BPMN diagrams may include ARIS connections that are always visible (Message flow and Sequence flow) as well as ARIS connections that are never visible (belongs to and can trigger connections).
These constraints, which do not occur in ARIS Method, are automatically observed and enforced when modeling BPMN diagrams.
These constraints specify which conditions an ARIS connection must meet:
A connection must exist as a visible occurrence (in a message flow, regardless of whether or not message items occur between events, and in sequence flows or associations in BPMN and process schedule models only).
A connection may exist as a visible occurrence and is allowed in all embedded states (normal ARIS connections).
A connection may exist as a fully embedded occurrence only (belongs to connections, only in BPMN and process schedule models).
A connection may exist as a partly embedded occurrence only (can trigger connection) and can be created only if objects overlap. It cannot exist if an object is fully embedded in the wrapper object.
A connection may exist as an invisible occurrence only, but the objects have no embedded relationships (belongs to connection for a group object).
Connections that exist as an embedded occurrence only are not displayed when you manually create connections.