Presentation at the workshop 'Open Citations: Opportunities and Ongoing Developments' at the ISSI2019 conference. Rome, Italy, September 2, 2019.

1. Open citations: Next steps
Ludo Waltman
Workshop ‘Open Citations: Opportunities and Ongoing Developments’
ISSI2019 conference
Sapienza University, Rome
September 2, 2019

2. Outline
• Microsoft Academic
• From open citations to open metadata
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3. Microsoft Academic
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4. Microsoft Academic
• Launched in 2016
• Data obtained through web indexing
• Data accessible through API or Azure platform
• Data openly available under an ODC BY license
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5. Microsoft Academic vs. Scopus
4Thanks to Martijn Visser for compiling the statistics.
Number of documents in
Microsoft Academic and Scopus (2014–2017)
Overlap: 9.5M
Microsoft Academic: 40.9M Scopus: 11.7M

6. Microsoft Academic vs. Scopus
5Thanks to Martijn Visser for compiling the statistics.

7. Microsoft Academic data quality
• Knowledge of the quality of Microsoft Academic data is limited
• Known data quality issues:
– Publication years
– Affiliations
– Source titles
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9. From open citations to
open metadata
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10. Availability of abstracts in Crossref (2008-2017)
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11. Availability of affiliations in Crossref (2008-2017)
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12. Crossref participation report: Elsevier
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13. Crossref participation report: PLOS
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14. Crossref participation reports: Frontiers
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15. Crossref participation report: Hindawi
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16. From Journal of Informetrics (JOI) to Quantitative
Science Studies (QSS)

17. QSS offers comprehensive open metadata
• Five manuscripts have been published as
‘just accepted’
• ORCIDs for almost all authors
• ORCIDs, affiliations, and abstracts have
been deposited in Crossref
• References will also be deposited and will
be made openly available
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18. From open citations to open metadata
• Natural next step is to broaden the focus from open
citations to open metadata, perhaps with an emphasis
on open abstracts
• Scope of I4OC may evolve
• Support from Plan S
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19. Thank you for your attention!
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