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Open data sources in VOSviewer

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Presentation at the Center of Scientometrics, National Science Library, Chinese Academy of Sciences, Beijing, China, April 12, 2019.

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Open data sources in VOSviewer

  1. 1. Open data sources in VOSviewer Nees Jan van Eck Centre for Science and Technology Studies (CWTS), Leiden University Center of Scientometrics (CoS), National Science Library, Chinese Academy of Sciences Beijing, China, April 12, 2019
  2. 2. VOSviewer 1
  3. 3. Users of VOSviewer • Researchers • Research institutions • Research funders • Scientific publishers • Industry 2
  4. 4. Development 3
  5. 5. Data sources supported by VOSviewer 4
  6. 6. Bibliometric networks in VOSviewer 5 WoS Scopus Dimensions PubMed Crossref Citation network of pubs / journals / authors / orgs / countries Co-authorship network of authors / orgs / countries Co-citation network of pubs / journals / authors / orgs / countries Co-occurrence network of keywords / terms Bibliographic coupling network of pubs / journals / authors Bibliographic data source
  7. 7. Types of networks supported by each data source 6 Co-authorship Co- occurrence Citation Bibliographic coupling Co-citation Web of Science      Scopus      Dimensions      PubMed      Crossref      Europe PMC      Semantic Scholar      OCC / COCI      Wikidata     
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  10. 10. Limitations of data sources • Web of Science (closed) • Scopus (closed) • Dimensions (closed, but open for research) • Crossref (open, except for half of the citation data) • OCC (open, but low coverage) 9
  11. 11. Data access 10 Download
  12. 12. API support for open data sources • DOI files • Interactive querying – Supported by APIs of Crossref and Europe PMC – Crossref API has restrictions in the type of queries that can be performed – Europe PMC API is most flexible, but querying and retrieving citation data cannot be done using a single API call – Not supported by the APIs of Semantic Scholar, OCC, COCI, and Wikidata 11 http://api.crossref.org/works?filter=issn:1751-1577,from-pub-date:2010-01-01 https://www.ebi.ac.uk/europepmc/webservices/rest/search?query=(TITLE:"zika" OR ABSTRACT:"zika") AND PUB_YEAR:[2018 TO 2019]
  13. 13. Interactive querying 12
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  16. 16. Wish list for improving open data sources • Expanding coverage of publications (OCC) • Opening citations (Crossref) • Opening other metadata, e.g. abstracts (Dimensions, Crossref, OCC) • Improving completeness and standardization of metadata (Crossref) • Improve APIs – Add or expand interactive querying (Crossref, Europe PMC, OCC) – Speeding up (OCC) 15
  17. 17. Outlook • Work together with data providers to improve their APIs • Expand API support • Add support for additional data sources – Microsoft Academic – OpenAIRE – Lens.org • Add support for full-text data sources • Development of web-based version of VOSviewer 16
  18. 18. Sneak preview 17
  19. 19. Thank you for your attention! 18

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