Public-domain-equivalent license

Have you ever heard of a library? A library is a place where books are kept for people to read. When you go to a library, you can take one of the books to read as long as you promise to bring it back. Other people can also read that book, just like you did, and when they are finished, they bring it back to the library so someone else can read it.

Now, imagine if someone wrote a book and said, "Everyone can read and copy my book for free, and they don't have to bring it back to the library." This person is saying that their book is public domain, which means that it is free for anyone to use, copy, or even sell.

However, sometimes people want to keep some control over their work. They might say, "People can read and copy my book, but they can't sell it for money." This person is using a public-domain-equivalent license, which is like a rule about how people can use their work.

It's a little like the rules at school. When you go to school, there are rules that you have to follow. For example, you have to listen to the teacher and be quiet when they are talking. These rules help everyone learn and have a good time at school.

A public-domain-equivalent license is like a rule that helps everyone play fair when they use someone else's work. It says what people can and can't do with that work, so everyone knows the right way to use it.