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Published on: August 11, 2011
The NIH Open Citation Collection: A public access, broad coverage resource.
B Ian Hutchins1, Kirk L Baker1, Matthew T Davis1
1Office of Portfolio Analysis, Division of Program Coordination, Planning, and Strategic Initiatives, Office of the Director, National Institutes of Health, Bethesda, Maryland, United States of America.
The National Institutes of Health (NIH) now offers the Open Citation Collection (NIH-OCC), a public database for biomedical research. This initiative removes barriers, making citation data accessible for robust and reproducible scientific analysis.
Area of Science:
- Biomedical Research
- Bibliometrics
- Data Science
Background:
- Citation data is often restricted by proprietary licenses, hindering analysis and reproducibility.
- Barriers include high costs and limited access for researchers.
- Lack of open data impacts the robustness of scientific conclusions.
Purpose of the Study:
- To describe the NIH Open Citation Collection (NIH-OCC), a publicly accessible database.
- To provide freely available citation data for the biomedical research community.
- To enhance the NIH iCite analytic platform with open citation statistics.
Main Methods:
- Aggregating and enhancing citation data from unrestricted sources like MedLine, PubMed Central (PMC), and CrossRef.
- Utilizing a machine learning pipeline for reference identification, extraction, resolution, and disambiguation from full-text articles.
- Developing a public access database, the NIH-OCC.
Main Results:
- The NIH-OCC is now freely available to the research community.
- The dataset powers citation statistics within the NIH iCite platform.
- Open citation links are accessible through an updated iCite platform.
Conclusions:
- The NIH-OCC democratizes access to citation data, fostering greater transparency and collaboration.
- This initiative significantly lowers barriers for large-scale bibliometric analyses.
- Increased data accessibility promotes more robust and reproducible scientific findings.

