Commons:クレジット ライン

Shortcut：COM:CREDIT

Credit line（クレジットライン） もしくは attribution line（帰属欄）は、ライセンスが求める使用条件として、作品を利用する人すべてに作品に添えるよう作品の著者が求める情報を保持しています。具体的に言うと、広く用いられているCreative Commons CC-BYライセンスとGFDL ライセンスは、作品を使用する人すべてに著者を表示するよう求めています。

ここでは"credit line" という言葉を使っていますが、求められる帰属表示は、"credit line" に限定されませんし、これは指定された帰属表示フォーマットでもありません。 Although the term "credit line" is used here, the required attribution need not be specified as a credit line, neither is the format of the attribution specified.

Some works might have specific instructions from the author on how they would like their work to be attributed. Those requests must be honored, as long as they fall within what is required by the license, and should be honored, if reasonable, otherwise. If the author did not give explicit instructions, you must still attribute to the author and the minimal and suggested forms of attribution can be found below.

ライセンスで求めらるクレジットライン

クリエイティブ・コモンズ

CC-BY と CC-BY-SA のライセンス　

According to Creative Commons CC BY and CC BY-SA licenses, reusers must attribute the work by providing a credit line. Section 4b (Section 4c in CC BY-SA 3.0) of full license provides the details. Included below are the most relevant fragments:

If You Distribute [] the Work or any Adaptations or Collections, You must, unless a request has been made [not to], keep intact all copyright notices for the Work and provide, reasonable to the medium or means You are utilizing:

• (i) the name of the Original Author (or pseudonym, if applicable) if supplied, and/or if the Original Author and/or Licensor designate another party or parties (e.g., a sponsor institute, publishing entity, journal) for attribution ("Attribution Parties") in Licensor's copyright notice, terms of service or by other reasonable means, the name of such party or parties;
• (ii) the title of the Work if supplied;
• (iii) to the extent reasonably practicable, the URI, if any, that Licensor specifies to be associated with the Work, unless such URI does not refer to the copyright notice or licensing information for the Work;

In other words, unless author or licensor asks not to be credited, reusers distributing files found at Wikimedia Commons must provide credit line with license and author. Also author might request for credit line to include: other "Attribution Parties" (like Wikimedia Commons), URI (like web pages), or title. Reusers can choose format of the credit line "reasonable to the medium or means" as long as all required components are present. Example Credit lines in minimal format:

License	Author	Source	Credit line	Notes
{{cc-by-sa-3.0}}	John Doe	Own work	John Doe / CC-BY-SA-3.0	Minimum information required by the license for files without explicit Credit line field specified by the author
{{self|cc-by-sa-3.0|GFDL}}	John Doe	Own work	© John Doe / Wikimedia Commons / CC-BY-SA-3.0 / GFDL	Example credit line for dual license file with Wikimedia Commons as extra "Attribution Party"
{{cc-by-sa-3.0}}	User:Example	Own work	© User:Example / Wikimedia Commons / CC-BY-SA-3.0	Example credit line for users who do not provide their real names.
{{cc-by-sa-3.0}}	John Doe	Own work	© John Doe / http://example.com / CC-BY-SA-3.0	Example credit line with external website specified by the author.
{{cc-by-2.5}}	John Doe	Own work	Marble Lady by John Doe / CC-BY-2.5	Example credit line with title specified by the author.

CC-SA licenses

Note that attribution in accordance with best practices may be demanded by law in many European countries (cf "moral rights"), regardless of any general waivers such as CC-SA.

CC-PDのライセンス

CC Licenses not requiring attributions: {{Cc-zero}}. Please consider using an optional courtesy credit line.

Note that attribution in accordance with best practices may be demanded by law in many European countries (cf "moral rights"), regardless of any general waivers such as CC-zero.

Free Art License

The Free Art Licence considers it vital to announce the image is free and under a copyleft licence, which is linked to (or the URL spelled out in print). This is in addition to information on the author, the title of the work, the date of the work, any other authors contributing to the work and the location of the original work(s). The following format is required:

[Name of the author, title, date of the work. When applicable, names of authors of the common work and, if possible, where to find the originals].

Copyleft: This is a free work, you can copy, distribute, and modify it under the terms of the Free Art License

For example:

"Cherry Blossom Grove on the National Mall" © Vcelloho 2009. From Wikimedia Commons.

Copyleft: This is a free work, you can copy, distribute, and modify it under the terms of the Free Art License

GNU ライセンス

License	Author	Source	Credit line	Notes
{{self|cc-by-sa-3.0|GFDL}} {{GFDL|migration=relicense}}	John Doe	Own work	© John Doe / Wikimedia Commons / CC-BY-SA-3.0 / GFDL
{{GFDL}} only (now called {{GFDL|migration=opt-out}}) {{GFDL-1.2}}	John Doe	Own work	Copyright (c) John Doe. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled "GNU Free Documentation License".	You also have to include full text of the license.

礼儀的クレジットライン

パブリックドメインのメディアにcredit lineや帰属表示は求められません。しかしながら、再使用する人は 作者名を（もしわかれば）表示し、その作品がパブリックドメインでreleaseされたことを使用者に知らしめることが奨励されます（パブリックドメインの作品に著作権はありませんが、こうすることにより、 © マークの使用を防ぐべきです） 。下記は再利用者に奨励されるフォーマットです：

License	Author	Source	Credit line
{{PD-self}} {{PD-author}} {{PD-heirs}}	John Doe	Own work	John Doe / Wikimedia Commons / パブリック ドメイン
{{PD-old}}	John Doe	publication / self-scanned	John Doe / Public Domain
{{PD-self}}	[[user:JohnDoe]]	Own work	user:JohnDoe / Wikimedia Commons / Public Domain
{{anonymous-EU}} {{PD-anon-1923}} {{Anonymous work}}	匿名	publication	パブリック ドメイン
{{PD-textlogo}} {{Trademark}}	Acme Corp	publication	™ Acme Corp

再配布者による帰属の自動的な取り扱い / Automatic handling of attribution by reusers

API:Imageinfo does offer image license info with iiprop=extmetadata - see for example https://commons.wikimedia.org/w/api.php?action=query&titles=File:Gull%20portrait%20ca%20usa.jpg&prop=imageinfo&iiprop=metadata%7Ccommonmetadata%7Cextmetadata with useful data in Credit and AttributionRequired entries.

関連項目

• Commons:コピーライト・タグ
• Commons:ウィキメディア内のコンテンツを外部で再利用する
• Commons:Watermarks

• Attribution requirements for different versions of Cc licenses
• {{credit line}} - template to add credit line to your images