How many of the documents indexed in “open” repositories are in fact freely available, rather than on “dark deposit” or otherwise inaccessible.


What is an Immediate-Deposit/Optional-Access (IDOA) mandate, and what is Almost-OA?


How important is the so-called eprint request Button to the success of the IDOA mandate, and how efficacious is the Button in allowing readers to obtain copies of items held on dark deposit in repositories?


I offer some thoughts on these and related matters in a document that can be accessed here: