Join / Data Merge

Converges control branches as a Join or combines compatible data inputs as a Data Merge.

When to use

Use Join when forward control branches must converge; use Data Merge when homogeneous data values need one combined output.

Example

Join two completed control branches before one Alert, or merge compatible data inputs for a downstream consumer.

Try it here

Explore Join / Data Merge

Converges control branches as a Join or combines compatible data inputs as a Data Merge.

Exercise steps

1. Switch the role from Join to Data merge.
2. Compare control arrivals with the data inputs and inspect validation.

Start lesson

Choose the right kind of merge

In Join role, bring two control branches into the node and continue from Merged after the configured join behavior. This answers “when may execution continue?” In Data Merge role, connect compatible data values to Inputs and consume the Merged Data collection. This answers “what values are grouped?” A Data Merge does not replace an Event Trigger, and a Join does not turn two unlike values into a single number. Choose Role before wiring ports, then inspect the active control and data connections because changing Role changes the meaning of the node.

Common problems

Choose the intended Role (Join or Data Merge) and connect homogeneous inputs. It cannot make incompatible types or graph cycles valid.

Next steps

Review the generated Parameters, Outcomes, and Data Ports on this page, then open the related guides for the complete workflow.