Effects of the storage conditions on the stability of natural and synthetic cannabis in biological matrices for forensic toxicology analysis: An update from the literature
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Contributors' rights and obligations
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Using copyrighted work from others
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Never use materials that infringe the copyrights of others. This could create legal liabilities and seriously hurt Wikipedia. If in doubt, write the content yourself, thereby creating a new copyrighted work which can be included in Wikipedia without trouble.
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Linking to copyrighted works
Since most recently-created works are copyrighted, almost any Wikipedia article which cites its sources will link to copyrighted material. It is not necessary to obtain the permission of a copyright holder before linking to copyrighted material, just as an author of a book does not need permission to cite someone else's work in their bibliography. Likewise, Wikipedia is not restricted to linking only to CC BY-SA or open-source content.
However, if you know or reasonably suspect that an external Web site is carrying a work in violation of copyright, do not link to that copy of the work without the permission of the copyright holder. An example would be linking to a site hosting the lyrics of many popular songs without permission from their copyright holders. Knowingly and intentionally directing others to a site that violates copyright has been considered a form of contributory infringement in the United States (Intellectual Reserve v. Utah Lighthouse Ministry [1]); cf. GS Media v Sanoma for a landmark case in the European Union. Linking to a page that illegally distributes someone else's work sheds a bad light on Wikipedia and its editors.
The copyright status of web archives in the United States is unclear. On Wikipedia it is currently acceptable to link to archives such as the Wayback Machine, which host unmodified archived copies of webpages taken at various points in time.
In articles about a website, it is acceptable to include a link to that website even if there are possible copyright violations somewhere on the site.
Context is also important; it may be acceptable to link to a reputable website's review of a particular film, even if it presents a still from the film (such uses are generally either explicitly permitted by distributors or allowed under fair use). However, linking directly to the still of the film removes the context and the site's justification for permitted use or fair use.
Copyright violations
Contributors who repeatedly post copyrighted material despite appropriate warnings may be blocked from editing by any administrator to prevent further problems.
If you suspect a copyright violation, you should at least bring up the issue on that page's discussion page. Others can then examine the situation and take action if needed. Some cases will be false alarms. For example, text that can be found elsewhere on the Web that was in fact copied from Wikipedia in the first place is not a copyright violation on Wikipedia's part.
If a page contains material which infringes copyright, that material–and the whole page, if there is no other material present–should be removed. See Wikipedia:Copyright violations for more information, and Wikipedia:Copyright problems for detailed instructions.
Guidelines for images and other media files
Images, photographs, video and sound files, like written works, are subject to copyright. Someone holds the copyright unless the work has explicitly been placed in the public domain. Images, video and sound files on the internet need to be licensed directly from the copyright holder or someone able to license on their behalf. In some cases, fair use guidelines may allow them to be used irrespective of any copyright claims.
On Wikipedia, the use of media files is subject to the image use policy, and additionally the use of non-free content is governed by Wikipedia:Non-free content. Image description pages must be tagged with a special tag to indicate the legal status of the images, as described at Wikipedia:Image copyright tags. Untagged or incorrectly-tagged images may be deleted.
Questions about media copyright may be directed to Wikipedia:Media copyright questions, which is generally staffed by volunteers familiar with Wikipedia's media copyright guidelines and policies.
Governing copyright law
The Wikimedia Foundation is based in the United States and accordingly governed by United States copyright law. Regardless, according to Jimbo Wales, the co-founder of Wikipedia, Wikipedia contributors should respect the copyright law of other nations, even if these do not have official copyright relations with the United States.[2]
A brief summary of non-U.S. copyright laws, including guidelines on determining copyright status of the material in the United States, is available at Wikipedia:Non-U.S. copyrights.
Works by the United States Federal Government
Works produced by civilian and military employees of the United States federal government in the scope of their employment are public domain by statute in the United States (though they may be protected by copyright outside the U.S.). It is not enough that the employee was working at the time; he/she must have made the work as part of his/her duties (e.g. a soldier who takes a photograph with his/her personal camera while on patrol in Iraq owns the copyright to the photo, but it may find its way onto a unit webpage or otherwise be licensed to the government).
However, not every work republished by the U.S. government falls into this category. The U.S. government can own copyrights that are assigned to it by others–for example, works created by contractors.
United States Code; Title 17; Chapter 1; § 105 Subject matter of copyright; United States Government works. Copyright protection under this title is not available for any work of the United States Government, but the United States Government is not precluded from receiving and holding copyrights transferred to it by assignment, bequest, or otherwise.US Code
Moreover, images and other media found on .mil and .gov websites may be using commercial stock photography owned by others. It may be useful to check the privacy and security notice of the website, but only with an email to the webmaster can you be confident that an image is in the public domain.
Note that while the United States government does not claim copyright protection on its own works, governments outside the U.S. often do claim copyright over works produced by their employees. (For example, several Commonwealth realms utilize Crown copyright.)
Works by state governments of the United States
In contrast to the federal government, most state and local governments in the United States retain copyright to their employees' work. Such work is not in the public domain, so please make sure to check copyright information before using it.
