NATIONAL LIBRARY OF MEDICINE PubMed Central Brooke Dine National Library of Medicine Medical Library Association Conference May 2004

NATIONAL LIBRARY OF MEDICINE What is PubMed Central? PubMed Central (PMC) is the U.S. National Library of Medicine's free digital archive of biomedical and life sciences journal literature. PMC serves as a… a permanent archive a platform for enriched linking, analysis, and use of research reports and data one of many sources of full-text articles linked to PubMed/MEDLINE citations

NATIONAL LIBRARY OF MEDICINE Access to PMC Content Free access to full-text articles and supporting data A journal may delay free access to its content Research articles are generally free in a year or less Non-research articles may have a delay of 6-24 months depending on the journal Full-text searching of current and back issue content via PMC Entrez Citations for articles included in PubMed Fully integrated with other Entrez databases – sequence data, taxonomy, books, etc.

NATIONAL LIBRARY OF MEDICINE PMC Participation & Usage Currently, PMC includes: 150 life sciences journals over 300,000 articles, letters, etc. 700,000 unique users monthly 1.75 million full-text retrievals per month Total retrieval is nearly 4 million pages per month

NATIONAL LIBRARY OF MEDICINE PMC Home Page

NATIONAL LIBRARY OF MEDICINE PMC Journal List – Full List

NATIONAL LIBRARY OF MEDICINE PMC Journal List – Tabbed List

NATIONAL LIBRARY OF MEDICINE PMC and Open Access Deposit of Open Access (OA) content is subject to normal PMC standards and requirements OA source files can be downloaded by anyone: PMC-OAI service for full-text XML FTP service to download complete article packet – XML, images, PDF and supplemental data files OA simplifies distribution of content to collaborating archives Opens door for data mining and creation of innovative products by others Open Access may apply to an entire journal and its content or at the article-level when authors have retained the copyright

NATIONAL LIBRARY OF MEDICINE Open Access Journals in PMC Open Access Journals in PMC: Amphibian and Reptile Conservation BioMed Central Journals PLoS Biology Journals in PMC which offer authors the option to publish open access articles: Nucleic Acids Research PNAS In October 2003, PMC began accepting individual open access articles from journals that do not participate in PMC on a routine basis. Science

NATIONAL LIBRARY OF MEDICINE Open Access & Copyright

NATIONAL LIBRARY OF MEDICINE Open Access & Copyright

NATIONAL LIBRARY OF MEDICINE PubLink with Open Access

NATIONAL LIBRARY OF MEDICINE Open Access TOC

NATIONAL LIBRARY OF MEDICINE Open Access Articles

NATIONAL LIBRARY OF MEDICINE Ahead of Print Articles

NATIONAL LIBRARY OF MEDICINE Back Issue Digitization in PMC Create a complete digital archive of PMC journals Bring the collection to today’s “if not online, it doesn’t exist” user Cover-to-cover digital copy of everything up to where journal began producing electronic copy Publisher gets free, unencumbered digital copy First complete archive, Bulletin of the Medical Library Association (1911), released in November 2003

NATIONAL LIBRARY OF MEDICINE What’s Being Digitized? 50 journals that deposit current issues including: American Society for Microbiology (10 journals) BMJ Publishing Group (BMJ and specialist journals) Bulletin of the Medical Library Association Journal of Clinical Investigation Molecular Biology of the Cell Nucleic Acids Research Plant Physiology PNAS: Proceedings of the National Academy of Sciences of the USA

NATIONAL LIBRARY OF MEDICINE Archive Table of Contents (TOC)

NATIONAL LIBRARY OF MEDICINE Digitized Issue TOC

NATIONAL LIBRARY OF MEDICINE Digitized Article – Summary

NATIONAL LIBRARY OF MEDICINE Digitized Article – Page Browse

NATIONAL LIBRARY OF MEDICINE Back Issue Digitized Images

NATIONAL LIBRARY OF MEDICINE Back Issue Digitized Images

NATIONAL LIBRARY OF MEDICINE Back Issue Digitized Images

NATIONAL LIBRARY OF MEDICINE Entrez Entrez retrieval system supports access to PubMed, online books, the sequence databases, a taxonomy database, and more. Users can now search the full text of all SGML- or XML- based content deposited in PMC, including articles for which the full text is viewable only at the journal’s site. Back issue content is also searchable via PMC Entrez.

NATIONAL LIBRARY OF MEDICINE PMC Entrez – Journal Limits

NATIONAL LIBRARY OF MEDICINE PMC Entrez Limits

NATIONAL LIBRARY OF MEDICINE PMC Entrez Results

NATIONAL LIBRARY OF MEDICINE Linking Options within PMC Articles within PMC offer various linking options across articles, issues, and journals. These include: Commentaries Cited In Referenced Articles Corrections

NATIONAL LIBRARY OF MEDICINE Linking: Commentary Articles

NATIONAL LIBRARY OF MEDICINE Linking: Commentary Articles

NATIONAL LIBRARY OF MEDICINE Cited In

NATIONAL LIBRARY OF MEDICINE Cited In TOC

NATIONAL LIBRARY OF MEDICINE Referenced Articles

NATIONAL LIBRARY OF MEDICINE Linking: Corrected Articles

NATIONAL LIBRARY OF MEDICINE Linking: Original Article

NATIONAL LIBRARY OF MEDICINE PMC PubMed Central Site: Questions about PMC: