Changing the license: moving in opposite directions

It was an open secret in the BIMserver developing community, but now we are going public with this announcement: there are some license changes in the source code. The core and some serializers of are now Affero GPL licensed. Most projects stay in the GPLv3 license. There will be some binary builds that are dual licensed LGPL and Affero.

These changes are inherent to the changes in the structure of BIMserver. As most of you know our vision to is to create a stable, reliable but also open kernel to use in the AEC industry. By publishing the core under Affero license, the improvements are more likely to flow back into the project. On the other hand, the LGPL binaries lower the threshold to use the kernel in commercial software (beware, this only goes for the binaries).
For those of you who want details: the exact licenses are available in the source of the projects. And of course, all source code released prior to the change will always be available under the ‘old’ GPLv3 license. In case of doubt, feel free to ask your question on our support forum or e-mail to

Since the 1.0 release, most of our efforts have been on loosening the different modules. The core, GUI, IFCEngine and (de)serializers are now individual projects in the code repository. This makes way for extending by creating your own GUI or plugin.
Lots of programmers all over the world are developing serializers and new user interfaces for BIMserver at this moment. This also has an effect on the projects in the code repository. For example, bot the Cobie2Serializer and the O3D project have been removed from our project list. We focus on the BIMserver core and want to create the best BIMserver software with open interfaces to integrate and connect. Other projects and their programmers are working on much cooler COBie serializers and WebGL viewers than we could ever create. More on this later, but a sneak preview can be found on

The integration between software and other (open source) software initiatives is coordinated by the open source BIM network. This network now has 6 projects under its umbrella and has a strong focus on integrating (and accelerating) the open source BIM software efforts. Members of the team are also involved in the network.

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