This is the home of the Open Book Freedom License.
The Open Book Freedom License is the world's most libre license.
The license is currently in development, and is at version 0.
"Open Book" is defined as compiling all materials related to bringing an idea from conception to reality into an actual Book (an electronic Book). This includes but is not limited to all research, any apparatus required to replicate the research, the data collected from the research, the interpretations of the research, the opinions of the researchers, any plans and details required to build any apparatus, including prototypes, any source codes required to run testing and prototype apparatus and the final product. The spirit of whether or not something should be included in the Book, should be along the lines of "If the world ended, and nobody was left except qualified engineers who knew nothing of the specifics of the product, would they be able to replicate the research, build the product, and understand how it works?" Keeping this in mind, you should still err on the side of caution, and include something if you think it is at all relevant.