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CZ:About Media Hosted at Citizendium

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For the purposes of this document, "media" is defined as all digital image, audio, and video materials.

The Citizendium has taken very careful measures to document all media on its site to standards that are unparalleled among similar sites. Even so, there are several things you ought to keep in mind. The following is intended to offer some helpful, albeit non-legal guidance on reusing media hosted on our project.

Despite the very best efforts of Citizendium and its contributors as an intermediary party, the ultimate burden of determining a media's origin and status rests solely with the re-user.

Overview of how we document

Citizendium attempts to display on its media pages the following information, so as to assist you in determining whether you can pursue reusing media we host:

  • An accurate description of the media.
  • The precise source of the image at the time of uploading, usually as a web-link and sometimes as a citation in a paper publication or library call number.
  • Precise data about the copyright/licensing/usages and re-usages status at the time of uploading.
  • A real-named author or entity-author of the media. Except for historical materials where the author is not known, the Citizendium does not normally host media attributed to anonymous or pseudonymous authors. Despite our good faith efforts, some apparent real names attached to especially media obtained from outside sources may, in fact, have only the appearance of a real name.
  • The publisher or party responsible for providing the media to Citizendium, if different from the author or entity-author.
  • A way to contact whoever possesses legal rights or claimed rights to the media.

Overview of how we tag media

As part of how the Citizendium documents media, it displays various rectangular licensing/copyright tags, called templates, on the main page for each media. While there are many individual licensing/copyright tags, we have organized each of them according to three basic categories.

Templates with green backgrounds are used to tag media considered "High-free" — media under varied licenses that allow both derivatives and commercial usages.
Templates with yellow backgrounds are used to tag media considered "Intermediate-free" — media under varied licenses that in some way restrict either or both derivatives and commercial usages.
Templates with red backgrounds are used to tag media considered "Non-free" — media that is generally copyrighted and used by permission and that in some way restrict usages inside and/or outside of the Citizendium.


Within each of these categories are various "families" of licenses/copyright statuses, as well. The simple red-yellow-green backgrounds assigned to each gives you a quick, basic idea about the potential range of reuses, or lack of them, available for the specific media.

NOTE: As the color implies, media tagged with templates featuring a red background are not intended for any type of redistribution. They are hosted on Citizendium solely for use in our articles as hosted at the Citizendium website.

ALSO NOTE: Media tagged with templates featuring yellow backgrounds cannot be used commercially or to make derivative works along with Citizendium text. This means that those who reuse Citizendium text commercially cannot use media tagged with any license or terms featuring a yellow background.

Media may also be tagged with important notices that are unrelated to copyright.

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