at the fork and only waits for those
• If the same inclusive gateway ID is used for both fork and join (uncommon), wiring must be unambiguous
• For exactly-one routing, use an Exclusive Gateway
• For always-all routing, use a Parallel Gateway