Welcome to the YAWL User Group website yaug.org! We would like to concentrate the know-how of all YAWL users and serve as a plattform for suggestions, discussions and collaboration. YAWL is an open source BPM/Workflow system currently developed by the YAWL Foundation.

Please join our community, if you would like to take part in the YAWL User Group. Please use the public forum to ask questions about YAWL or the user group itself. For any private inquiries use our contact form.

The final YAWL 3.0 Release is now available


YAWL 3.0 has just been released. There are a large number of improvements to the new process editor (over the 3.0beta release). The engine and services also have a number of improvements. The editor, YAWL engine and all services can now be auto-updated, too, so you will always have access to the latest builds of the entire YAWL system.

Documents in Workflows

Document handling in workflows is an important topic. Uploading and downloading documents - possibly from a document management system - is at the core of administrative activities. Fortunately, YAWL has a built-in datatype called YDocumentType for doing exactly that. So let us follow the section on document type of the YAWL user manual to see how it works.

We start the YAWL engine, open the YAWL editor, and add two tasks.


Where do YAWL Users come from?


A problem with open source software is that you never know exactly how many installations are out there. Our site yaug.org is still in its beginning and the absolute number of users is not overwhelming. But you have to account for the fact that YAWL is not a software for the end-user but a tool for process automation.

The first question is, where do YAWL users come from? You may find an answer to that question here. It contains the distribution of visits to the site yaug.org in 2013. All graphics come from our Piwik statistics.

Browser based YAWL Editor in Signavio


The web based editor for YAWL, a project that was started some time ago at Bonn-Rhein-Sieg University is now available here.

If you want to model processes using the YAWL notation, this gives you the possibility. The Signavio editor for YAWL does not have the functionality for automating processes. It is NOT meant as a replacement for the full YAWL editor that has just been released.

New YAWL Editor 3.0 (alpha) now available


The first stable YAWL Editor 3.0 (alpha) is now available: http://www.yawlfoundation.org/pages/resources/yawl3.html

Using a timer for the timeout of manual tasks

A common problem is the coordination of several parties. We want to give a number of participants the chance to comment on something but we do not want to wait indefinitely.
YAWL timer tasks can help here.

For the following workflow, we will be using the same ybkp file as here. The YAWL file is here.

Build a Workflow using Deferred Allocation

New YAC version

A new YAC version has been in development with the following main features:


Workflows for testing the YAWL Android Client

The YAWL Android Client has had several people, that added functionality and fixed bugs. I created three workflows that helped me find the flaws and bugs in the different YAC versions, which I am going to describe here. SInce those workflows were mainly used for debugging and had to be completed often, they run in a loop and repeat themselves as the standard control flow.

Test data types

The first workflow was created to test different data types in YAWL and how they are displayed:



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