卡塔尔vs葡萄牙分析知识共享许可协议为从个人创作者到大型机构的每个人提供了一种标准化的方式，在版权法下允许公众使用他们的创作作品。From the reuser’s perspective, the presence of a Creative Commons license on a copyrighted work answers the question,“What can I do with this work?”
The Creative Commons License Options
There are six different license types, listed from most to least permissive here:
CC BY:该许可允许重用者以任何媒介或格式分发、混音、改编和构建材料，只要将其归属于创建者。该许可证允许商业使用。
CC BY includes the following elements:
BY
– Credit must be given to the creator
CC BY-SA: This license allows reusers to distribute, remix, adapt, and build upon the material in any medium or format, so long as attribution is given to the creator. The license allows for commercial use. If you remix, adapt, or build upon the material, you must license the modified material under identical terms.
CC BY-SA includes the following elements:
BY– Credit must be given to the creator
SA
– Adaptations must be shared under the same terms
CC BY-NC:本许可允许重用者以任何媒介或格式发布、重新混音、改编和构建材料，仅用于非商业目的，且仅在归属于创作者的情况下。
It includes the following elements:
BY– Credit must be given to the creator
NC
– Only noncommercial uses of the work are permitted
CC BY-NC-SA:本许可允许重用者以任何媒介或格式发布、重新混音、改编和构建材料，仅用于非商业目的，且仅在归属于创作者的情况下。如果您在材料的基础上重新混合、改编或构建，您必须在相同的条款下许可修改后的材料。
CC BY-NC-SA includes the following elements:
BY– Credit must be given to the creator
NC– Only noncommercial uses of the work are permitted
SA– Adaptations must be shared under the same terms
CC BY-ND: This license allows reusers to copy and distribute the material in any medium or format in unadapted form only, and only so long as attribution is given to the creator. The license allows for commercial use.
CC BY-ND includes the following elements:
BY– Credit must be given to the creator
ND
– No derivatives or adaptations of the work are permitted
CC BY-NC-ND: This license allows reusers to copy and distribute the material in any medium or format in unadapted form only, for noncommercial purposes only, and only so long as attribution is given to the creator.
CC BY-NC-ND includes the following elements:
BY– Credit must be given to the creator
NC– Only noncommercial uses of the work are permitted
ND– No derivatives or adaptations of the work are permitted
The Creative Commons Public Domain Dedication
CC0(akaCC Zero) is a public dedication tool, which allows creators to give up their copyright and put their works into the worldwide public domain. CC0 allows reusers to distribute, remix, adapt, and build upon the material in any medium or format, with no conditions.
Choosing a License
The six licenses and the public domain dedication tool give creators a range of options. The best way to decide which is appropriate for you is to think about why you want to share your work, and how you hope others will use that work.
For help, try theCreative Commons License Chooser.
Before Licensing
Before you apply a CC license or CC0 to your work, there are some important things to consider:
The licenses and CC0 cannot be revoked.This meansonce you apply a CC license to your material, anyone who receives it may rely on that license for as long as the material is protected by copyright, even if you later stop distributing it.
You must own or control copyright in the work.Only the copyright holder or someone with express permission from the copyright holder can apply a CC license or CC0 to a copyrighted work. If you created a work in the scope of your job, you may not be the holder of the copyright.
Seethis page for more pre-licensing considerations.
How to apply a CC license or CC0 to your work
CC-licensing your work is simple. All you have to do is choose the CC license that suits your needs and then communicate this choice in a way that will be clear to people who come across your work. As part of this communication, you should include a link to the license you’ve chosen.
This can be as simple as a bit of text stating and linking to the license in a copyright notice, like this:
©2019。This work is licensed under aCC BY 4.0 license.
…or as complex as embedding the license information on your website using the HTML code associated with the particular license. Use theCreative Commons License Chooserto get the relevant HTML code.