Dezyne 2.16.0 released.

August 18, 2022

We are happy to announce Dezyne 2.16 which introduces the defer keyword: A new language concept for implementing an asynchronous interface. With defer, the basic semantics are complete.

Defer replaces dzn.async ports feature that cannot be used in systems collateral blocking. The use of dzn.async ports is now deprecated.

Also new in this release: Cleanups to the code generators and model to model transformations.

See also the Dezyne documentation.

We will evaluate your reports and track them via the Gitlab dezyne-issues project, see our guide to writing helpful bug reports.

What's next?

In the next releases we like to see implicit interface constraints, shared interface state and verification with system scope for automatically exploring possible traces in a system.


Looking beyond the next releases: Module-specifications and data-interfaces. Hierarchical behaviors.

The Dezyne developers.


git clone git://

Here are the compressed sources and a GPG detached signature[*]:

Here are the SHA1 and SHA256 checksums:

91e8d61cdd9333edbd2768c26c187c35ba7e8a6c  dezyne-2.16.0.tar.gz  
6d41b2e671afc629610de8f7ed48dd1799bae08b17bd9455a3b9b684f69524f4  dezyne-2.16.0.tar.gz

[*] Use a .sig file to verify that the corresponding file (without the .sig suffix) is intact. First, be sure to download both the .sig file and the corresponding tarball. Then, run a command like this:

gpg --verify .sig

If that command fails because you don't have the required public key, then run this command to import it:

gpg --keyserver --recv-keys 1A858392E331EAFDB8C27FFBF3C1A0D9C1D65273

and rerun the gpg --verify command.

Alternatively, Dezyne can be installed using GNU Guix:

guix pull  
guix install dezyne


Changes in 2.16.0 since 2.15.4

About Dezyne

Dezyne is a programming language and a set of tools to specify, validate, verify, simulate, document, and implement concurrent control software for embedded and cyber-physical systems.

The Dezyne language has formal semantics expressed in mCRL2 developed at the department of Mathematics and Computer Science of the Eindhoven University of Technology (TUE). Dezyne requires that every model is finite, deterministic and free of deadlocks, livelocks, and contract violations. This achieved by means of the language itself as well as builtin verification through model checking. This allows the construction of complex systems by assembling independently verified components.

Dezyne is free software, it is distributed under the terms of the GNU Affero General Public Licence version 3 or later.

About Verum

Verum, the organization behind the Dezyne language, is committed to continuing to invest in the language for the benefit of all its users. Verum assists its customers and partners in solving the software challenges of today and tomorrow, by offering expert consultancy on the application of the Dezyne language and the development and use of its tools, as well as on Verum's commercial tools like Verum-Dezyne's IDE support based on the LSP (Language Server Protocol), interactive integrated graphics, interactive simulation, (custom) code generation and (custom) runtime library support.