License

1. The most common open-source licenses are
2. licenses from Creative Commons (CC)
3. Patenting
4. Publication License

The most common open-source licenses are

1. GPL
2. WTFPL (Do What The Fuck You Want To Public License)

licenses from Creative Commons (CC)

1. CC BY (BY=attribution)- requires naming.
2. CC BY-SA (SA=Share Alike) - requires naming and sharing under equal conditions.
3. CC0 - no conditions or if possible, no copyright
4. CC BY-ND (ND=Non-Derivative) - requires naming and no editing. Disadvantages: No editing legally hinders users' creativity.
5. CC BY-NC (NC=Non-Commercial) - requires attribution and non-commercial use. Disadvantages: A non-commercial work may not be legally mixed with works under CC BY or CC BY-SA licenses!
   

Patenting

1. A documentation published under CC cannot be patented because it was published before.
2. However, you may patent your changes to the documentation if the license is not SA (Share Alike). If you want to make sure that the changes have to be published as Open Source, you should use the CC BY-SA license.

Publication License The documentation of the technology (a web page, an archive or a file) should say

1. Name of the license.
2. A link to the license web page.
3. Possibly also the content of the license