In this guide you will learn how to use Sub Workflows in the PAK Editor.
Sub Workflows help to reduce redundancy in Workflows.
You can reuse them in other Workflows and thus, increase the readability of them.

To complete this guide you will need

By default, no Sub Workflows are stored.
In order to use specific Sub Workflows you have to add the corresponding repository that is of type „Workflows“ or „Commands & Workflows“.
How to add a Workflow repository is described in chapter BPMN Editor – Manage Available Commands and Workflows via Repositories.

You can also add a Workflow repository during the Sub Workflow adding. How to do so is described in the following.

In order to be able to use Sub Workflows open a new Workflow and select the „Sub Workflow“ element in the palette on the left side of the PAK Editor.

After adding the „Sub Workflow“ element, select it like shown in the figure below.
Now you can change the name of the element (2) and select the desired workflow (3).

In case no Workflow repository was added/selected in advance no workflows will show up.
But you can add them by clicking on „Add workflow repositories here“.
Further information about repository management can be found in chapter BPMN Editor – Manage Available Commands and Workflows via Repositories.

After enabling at least one repository that contains Workflows a list of all existing Workflows will be shown.
You can either search for a specific one in the free text field (1) or navigate through the tree (2).
In case you cannot find a specific Workflow it might be useful to reload the repository (3).

After you found your desired Workflow (1), click on it.
Another window will open up that shows the available versions for the Workflow.
To open a specific version you can either double click it (2) or select it and click on „Choose“ (3).

After selecting the correct version it will be displayed in the „Properties“ window of the Sub Workflow (1 & 2).

The Dataflow Analysis is also analysing the Sub Workflow and thus, e.g. missing input fields are displayed in the Dataflow Analysis tab of the PAK Editor(1).
Input fields of a Workflow that are usually filled by the Datastore must be given by the main Workflow when used as Sub Workflow.
Every key written by a Workflow represents the outputs of a Sub Workflow if used as such.

The usage of output variables can be handled in the Properties window of the Sub Workflow (2).
If an output field is checked it can be used in the Commands or Sub Workflows that are logically placed behind.

Constant and key mappings work analog to usual commands. For more information see the chapters How to Define and Use Basic Mappings and How Use Advanced Mappings (Interpolations).

In case the output is neither checked nor assigned in the key mapping, the output is ignored in the following procedure of the Workflow.

To open the content of a Sub Workflow double click on the element within your main Workflow.
The Sub Workflow will be opened in a new tab of the Editor and can be edit there.