An overlay journal is an open access, quality-assured journal whose articles are held in one or more repositories. An overlay journal does not host the articles on the journal’s website but links back to the relevant article in an open repository or preprint server.
Overlay journals take advantage of the growing momentum for preprint sharing while leveraging the distributed nature of the web. They represent an innovative and cost effective alternative to traditional journals. The COAR Notify Initiative is developing the technical glue that will enable overlay journals to scale by connecting to articles in any compatible repository and preprint server.