Scientific quality and editorial coverage
Scientific and editorial quality are important factors for journal assessment. Journals should generally be subject to peer review, although some non-peer-reviewed serials (e.g., newsletters) on core topics may be considered. The inclusion of author abstracts and references in journal articles are also factors taken into consideration as quality indicators.
Journals in all languages may be covered, but for journals with articles in languages other than English, English abstracts should generally be present. The appearance and quality of the English abstract contributes to the overall assessment. If the article language is in a non-Roman script, English language titles must be provided.