Help:Copyright tags

When you upload a file, you are encouraged to indicate its license status.

Depending on what license you choose using the license selector in the upload form, a so-called copyright tag is inserted into the resulting description page, such as {{cc-by-3.0}}. This will display license information on the description page, and categorize the file accordingly. You can also insert any of these tags manually into the upload summary. The tags can be viewed and edited at [[Template:Tag name]], e.g. Template:cc-by-3.0 for {{cc-by-3.0}}.

All tags are listed in Category:License templates.

Public domain

• {{PD-self}} – for works released into the public domain by their creator who is also the uploader.
• {{PD-user|username}} – for works released into the public domain by their creators when the creators are FlightGear wiki users.
• {{PD-author}} – for works released into the public domain by non-FlightGear wiki users. Some further explanation should be given such as a link to the author's website where they explicitly state that they release the work into the public domain (e.g. {{PD-author|[http://www.sitename.com author]}}).

GNU Licenses

• {{GFDL}} - GNU Free Documentation License
• {{GPL}} - GNU General Public License; Note: do not use this as the only license for your work if you can avoid it. The GPL is intended for computer programs, not for media files.
• {{LGPL}} - GNU Lesser General Public License; Note: do not use this as the only license for your work if you can avoid it. The LGPL is intended for computer programs, not for media files.

Please note: The GFDL is rather impractical for images and short texts, because it requires the full text of the GFDL to be published along with the image. This is prohibitive for print media: in order to use a single image in a newspaper, a full page containing the GFDL would have to be printed. To resolve this, please dual-license your work under GFDL and an equivalent Creative Commons license like CC-by-sa-3.0 (see below). This helps to make your work usable not only freely, but also easily.

Free Creative Commons licenses

• {{cc-by-3.0}} - Attribution 3.0
• {{cc-by-sa-3.0}} - Attribution-Sharealike 3.0

• {{cc-by-sa-3.0,2.5,2.0,1.0}} to multilicense as cc-by-sa-3.0, cc-by-sa-2.5, cc-by-sa-2.0, and cc-by-sa-1.0.

Old Creative Commons licenses

The following licenses have been superseded by more recent versions. They are still available for use.

• {{cc-by-1.0}} - Attribution