If work done by Chanakya, like Chanakya Niti, is in the public domain, then how can some people publish and sell books? I want to make an Android app based on Chanakya Niti for that I definitely need a source. I have a book for that but my confusion is that it says you can't copy the content in any form. How can any publisher claim copyright on the teachings of person who lived in India centuries ago? The confusion is that many people are saying that it's in the public domain so you can make an app, but the source books are saying you can't copy the content. The second confusion is that a few people have said that you can't make money out of it, but the developers are already making money by monetizing their app. I want to make more money by putting it in the &quot;in app-purchases&quot; category, so why can't I do that?
The author of the book may have a copyright, because he created a new piece of work from the/a original work. For example, by translating it in another language or in a modernized language, by rearranging the content, by adding images or commentaries etc. You will therefore have to find a book or other source that is not or not anymore copyrighted.
Both. The user made an infringing copy with the upload, the developer did with the download. Further the ToS between the app owner and the user will not protect them from being sued by the owner of the copyright. They don't have any ToS with them.
You can read it, you can examine it to the point where you understand it, and then you can get inspired by the code and write your own code, without copying the code on the website, which does the same thing. If there is no license, then you can do what copyright law allows you to do. You are not allowed to copy the code, or create derived works by taking the code and modifying it.
Those posts are talking about making a modified copy of a copyrighted work. The key word is copy. You are not making a copy. Copyright is not about how a physical embodiment of a copyrighted work is treated. You can burn a book and shred a newspaper. Neither of those actions is making a copy. Also, cutting up a newspaper and pasting a picture on your wall has nothing to do with any “derivative works” issue.
You probably can. There are a few questions here. First, is the message protected by copyright? In general, it probably is, but there are many exceptions that might allow you to use it without permission. Unfortunately, these exceptions vary from jurisdiction to jurisdiction. The exceptions tend to allow the use of small excerpts of a work for various sorts of purposes that don't undermine the copyright holder's ability to profit. That leads to the second question, which is why you are using that message. If you're including it in your source code so you can test whether a message generated at run time is in fact that message, that's one thing, and it's probably okay. On the other hand, if the owner of the copyright sells a database of all its message strings, and you're compiling a similar database that you also intend to sell, that's probably not okay. A third question concerns the Firefox license terms. It's entirely possible that they allow you explicitly to do what you're considering, in which case it doesn't matter what copyright law says about it. On the other hand, Firefox is open source software, and under some open source licenses, if you incorporate any of the source code in your own product, you are required to release your product's source code under the same license. If you're not already planning to do that, you should consider carefully whether including that error message would trigger that provision (if there is one) of Firefox's open source license.
This sounds completely incorrect to me. First, subsequent research is not normally a "derivative work" for the purpose of copyright, since copyright doesn't protect your ideas but only the particular form in which you have expressed those ideas. Second, as the owner of the copyright, you can permit anyone to make any sort of copy or derivative work, or sell, assign, or license the ability to do so to other parties, without regard to whether the work has been published. The real reason that nonpublication of your work would stifle further research is that researchers will not have access to it.
You can't, in general, know whether a distributor of a work has permission to distribute, or is a pirate site. I verified that they have posted an illegal copy of a work that I created, and I know that I did not grant permission to them (or anyone) to infringe my copyright. Both hosting and downloading works without permission is a violation of copyright law, so both parties are liable. Downloaders may erroneously rely on the "I didn't know!" defense, which in the US carries no legal weight. Even so, if you download my book, it will probably cost me vastly more to sue you for infringement than the damages that I might be awarded over your infringement. Usually, copyright holders go after the pirate sites, and only rarely go after particularly egregious serial downloaders.
Works enter the public domain after ... years from publication. In the United States, this is incorrect for some works and incomplete for the rest. Currently, most works are copyrighted for the life of the author plus 70 years; publication date doesn't affect the copyright term. Works made for hire (such as code written for Google by an employee), anonymous works, and pseudonymous works are copyrighted for 95 years after publication or 120 years after creation, whichever is shorter.