Mike's Notes
Here are two different workflow languages that I haven't encountered before. I need to test these out because of the Pipi9 Workflow Engine.
Resources
- https://en.wikipedia.org/wiki/Common_Workflow_Language
- https://www.commonwl.org/
- https://www.infoq.com/news/2024/06/workflow-description-language/
- https://github.com/openwdl/wdl
References
- Reference
Repository
- Home > Ajabbi Research > Library >
- Home > Handbook >
Last Updated
18/05/2025
Article
By: Mike Peters
On a Sandy Beach: 05/08/2024
Mike is the inventor and architect of Pipi and the founder of Ajabbi.
The two languages
- Common Workflow Language (CWL)
- Workflow Description Language (WDL)
Common Workflow Language (CWL)
"The Common Workflow Language (CWL) is a standard for describing
computational data-analysis workflows.[1] Development of CWL is focused
particularly on serving the data-intensive sciences, such as
bioinformatics,[2] medical imaging, astronomy, physics, and
chemistry.
Standard
A key goal of the CWL is to allow the creation of a workflow that is
portable and thus may be run reproducibly in different computational
environments.[3]
The CWL originated from discussions in 2014 between Peter Amstutz, John
Chilton, Nebojša Tijanić, and Michael R. Crusoe (at that time their
respective affiliations were: Galaxy, Arvados, Seven Bridges, and Michigan
State University) at the Open Bioinformatics Foundation BOSC 2014
codefest..." - Wikipedia
Workflow Description Language (WDL)
"The Workflow Description Language (WDL) team has announced the release of
WDL 1.2.0, a significant update to improve workflow descriptions'
flexibility and usability in bioinformatics. This new version introduces
several key features and enhancements that promise to streamline workflow
management and execution, making it easier for developers and researchers to
implement and manage complex bioinformatics workflows.
The Workflow Description Language (WDL) is an open standard specification
for describing data processing workflows with a human-readable and
writeable syntax. WDL makes defining analysis tasks straightforward,
connecting them in workflows and parallelizing their execution. The
language strives to be accessible and understandable to all users,
including programmers, analysts, and production system operators.
One of the key improvements in WDL 1.2.0 is the introduction of the
Directory type. This new type allows workflows to handle directories more
effectively, enabling users to pass directories between tasks, which
simplifies the management of grouped data files. ..." - infoq
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