[1] The index includes all journals that meet the following requirements: "explicit procedures for external peer review; an academic editorial board, with members affiliated with universities or other independent research organizations; a valid ISSN code, confirmed by the international ISSN register; abstracts in English and/or another international language relevant for the field for all published articles; information on author affiliations and addresses; a maximum two thirds of the authors published in the journal from the same institution".
[3] ERIH was originally established by the European Science Foundation and was transferred to the NSD - Norwegian Centre for Research Data in 2014, mainly because it already operated the Norwegian Register for Scientific Journals, Series and Publishers.
[4] At the same time, it was extended to also include social science disciplines and renamed ERIH PLUS.
[7] As of July 1, 2021, the ownership was transferred to the fresh Norwegian Directorate for Higher Education and Skills.
ERIH PLUS has been criticized for "the ease of having the journal included [in it] – semi-automatically, upon a set of criteria which are mostly formal, without taking quality into consideration".