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 being 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.

YAWL User Group Forum replaces YAWL Foundation Forum

The YAWL User Group Forum on this site becomes the single forum for questions and support on YAWL and replaces the YAWL Foundation Forum. The content of the latter can still be retrieved here:

Thu, 06/22/2017 - 13:10

Creating and using Codelets

In this tutorial we show in three steps how to work with codelets in YAWL. We first create a codelet, install it and then invoke it from a YAWL workflow. We assume that you are familiar with

Mon, 02/20/2017 - 09:05

Stylesheet for removing double complete events in YAWL XES logs

YAWL creates XES logs directly from the control centre. This makes it easy to do Process Mining with tools like ProM,

Sat, 02/04/2017 - 16:34

Michael Adams on Worklets in YAWL

Dr. Michael Adams gave a talk in the Computer Science Colloquium at Bonn-Rhein-Sieg University.

Fri, 12/23/2016 - 14:43

Article on YAWL in iX has appeared

An article on YAWL has appeared in the German IT magazine iX:



Thu, 12/22/2016 - 09:12

Using Worklets and Exlets to reduce Workflow Complexity

In this tutorial we show how the complexity of the control flow can be reduced by using worklets and exlets in YAWL specifications.

Tue, 10/18/2016 - 15:51

YAWL Security Check

The control centre of YAWL has undergone a web application vulnerability check by CERT EU. YAWL version 4.1 has additional security features resulting

Sun, 08/07/2016 - 13:10

YAWL 4.0 is out!

YAWL 4.0 is now available here for download. One of the most prominent new features is a worklet and exlet editor. Worklets allow for so-called ad hoc

Mon, 04/25/2016 - 10:53

Reusing YAWL specifications as subworkflows (YAWL 4.0)

YAWL 4.0 features an integrated worklet editor that makes the work of  a previous tutorial much easier.

Sat, 04/23/2016 - 11:19

Better than BPMN

What is the most frequent requirement for a workflow system? Is it BPMN conformance? 

YAWL is not BPMN. We would like to make YAWL better than BPMN. Having fewer constructs with a similar

Sat, 03/26/2016 - 11:08