That was more of a "legal" assessment. In general content that does not appear to have a license is automatically owned by the creator. If the creator specifies a different license (like open source) then it will take on that lesser license.
The reason i say that the default license is *not* GPL is because I really have no experience yet with copyright of "documentation" or "written words", though I have researched open source licensing for software. Hence, I'm taking the opportunity to remain silent on the issue until I am a little bit more knowledgeable about the ramifications, lest I say something foolish that opens the door for something "bad" to happen

The Dataface software is fully open source under the GPL. This is not going to change. Now that you have raised the issue of documentation, I'll do some research and hopefully be able to give you a better response to the question of licensing.
Best regards
Steve