Vinismo is written by its readers -- Internet users like you -- and we need your help! Try our getting started guide to learn how.
To enable collaboration between contributors, and to keep their contributions free for everyone to use, Vinismo content is released under a copyleft license called the Creative Commons Attribution-ShareAlike 2.5 License (sometimes called the by-sa license). Another, similar license, the GNU Free Documentation License (or GFDL), is used by other Free Content wikis such as Wikipedia to keep their content Free. Vinismo doesn't use the GFDL; see Why Vinismo isn't GFDL for details.
Some contributors may wish to release their contributions under another license (as well as the by-sa) such as the GFDL, in order to make their work accessible for these other sites (or for other reasons). This is called dual licensing. This page describes how to dual-license your work for Vinismo, as well as what the pitfalls of dual licensing can be. It's provided here as a service for those wine enthusiasts who insist on dual-licensing their work, and a clarification for other people who have to edit and modify that work.
NOTE: The contributors to this article are either a) not lawyers or b) not giving you legal advice. If you need legal advice on this issue, please contact a lawyer familiar with Free Content licensing issues.
edit Advantages of dual licensing
- You may have other personal reasons to be attached to the GFDL or other licenses.
- Dual licensing allows material to be shared between projects, that use different incompatible licenses. The creater of the original version can submit his work under different licenses to different projects. But for updates to flow between the different projects, dual licensing is necessary.
edit Limitations of dual licensing
The major problem with dual licensing is that it's confusing for readers, re-distributors, and other contributors. It makes them go read pages like this one to figure out what their rights and responsibilities are. Because it's confusing, it keeps us from working together on articles -- which is one of the main reasons we use a copyleft license in the first place!
edit Mechanics of dual licensing
The following describes the mechanics of dual licensing. It refers to the GFDL specifically, but much of the discussion would apply to any other license.
- It is possible for the original creator of a Work (that is, a Vinismo article, image, or other media object) to release that work under the by-sa license as well as another license such as the GFDL.
- A contributor making a Derived Work (editing or adding to the article, resizing or fixing up an image, etc.) must choose one of the licenses or both -- either the GFDL, the by-sa, or both. Because of limitations in our software, if that contributor chooses to use only the GFDL to create a derived work, it can't be uploaded to Vinismo. (We don't have a way to separate out content that's not available under the by-sa license. If we need it, we might add that "feature", but we don't have it yet.) So, if a contributor edits and saves an article in Vinismo, it is explicitly licensed under by-sa only, unless otherwise specified.
- Once a Work has been edited by another contributor who doesn't want to dual-license it, it is under the by-sa license only. Nobody -- not even the original Creator -- can create a derived work from it that is dual-licensed.
The upshot: work can be dual-licensed in Vinismo only if one person has worked on the article or image, and if all subsequent contributors have also chosen to dual-license it.
edit How to dual-license your original contributions to Vinismo
First, remember that dual-licensing is your choice as a contributor. You cannot expect other collaborators to keep an article or image dual-licensed.
If you have an article in Vinismo that is your original work, and that no one else has worked on, you can dual license it. Simply add the following codes in the description field when uploading an image:
- {{CC-BY-SA}}
- {{GFDL}}
Once another contributor edits the article without explicitly dual-licensing the update, its latest version is (as mentioned above) no longer available under the GFDL. If you wish, you can make a link on the Talk: page pointing to the last GFDL'd version. This is your responsibility.
edit How to dual-license existing articles
You can't dual-license a page that's already been edited by other people who didn't dual-license it. But if it's already been dual-licensed under the GFDL and by-sa 2.5, you can dual-license it under those two licenses. (It's not clear that you can dual-license it under other pairs of licenses, though.)
If you agree to keep a work dual-licensed, add a note on the talk page to that effect. If you don't, other editors can and should assume that you'd don't agree to the dual license, and will remove the dual-licensing statement.
edit Editing a dual-licensed article
If you edit an article or image that's dual-licensed, then please change the above license statement on the Talk: page to specify that only the older version(s) are dual-licensed.
edit Dual licensing of Images and other media
The rules are the same for images and text. However images are usually not edited by multiple authors and the current Vinismo software does not handle updating of images well.
If you want to dual-license images or other media so that they can be used with Vinismo and other projects, consider uploading a copy to commons.wikimedia.org and put the relevant licenses in the "Summary" field.
