Merits and Limits: Applying open data to monitor open access publications in bibliometric databases
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Identifying and monitoring Open Access (OA) publications might seem a trivial task while practical efforts prove otherwise. Contradictory information arise often depending on metadata employed. We strive to assign OA status to publications in Web of Science (WOS) and Scopus while complementing it with different sources of OA information to resolve contradicting cases. We linked publications from WOS and Scopus via DOIs and ISSNs to Unpaywall, Crossref, DOAJ and ROAD. Only about 50 be matched via a DOI to Unpaywall. Matching with Crossref brought 56 distinct licences, which define in many cases the legally binding access status of publications. But only 44 Crossref, while more than 50 Crossref. Contrasting OA information from Crossref licences with Unpaywall we found contradictory cases overall amounting to more than 25 partially explained by (ex-)including green OA. A further manual check found about 17 publications that are accessible through publishers' websites. These preliminary results suggest that identification of OA state of publications denotes a difficult and currently unfulfilled task.
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