# Metadata university repository harvested in VLO: Radboud University PoC

**URL:** <https://forum.clarin.eu/t/metadata-university-repository-harvested-in-vlo-radboud-university-poc/706>\
**Category:** General\
**Tags:** harvesting\
**Created:** [18 February 2025 16:29 UTC](https://forum.clarin.eu/t/metadata-university-repository-harvested-in-vlo-radboud-university-poc/706 "2025-02-18T16:29:04Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Henk](https://avatars.discourse-cdn.com/v4/letter/h/b5ac83/32.png) [@Henk](https://forum.clarin.eu/u/Henk)\
**Post date:** [18 February 2025 16:29 UTC](https://forum.clarin.eu/t/metadata-university-repository-harvested-in-vlo-radboud-university-poc/706/1 "2025-02-18T16:29:04Z")

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We would like to share an interesting achievement. CLARIN’s Virtual Language Observatory (VLO) now harvests the metadata records of datasets in Radboud University’s Data Repository (RDR, [https://data.ru.nl/](https://data.ru.nl/)) that are published in the domain of Humanities. This was done using DataCite as a hinge. Here is a more detailed description how this was done technically (thanks to Twan Goosen!):

1. A query was defined that filters the RDR records out of the total set  
of RU records aggregated by [DataCite.org](http://DataCite.org)
2. This query is used to retrieve records by means of the OAI-PMH  
protocol from DataCite’s dedicated endpoint according to a fixed  
schedule (once per week)  
(we can use the query mentioned  
above thanks to the fact that DataCite offers dynamic sets, as a  
transparent extension of the OAI-PMH specifications)
3. Directly after retrieving the records, they are converted from the  
DataCite metadata format to CMDI using a stylesheet
4. Once these and other metadata sets (from other endpoints) have been  
retrieved, the VLO (re)processes all of its metadata records and uses  
these to build the database that contains the content is visible and  
searchable in the VLO. Part of this process is extracting information  
from the properties within the original metadata onto the predefined  
fields and facets, leveraging the semantic interoperability features of  
CMDI.

If your university also has a data repository with metadata records in DataCite, and you would like to increase the visibility of these datasets in CLARIN’s VLO, then we encourage you to contact vlo@clarin.eu.

Henk van den Heuvel

Datasteward Faculty of Arts, Radboud University, Nijmegen, the Netherlands

Member of CLARIN’s Board of Directors