CircuitsArchive:Copyrights - CircuitsArchive

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Important note: The Tecnick.com company does not own copyright on CircuitsArchive article texts and illustrations. It is therefore useless to email our contact addresses asking for permission to reproduce content. Permission to reproduce content under the license and technical conditions applicable to CircuitsArchive has already been granted to everyone without request; for permission to use it outside these terms, one must contact all the volunteer authors of the text or illustration in question.

The license CircuitsArchive uses grants free access to our content in the same sense as free software is licensed freely. This principle is known as copyleft. That is to say, CircuitsArchive content can be copied, modified, and redistributed so long as the new version grants the same freedoms to others and acknowledges the authors of the CircuitsArchive article used (a direct link back to the article satisfies our author credit requirement). CircuitsArchive articles therefore will remain free under the GFDL and can be used by anybody subject to certain restrictions, most of which serve to ensure that freedom.

To fulfill the above goals, the text contained in CircuitsArchive is copyrighted (automatically under the Berne Convention) by CircuitsArchive contributors and licensed to the public under the GNU Free Documentation License (GFDL).

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, with no Front-Cover Texts, and with no Back-Cover Texts.
Content on CircuitsArchive is covered by disclaimers.


The English text of the GFDL is the only legally binding document; what follows is our interpretation of the GFDL: the rights and obligations of users and contributors.


Contributors' rights and obligations

If you contribute material to CircuitsArchive, you thereby license it to the public under the GFDL (with no invariant sections, front-cover texts, or back-cover texts). In order to contribute, you must be in a position to grant this license, which means that either

  • you hold the copyright to the material, for instance because you produced it yourself, or
  • you acquired the material from a source that allows the licensing under GFDL, for instance because the material is in the public domain or is itself published under GFDL.

In the first case, you retain copyright to your materials. You can later republish and relicense them in any way you like. However, you can never retract the GFDL license for the copies of materials that you place here; these copies will remain under GFDL until they enter the public domain.

In the second case, if you incorporate external GFDL materials, as a requirement of the GFDL, you need to acknowledge the authorship and provide a link back to the network location of the original copy.

Using copyrighted work from others

All works are copyrighted unless either they fall into the public domain or their copyright is explicitly disclaimed. If you use part of a copyrighted work under "fair use", or if you obtain special permission to use a copyrighted work from the copyright holder under the terms of our license, you must make a note of that fact (along with names and dates). It is our goal to be able to freely redistribute as much of CircuitsArchive's material as possible, so original images and sound files licensed under the GFDL or in the public domain are greatly preferred to copyrighted media files used under fair use.

Never use materials that infringe the copyrights of others. This could create legal liabilities and seriously hurt the project. If in doubt, write it yourself.

Note that copyright law governs the creative expression of ideas, not the ideas or information themselves. Therefore, it is legal to read an encyclopedia article or other work, reformulate the concepts in your own words, and submit it to CircuitsArchive. However, it would still be unethical (but not illegal) to do so without citing the original as a reference.


Linking to copyrighted works

Since most recently-created works are copyrighted, almost any CircuitsArchive 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, CircuitsArchive is not restricted to linking only to GFDL-free or open-source content.

However, if you know that an external Web site is carrying a work in violation of the creator's copyright, do not link to that copy of the work. Linking to a page that illegally distributes someone else's work sheds a bad light on CircuitsArchive and its editors.

Copyright violations

Contributors who repeatedly post copyrighted material despite appropriate warnings may be blocked from editing to prevent further problems.

If you suspect a copyright violation, you should at least bring up the issue on that page's discussion section. 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 CircuitsArchive in the first place is not a copyright violation – at least not on CircuitsArchive'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.

Image guidelines

Images and photographs, like written works, are subject to copyright. Someone holds the copyright unless they have been explicitly placed in the public domain. Images 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 a photograph to be used.

Image description pages must be tagged with a special tag to indicate the legal status of the images. Untagged or incorrectly-tagged images will be deleted.

