Back in 2015 the ZBW Leibniz Information Center for Economics (ZBW) teamed up with the Göttingen State and university library (SUB), the Service Center of Götting library federation (VZG) and GESIS Leibniz Institute for the Social Sciences in the *metrics project funded by the German Research Foundation (DFG). The aim of the project was: “… to develop a deeper understanding of *metrics, especially in terms of their general significance and their perception amongst stakeholders.” (*metrics project about).
In the practical part of the project the following DSpace based repositories of the project partners participated as data sources for online publications and – in the case of EconStor – also as implementer for the presentation of the social media signals:
- EconStor - a subject repository for economics and business studies run by the ZBW, currently (Aug. 2019) containing round about 180,000 downloadable files,
- GoeScholar - the Publication Server of the Georg-August-Universität Göttingen run by the SUB Göttingen, offering approximately 11,000 publicly browsable items so far,
- SSOAR - the “Social Science Open Access Repository” maintained by GESIS, currently containing about 53,000 publicly available items.
In the work package “Technology analysis for the collection and provision of *metrics” of the project an analysis of currently available *metrics technologies and services had been performed.
As stated by [Wilsdon 2017], currently suppliers of altmetrics “remain too narrow (mainly considering research products with DOIs)”, which leads to problems to acquire *metrics data for repositories like EconStor with working papers as the main content. As up to now it is unusual – at least in the social sciences and economics – to create DOIs for this kind of documents. Only the resulting final article published in a journal will receive a DOI.
Based on the findings in this work package, a test implementation of the *metrics crawler had been built. The crawler had been actively deployed from early 2018 to spring 2019 at the VZG. For the aggregation of the *metrics data the crawler had been fed with persistent identifiers and metadata from the aforementioned repositories.
At this stage of the project, the project partners still had the expectation, that the persistent identifiers (e.g. handle, URNs, …), or their local URL counterparts, as used by the repositories could be harnessed to easily identify social media mentions of their documents, e.g. for EconStor:
- handle: “hdl:10419/…”
- handle.net resolver URL: “http(s)://hdl.handle.net/10419/…”
- EconStor landing page URL with handle: “http(s)://www.econstor.eu/handle/10419/…”
- EconStor bitstream (PDF) URL with handle: “http(s)://www.econstor.eu/bitstream/10419/…”