There are many degrees and kinds of wider and
easier access to [research] literature. By “open access”
to this literature, we mean its free availability on
the public internet, permitting any users to read,
download, copy, distribute, print, search, or link
to the full texts of these articles, crawl them for
indexing, pass them as data to software, or use them
for any other lawful purpose, without financial, legal,
or technical barriers other than those inseparable
from gaining access to the internet itself. The only
constraint on reproduction and distribution, and the
only role for copyright in this domain, should be to
give authors control over the integrity of their work
and the right to be properly acknowledged and cited