Like many other academic institutions, Leiden University aims to ensure that the various entities that can be distinguished within the international ecosystem for scholarly communication, or Open Science, can be identified effectively and uniquely via PIDs. Within Leiden’s repository infrastructure, all academic publications and all digitised objects from the Special Collections department and are assigned Handles. The institutional data management policy stipulates explicitly that researchers ought to deposit their data sets in trusted data repositories which assign PIDs. As presented at the first PIDapalooza, a project was also conducted in 2017 to stimulate researchers to create an ORCID id, and to associate these identifiers with their research outcomes as much as possible. Although the ORCID project did encounter a number of difficulties, the various activities that were organized to raise awareness of the benefits of ORCID eventually led to a big increase in the number of author identifiers. Leiden University is currently incorporating these identifiers within its various information systems, in such a way that these identifiers can actually create added value, both for machines and for human beings. The various services that have been built on top of ORCID, for instance, can effectively help researchers to simplify administrative tasks. A large number of researchers at Leiden use their ORCID id to ensure that the data in the CRIS is accurate and up to date. To communicate the fact that these IDs are available, Leiden University is currently developing a visual system, in which the various types of identifiers are represented using specific icons. As one of the founding members of the IIIF consortium, Leiden University is also trying to embed object IDs and author IDs logically within IIIF manifests. The various identifiers that have been created can be used, moreover, to create network visualisations which display research results within their broader context. Such graphs can clarify, for instance, that publications are based on other publications, or that some data sets are connected to specific publications. Overall, these different activities can improve the visibility of research outcomes and they can ultimately enhance the impact of academic research.
