Participant Band
A Participant Band appears at the top or bottom of choreography elements, identifying the participants involved in that interaction and who initiates it.
What is a Participant Band?
A Participant Band identifies a participant at the top or bottom of choreography tasks and sub-choreographies. It shows who is involved in the interaction and distinguishes the initiator.
Visual Representation
Participant Bands appear as horizontal bands at the top and bottom of choreography elements. The initiating participant's band is shaded/filled, while the non-initiating band is unfilled.
Key Characteristics
- Participant identification: Shows who participates in the interaction
- Initiator marking: Shaded band indicates message sender
- Position significance: One band at top, one at bottom
- Multi-participant: More complex choreographies can have multiple bands
Common Use Cases
Buyer-Seller Interaction
Buyer (shaded, top) initiates order message to Seller (unfilled, bottom) in purchasing choreography.
Service Provider Response
Provider (shaded) sends service response to Consumer (unfilled) in service choreography.
Multi-Party Interaction
Show three participants in a sub-choreography with multiple participant bands.
Frequently Asked Questions
Related BPMN Elements
Try this element in Crismo
Create beautiful BPMN diagrams with our modern process modeling platform.