Dimensions is used as a source for publication and citation references. All journal articles whose publication type is “article” are included in OA monitor analyses. The database only contains information on the corresponding author for very few publications.
Web of Science
Web of Science is used as a source for publication and citation references. Web of Science makes a selection when indexing journals. Therefore, fewer publications are included in Web of Science than in Dimensions. All publications that can be found in Web of Science provide information on the corresponding author.
Unpaywall harvests open access content from publishers and repositories. In addition to articles, publication channels and licences are also recorded. This information is used in the OA monitor to calculate the OA proportions and to assign an OA model to each publication. See also OA Categories
Directory of Open Access Journals (DOAJ)
The DOAJ is a freely accessible, independent database, which indexes peer-reviewed open-access journals covering all areas of science, technology, medicine, social sciences, arts, and humanities. For each journal, in addition to various metadata such as publisher or LCC subjects, the database also includes the first year of OA and the amount of any APCs incurred.
The OpenAPC initiative provides data sets on fees paid for open access publishing by various institutions. All institutions voluntarily submit their data to OpenAPC. The data sets contain APCs and hybrid APCs. Other output types such as colour charges or page charges are not included. There is currently no (reliable) source for these output types.
GRID - Global Research Identifier Database
GRID is a freely accessible database that catalogues research institutions worldwide in a standardized format and provides them with persistent identifiers. Moreover, GRID contains further metadata such as GPS coordinates and relationships between organizations.
LAS:eR is an electronic resource management system for libraries and consortia offices. It is used to manage electronic resources at local, regional, and national level. Through LAS:eR, the OA monitor is provided with information about subscription fees. In order for the OA monitor to obtain data from LAS:eR, institutions must agree to exchange their data. The OA monitor maintains the confidentiality of this information and publishes only aggregate subscription fees, which do not allow conclusions to be drawn about individual institutions. After agreeing to exchange data via the LAS:eR user interface, institutions can view their own expenses in detail in the OA monitor. For this purpose, authorization in the OA monitor is required.