NCBI PubMed is a free search system for biomedical literature

NCBI PubMed is a free search system for biomedical literature

PubMed Central ® (PMC) is a free, full-text archive of biomedical and life science journal literature from the National Library of Medicine of the National Institutes of Health (NIH/NLM). Pursuant to NLM's legislative mandate to collect and preserve biomedical literature, PMC is part of the NLM collection, which also includes NLM's extensive print and licensed electronic journal collections, and supports contemporary biomedical and health care research and practice as well as future scholarship. PMC has been available to the public online since 2000 and is developed and maintained by the National Center for Biotechnology Information (NCBI) at NLM. Since its inception in 2000, PMC has grown from just two journals, PNAS: Proceedings of the National Academy of Sciences and Molecular Biology of the Cell, to an archive of thousands of journal articles. In addition, PMC contains author manuscripts deposited through the NIH Manuscript Submission System (NIHMS) and preprints collected through the NIH Preprint Pilot. The PMC archive contains over 8 million full-text article records covering centuries of biomedical and life science research (late 1700s to present). This content includes articles that have been formally published in scholarly journals, author manuscripts that have undergone peer review and been accepted for publication in journals, and preprint versions of articles that are publicly available prior to peer review. Content is stored in the PMC archive through collaborations with publishers, societies, research funders, and international organizations. Our collections page provides an overview of the collections that result from these content collaborations. NLM's statutory mission is to collect, index, preserve, and make available the biomedical and health-related literature of today and the past. Therefore, PMC is designated to provide permanent access to all its content, even as technology continues to evolve. (For more information, see NLM's Collection and Preservation Policy.) PMC makes all content free to read (after an embargo period, in some cases) because NLM believes that the best way to ensure accessibility and viability of digital materials over time is through consistent and active use of the archive. Free access does not mean the absence of copyright protection, however (see PMC Copyright Statement). PMC stores content in Extensible Markup Language (XML), which represents the structure and meaning of a document in a relatively simple and human-readable form. All PMC content is converted to and stored in the NISO Z39.96-2015 JATS XML format. This standard format is the most efficient and widely used format for archiving journal articles. NLM operates the PMC International Network, which provides a framework for maintaining copies of the PMC corpus in other reliable international archives that share the same goals and operate according to the same principles as PMC.

Reading: 23 2019-03-27

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