For contributing to the Yake project there are two things to consider:

1. Multi-license Usage

The contributing individual or organization should issue their contributions for inclusion within the Yake technology base using the dual-license mechanism of LGPL + Yake JCA, without modification to the license terms and conditions. Contributions that cannot be made available under this dual-licensing mechanism will be incompatible and thus cannot be incorporated into the Yake technology base.

2. Copyright Assignment

To enable the Yake Team to effectively provide license management, enforce legal compliance, and issue technology adequately to commercial licensees, all contributions being made for inclusion in the Yake technology base must make a copyright assignment of the source code to the Yake Team represented by its project leader Stephan Kaiser.

This follows principals as recommended by the Free Software Foundation regarding copyright assignment for contributions to the GNU Project.

Copyright assignment is a common requirement within open source projects for legal indemnification management and for flexibility of second licensing.