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PubMed Central

PubMed Central (PMC) is a free digital repository that archives open access full-text scholarly articles that have been published in biomedical and life sciences journals. As one of the major research databases developed by the National Center for Biotechnology Information (NCBI), PubMed Central is more than a document repository. Submissions to PMC are…

Technology, History, Art & Science

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Research this topic

Explore the main themes, entities and connections around PubMed Central. Start with the topic map, then use the sections below for research and deeper semantic analysis.

Explore this topic

Start with a few of the strongest sections from the source topic. These are research directions, not a list of keywords you must use.

Key facts & relationships

High-confidence facts extracted from structured source data. Use them as anchors for further research.

Cost
Free
Disciplines
Medicine
Format coverage
Journal articles
History
2000–present
No. of records
10,800,000
Producer
United States National Library of Medicine (United States)

Topics to explore

Browse the full topic structure. Each item opens a new analysis centered on that subject.

Overview

History

Adoption

Technology

Reception

PMCID

Advanced semantic analysis

Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.

Map overview Semantic statistics

PubMed Central

Nodes67
Edges66
Triples85
Avg. degree1.97
Density0.029851
Components1

How this topic connects Entity context

See the strongest relationship patterns around the current topic before diving into the raw triples.

PubMed Central

Top relations

related to Adoption · 25
PubMed Central → British Library, Consolidated Appropriations Act, Europe PubMed Central, February, Health, In, January, Launched, National Institutes, NIH, NIH Public Access Policy, NIH-funded, November, October, On, PubMed Central Canada, PubMed Central International, The Canadian, These, This
related to Technology · 15
PubMed Central → Articles, DTDs, Graphics, Interchange DTD, Many, NLM Archiving, NLM Journal Publishing DTD, Older, PDF, Received, SGML, The, This, XML, XSLT
related to history · 12
PubMed Central → David Lipman, December, E-biomed, Harold Varmus, May, NCBI, NIH, Papers, Pat Brown, Stanford, The, Varmus
related to PMCID · 8
PubMed Central → It, PMC, PMC1852221, PMCID, PMID, PubMed, The, The PMCID
see also · 6
PubMed Central → Europe PubMed CentralJATS, Latin America, MEDLINE, PubMed Central CanadaRedalyc, PubMed Identifier, SciELO
related to Reception · 3
PubMed Central → PMC, Reactions, While PMC
is a · 2
PubMed Central → free digital archive of full articles, key example of
Cost · 1
PubMed Central → Free
Disciplines · 1
PubMed Central → Medicine
Format coverage · 1
PubMed Central → Journal articles

Important terminology Word statistics

Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.

Important terminology

pubmed central articles pmc publishers nih access biomedical nlm free e-biomed research repository journals open published one journal ncbi publication

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
PubMed CentralCostFree1.00infobox
PubMed CentralDisciplinesMedicine1.00infobox
PubMed CentralFormat coverageJournal articles1.00infobox
PubMed CentralHistory2000–present1.00infobox
PubMed CentralNo. of records10,800,0001.00infobox
PubMed CentralProducerUnited States National Library of Medicine (United States)1.00infobox
PubMed CentralRecord depthIndex, abstract & full-text1.00infobox
PubMed CentralTitle list(s)pmc.ncbi.nlm.nih.gov/journals/1.00infobox
PubMed CentralWebsitepmc.ncbi.nlm.nih.gov1.00infobox
PubMed Centralis afree digital archive of full articles0.90text
PubMed Centralis akey example of0.90text
AIPinstance ofOrganizations0.80text

Related concept clusters Concept neighborhoods

These clusters group vocabulary that occurs around closely connected concepts in the source material.

    Connections between topic areas Semantic bridges

    Bridges can reveal useful research angles that are easy to miss in a flat list of related terms.

    Min side: 3
    For writers, content strategists, SEOs, marketers and creators — from quick topic research to advanced semantic analysis.