Reusers' rights and obligations
The only Wikipedia content you should contact the Wikimedia Foundation about is the trademarked Wikipedia/Wikimedia logos, which are not freely usable without permission (members of the media, see Foundation:Press room, others see Wikipedia:Contact us). If you want to use other Wikipedia materials in your own books/articles/websites or other publications, you can do so, unless it is used under the non-free content provisions—but only in compliance with the licensing terms. Please follow the guidelines below:
Re-use of text
- Attribution
- To re-distribute text on Wikipedia in any form, provide credit to the authors either by including a) a hyperlink (where possible) or URL to the page or pages you are re-using, b) a hyperlink (where possible) or URL to an alternative, stable online copy which is freely accessible, which conforms with the license, and which provides credit to the authors in a manner equivalent to the credit given on this website, or c) a list of all authors. (Any list of authors may be filtered to exclude very small or irrelevant contributions.) This applies to text developed by the Wikipedia community. Text from external sources may attach additional attribution requirements to the work, which should be indicated on an article's face or on its talk page. For example, a page may have a banner or other notation indicating that some or all of its content was originally published somewhere else. Where such notations are visible in the page itself, they should generally be preserved by re-users.
- Copyleft/Share Alike
- If you make modifications or additions to the page you re-use, you must license them under the Creative Commons Attribution-ShareAlike 4.0 International License or later.
- Indicate changes
- If you make modifications or additions, you must indicate in a reasonable fashion that the original work has been modified. If you are re-using the page in a wiki, for example, indicating this in the page history is sufficient.
- Licensing notice
- Each copy or modified version that you distribute must include a licensing notice stating that the work is released under CC BY-SA and either a) a hyperlink or URL to the text of the license or b) a copy of the license. For this purpose, a suitable URL is: https://creativecommons.org/licenses/by-sa/4.0/
For further information, please refer to the legal code of the CC BY-SA License.
Additional availability of text under the GNU Free Documentation License
For compatibility reasons, any page which does not incorporate text that is exclusively available under CC BY-SA or a CC BY-SA-compatible license is also available under the terms of the GNU Free Documentation License. In order to determine whether a page is available under the GFDL, review the page footer, page history, and discussion page for attribution of single-licensed content that is not GFDL-compatible. Since all text published before June 15th, 2009 on Wikipedia was released under the GFDL, you can ensure GFDL compatibility by using the page history to retrieve content published before that date.
Re-use of non-text media
Where not otherwise noted, non-text media files are available under various free culture licenses, consistent with the Wikimedia Foundation Licensing Policy. Please view the media description page for details about the license of any specific media file.
Non-free materials and special requirements
Wikipedia articles may also include quotations, images, or other media under the U.S. Copyright law "fair use" doctrine in accordance with our guidelines for non-free content. In Wikipedia, such "fair use" material should be identified as from an external source by an appropriate method (on the image description page, or history page, as appropriate; quotations should be denoted with quotation marks or block quotation in accordance with Wikipedia's manual of style). This leads to possible restrictions on the use, outside of Wikipedia, of such "fair use" content retrieved from Wikipedia: this "fair use" content does not fall under the CC BY-SA or GFDL license as such, but under the "fair use" (or similar/different) regulations in the country where the media are retrieved.
Prior to June 15, 2009, Wikipedia did permit some text under licenses that were compatible with the GFDL but might require additional terms that were not required for original Wikipedia text (such as including Invariant Sections, Front-Cover Texts, or Back-Cover Texts). However, these materials could only be placed if the original copyright holders did not require that they be carried forward; for that reason, they impose no special burden for reuse.
Reusing text within Wikipedia
When you merge or split an article, or otherwise move text from one page to another within Wikipedia, the page history functionality cannot by itself determine where the content originally came from. This may violate the attribution clause of the project's licenses. If you are copying text within Wikipedia, you must at least put a link to the source page in an edit summary at the destination page. It is encouraged to do the same thing at the source page, and to add notices at the talk pages of both.
If you reuse text which you created yourself, the above may still be a good idea to avoid confusion, but it isn't mandatory.
If you are the owner of Wikipedia-hosted content being used without your permission
If you are the owner of content that is being used on Wikipedia without your permission, then you may request the page be immediately removed from Wikipedia; see Request for immediate removal of copyright violation. You can also contact our designated agent to have it permanently removed (but it may take up to a week for the page to be deleted that way). You may also blank the page and replace it with the words {{copyvio|URL or place you published the text}}
but the text will still be in the page history. Either way, we will, of course, need some evidence to support your claim of ownership.
Inversely, if you are the editor of a Wikipedia article and have found a copy hosted without following the licensing requirements for attribution, please see Wikipedia:Standard license violation letter.
See also
- Wikipedia:Copyright problems
- Wikipedia:Designated agent
- Wikipedia:Example requests for permission
- Wikipedia:FAQ/Contributing#Copyrights
- Wikipedia:FAQ/Copyright
- Wikipedia:File copyright tags
- Wikipedia:Freedom of panorama
- Wikipedia:Mirrors and forks
- Wikipedia:Non-free content
- Wikipedia:Non-U.S. copyrights
- Wikipedia:Plagiarism
- Wikipedia:Scanning an image does not make it your "own work"
- Wikipedia:Spotting possible copyright violations
- Wikipedia:Standard license violation letter
- Wikipedia:WikiProject Copyright Cleanup