Introducing invariant sections or cover texts in CircuitsArchive

Under CircuitsArchive's current copyright conditions, and with the current facilities of the MediaWiki software, it is only possible to include in CircuitsArchive external GFDL materials that contain invariant sections or cover texts, if all of the following apply,

  1. You are the copyright holder of these external GFDL materials (or: you have the explicit, i.e. written, permission of the copyright holder to do what follows);
  2. The length and nature of these invariant sections and cover texts does not exceed what can be placed in an edit summary;
  3. You are satisfied that these invariant sections and cover texts are not listed elsewhere than in the "page history" of the page where these external materials are placed;
  4. You are satisfied that further copies of CircuitsArchive content are distributed under the standard GFDL application of "with no Invariant Sections, with no Front-Cover Texts, and with no Back-Cover Texts" (in other words, for the copies derived from CircuitsArchive, you agree that these parts of the text contributed by you will no longer be considered as "invariant sections" or "cover texts" in the GFDL sense);
  5. The original invariant sections and/or cover texts are contained in the edit summary of the edit with which you introduce the thus GFDLed materials in CircuitsArchive (so, that if "permanent deletion" would be applied to that edit, both the thus GFDLed material and its invariant sections and cover texts are jointly deleted).

Seen the stringent conditions above, it is very desirable to replace GFDL texts with invariant sections (or with cover texts) by original content without invariant sections (or cover texts) whenever possible.

Reusers' rights and obligations

If you want to use CircuitsArchive materials in your own books/articles/web sites or other publications, you can do so, but you have to follow the GFDL. If you are simply duplicating the CircuitsArchive article, you must follow section two of the GFDL on verbatim copying.

If you create a derivative version by changing or adding content, this entails the following:

  • your materials in turn have to be licensed under GFDL,
  • you must acknowledge the authorship of the article (section 4B), and
  • you must provide access to the "transparent copy" of the material (section 4J). (The "transparent copy" of a CircuitsArchive article is any of a number of formats available from us, including the wiki text, the html web pages, xml feed, etc.)

You may be able to partially fulfill the latter two obligations by providing a conspicuous direct link back to the CircuitsArchive article hosted on this website. You also need to provide access to a transparent copy of the new text. However, please note that the Wikimedia Foundation makes no guarantee to retain authorship information and a transparent copy of articles. Therefore, you are encouraged to provide this authorship information and a transparent copy with your derived works.

Example notice

An example notice, for an article that uses an CircuitsArchive article might read as follows:

This article is licensed under the GNU Free Documentation License. It uses material from the CircuitsArchive article "Article name".

("Article name" and the URLs enclosed in the above must of course be substituted as necessary.)

All (re-)distributed documents need to include a copy of the GFDL license text.

Fair use materials and special requirements

All original CircuitsArchive text is distributed under the GNU Free Documentation License (GFDL). CircuitsArchive articles may also include quotations, images, or other media under the "fair use" doctrine. It is preferred that these be obtained under the most free content license practical (such as the GFDL or public domain). In cases where no such images/sounds are currently available, then fair use may be used in certain circumstances.

In CircuitsArchive, such "fair use" material should be identified as from an external source (on the image description page, or history page, as appropriate). This also leads to possible restrictions on the use, outside of CircuitsArchive, of such "fair use" content retrieved from CircuitsArchive: this "fair use" content does not fall under the GFDL license as such, but under the "fair use" (or similar/different) regulations in the country where the media are retrieved.

CircuitsArchive does use some text under licenses that are compatible with the GFDL but may require additional terms that we do not require for original CircuitsArchive text (such as including Invariant Sections, Front-Cover Texts, or Back-Cover Texts). When wanting to contribute such texts that include Invariant Sections or Cover Texts to CircuitsArchive, see Introducing invariant sections or cover texts in CircuitsArchive above.

If you are the owner of CircuitsArchive-hosted content being used without your permission

If you are the owner of content that is being used on CircuitsArchive without your permission, then you may request the page be immediately removed from CircuitsArchive. You can Contact us to have it permanently removed. 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.

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