I have read on open-access journals that some of them allow non-exclusive publishing rights. What does this mean exactly? Is there a general open access policy or consensus about what these publishing rights should be?
Does this mean that I can publish my article in other journals too? Wouldn't that be considered plagiarism, or at least reduce the citations to the original article in the first journal? Does this mean that the author(s) is/are allowed to only self-archive their article on a repository website but cannot publish it elsewhere?
I have also seen this term on the website of Directory of Open Access Journals. So, I suspect that this has to do with open-access policies.