Research Databases and Indexes: PubMed, Scopus, Web of Science, DOAJ, and Google Scholar
A clear guide to what major databases do, how journal selection differs, and why indexing readiness starts before the first issue.
Indexing is not one thing
PubMed, MEDLINE, Scopus, Web of Science, DOAJ, Google Scholar, Crossref, and OpenAlex do not play the same role. Some are curated indexes, some are discovery platforms, some are metadata infrastructures, and some are broad search systems.
What curated indexes look for
Curated indexes assess the journal, not only individual articles. They look at publication history, peer review, editorial independence, ethics policies, author instructions, archiving, technical quality, and whether the published content fits the index scope.
What authors should know
For authors, indexing affects visibility, but it is not the only quality signal. A credible new journal can be unindexed while it builds publication history. What matters is transparency, named editors, clear policies, real peer review, stable identifiers, and honest claims.
A practical roadmap
Start with complete journal policies, issue discipline, article-level DOIs, ORCID-ready author metadata, archiving, and consistent publication. Then apply to appropriate directories and indexes only when the journal has enough content and operational maturity.
Further reading
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