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Software review: COCI, the OpenCitations Index of Crossref open DOI-to-DOI citations

Author

Listed:
  • Ivan Heibi

    (University of Bologna)

  • Silvio Peroni

    (University of Bologna)

  • David Shotton

    (University of Oxford)

Abstract

In this paper, we present COCI, the OpenCitations Index of Crossref open DOI-to-DOI citations ( http://opencitations.net/index/coci ). COCI is the first open citation index created by OpenCitations, in which we have applied the concept of citations as first-class data entities, and it contains more than 445 million DOI-to-DOI citation links derived from the data available in Crossref. These citations are described using the resource description framework by means of the newly extended version of the OpenCitations Data Model (OCDM). We introduce the workflow we have developed for creating these data, and also show the additional services that facilitate the access to and querying of these data via different access points: a SPARQL endpoint, a REST API, bulk downloads, Web interfaces, and direct access to the citations via HTTP content negotiation. Finally, we present statistics regarding the use of COCI citation data, and we introduce several projects that have already started to use COCI data for different purposes.

Suggested Citation

  • Ivan Heibi & Silvio Peroni & David Shotton, 2019. "Software review: COCI, the OpenCitations Index of Crossref open DOI-to-DOI citations," Scientometrics, Springer;Akadémiai Kiadó, vol. 121(2), pages 1213-1228, November.
    • Handle: RePEc:spr:scient:v:121:y:2019:i:2:d:10.1007_s11192-019-03217-6
    DOI: 10.1007/s11192-019-03217-6
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    References listed on IDEAS

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    1. van Eck, N.J.P. & Waltman, L., 2009. "VOSviewer: A Computer Program for Bibliometric Mapping," ERIM Report Series Research in Management ERS-2009-005-LIS, Erasmus Research Institute of Management (ERIM), ERIM is the joint research institute of the Rotterdam School of Management, Erasmus University and the Erasmus School of Economics (ESE) at Erasmus University Rotterdam.
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    Cited by:

    1. Yongjun Zhu & Erjia Yan & Silvio Peroni & Chao Che, 2020. "Nine million book items and eleven million citations: a study of book-based scholarly communication using OpenCitations," Scientometrics, Springer;Akadémiai Kiadó, vol. 122(2), pages 1097-1112, February.
    2. Yuyan Jiang & Xueli Liu, 2023. "A Bibliometric Analysis and Disruptive Innovation Evaluation for the Field of Energy Security," Sustainability, MDPI, vol. 15(2), pages 1-29, January.
    3. Zhentao Liang & Jin Mao & Kun Lu & Gang Li, 2021. "Finding citations for PubMed: a large-scale comparison between five freely available bibliographic data sources," Scientometrics, Springer;Akadémiai Kiadó, vol. 126(12), pages 9519-9542, December.
    4. Ivan Heibi & Silvio Peroni, 2021. "A qualitative and quantitative analysis of open citations to retracted articles: the Wakefield 1998 et al.'s case," Scientometrics, Springer;Akadémiai Kiadó, vol. 126(10), pages 8433-8470, October.
    5. Yuyan Jiang & Xueli Liu, 2023. "A construction and empirical research of the journal disruption index based on open citation data," Scientometrics, Springer;Akadémiai Kiadó, vol. 128(7), pages 3935-3958, July.
    6. Alessia Cioffi & Sara Coppini & Arcangelo Massari & Arianna Moretti & Silvio Peroni & Cristian Santini & Nooshin Shahidzadeh Asadi, 2022. "Identifying and correcting invalid citations due to DOI errors in Crossref data," Scientometrics, Springer;Akadémiai Kiadó, vol. 127(6), pages 3593-3612, June.
    7. Toluwase Victor Asubiaro & Sodiq Onaolapo, 2023. "A comparative study of the coverage of African journals in Web of Science, Scopus, and CrossRef," Journal of the Association for Information Science & Technology, Association for Information Science & Technology, vol. 74(7), pages 745-758, July.
    8. Federica Bologna & Angelo Iorio & Silvio Peroni & Francesco Poggi, 2023. "Do open citations give insights on the qualitative peer-review evaluation in research assessments? An analysis of the Italian National Scientific Qualification," Scientometrics, Springer;Akadémiai Kiadó, vol. 128(1), pages 19-53, January.
    9. Alberto Martín-Martín & Mike Thelwall & Enrique Orduna-Malea & Emilio Delgado López-Cózar, 2021. "Google Scholar, Microsoft Academic, Scopus, Dimensions, Web of Science, and OpenCitations’ COCI: a multidisciplinary comparison of coverage via citations," Scientometrics, Springer;Akadémiai Kiadó, vol. 126(1), pages 871-906, January.

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