Módszerek összehasonlítása

	PubMed és MEDLINE	A nyílt hozzáférésű folyóiratok jegyzéke	Journal Citation Reports
Tudományterület	Bibliometria	Bibliometria	Bibliometria
Módszercsalád	Process / pipeline	Process / pipeline	Process / pipeline
Keletkezés éve	1966	2003	1975
Megalkotó	National Library of Medicine (NLM), U.S. National Institutes of Health	DOAJ Community (Swedish library consortium, later expanded to international consortium)	Institute for Scientific Information (ISI), now Clarivate Analytics
Típus	Database	Database	Tool
Alapmű	National Library of Medicine. (2024). PubMed: Home. Retrieved from https://pubmed.ncbi.nlm.nih.gov/	Directory of Open Access Journals. (2024). About DOAJ. Retrieved from https://doaj.org/	Clarivate Analytics. (2024). Journal Citation Reports. Retrieved from https://clarivate.com/webofsciencegroup/solutions/journal-citation-reports/
Alternatív nevek	PubMed, MEDLINE, NLM, PubMed Central	DOAJ, Directory of Open Access	JCR, Clarivate Journal Citation Reports
Kapcsolódó	5	5	5
Összefoglaló	PubMed is a free, publicly accessible literature database maintained by the National Library of Medicine (NLM), a division of the U.S. National Institutes of Health. It provides access to biomedical and life sciences literature from MEDLINE (the curated subset of ~30 million indexed journal articles), life science journals, in-process articles, and preprints. MEDLINE, established in 1966, is the gold standard for biomedical literature indexing, using MeSH (Medical Subject Headings), a hierarchical controlled vocabulary of ~33,000 terms. PubMed is the primary discovery tool for clinicians, researchers, and healthcare professionals worldwide seeking evidence-based information.	The Directory of Open Access Journals (DOAJ) is a community-maintained, freely accessible directory of high-quality, peer-reviewed open-access journals and articles established in 2003. DOAJ indexes over 20,000 open-access journals across all disciplines (sciences, social sciences, humanities, arts) from diverse geographic regions. The directory serves researchers, librarians, and administrators as the authoritative curated list of legitimate open-access journals—differentiating quality open-access publications from predatory journals that lack genuine peer review. DOAJ quality seal, awarded to journals meeting stricter governance and transparency criteria, enables identification of the highest-caliber open-access publications.	Journal Citation Reports (JCR) is an annual publication by Clarivate Analytics providing comprehensive citation metrics and performance analytics for journals indexed in Web of Science Core Collection. Launched in 1975, JCR publishes Impact Factor, the most widely recognized journal quality metric, alongside supplementary metrics (5-year IF, Journal Citation Indicator, Immediacy Index, Cited Half-Life, and citation distribution analysis). JCR is the authoritative source for journal ranking, benchmarking, and impact assessment in research evaluation systems globally. Access requires institutional subscription, though some institutions provide free access to affiliated researchers.