Pass the branch to the next person or agent to do their part, then hand it on again. Continue through as many steps as the work needs, including returning to an earlier participant for changes. Each contributor builds on the data, documents, and work already gathered there.
For example, an agent drafts a purchase order, the buyer checks quantities, and the supplier adds delivery terms. The branch can return to the supplier if a date needs changing.
Before publication, SHACL validation must pass and every party required by the workflow must sign off. A failed check or missing agreement keeps the proposal open.
There is no central approver bottleneck at every transition. Work passes directly to the next authorized participant; the process determines whose contribution and sign-off are needed. In the order example, the buyer and supplier agree the completed result.