Utility functions

check_key()

Check SHERPA/RoMEO API key

rr_api_version()

Return SHERPA/RoMEO API version

rr_auth()

Store provided API key into Environment Variable

Journal Functions

Functions to access journals’ policies

rr_journal_find()

Find if journals are available in SHERPA/RoMEO

rr_journal_issn()

Retrieve journal policy using ISSN

rr_journal_name()

Retrieve journals policies by matching title

Publisher functions

Functions to access information on publishers’ policies

rr_publisher_all()

Get all Publisher Policies

rr_publisher_continent()

Get Publisher Policy by Publisher's Continent

rr_publisher_country()

Get Publisher Policy by Publisher's Country

rr_publisher_id()

Get Publisher Policy from Publisher ID

rr_publisher_name()

Get Publisher Policy by Publisher Name

rr_romeo_colour()

Query publisher by RoMEO colour