Retrieve publisher's policy based on publisher's country. The code should be the ISO_3166-1_alpha-2 code of the country https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2.
There are several ways to provide your API key.
The best way to know about them is to refer to the vignette about
"Setting Up Your API key" accessible with the following command:
vignette("setting_up_api_key", package = "rromeo").
You can also use
rr_auth that will use the provided key to store it as
an environmental variable.
Returns a data frame with the following columns:
the internal index of the publisher in the SHERPA/RoMEO database
the name of the publisher
if applicable an alternative name of the publisher or the name of the specific publishing branch
a colour assigned by the database that reflects the default policies of the publisher
is the preprint (not reviewed) archivable?
is the postprint (reviewed but not formatted) archivable?
is the publisher's version (reviewed and formatted) archivable?
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