This dataset contains all the exported data contributed by volunteers during the SKILLNET project via the crowdsourcing platform CERMROL: https://cemrol.hum.uu.nl/#/ (more information also available here: https://skillnet.nl/cemrol/). Via this platform, volunteers helped in selecting (marking) and adding basic metadata to every letter in a series of selected letter editions. The raw, unprocessed files, are provided in this dataset.

A selection of this raw data was manually cleaned by a student assistant, it is made available as a separate dataset: https://doi.org/10.34894/NJKUF0

Note: The latest version of the CEMROL's code developed by Sheean Spoel from the Digital Humanities Lab at Utrecht University is publicly available at https://github.com/UUDigitalHumanitieslab/scribeAPI and also deposited in Zenodo. The historical date entry is public at https://github.com/UUDigitalHumanitieslab/historical-dates and https://github.com/UUDigitalHumanitieslab/historical-dates-ui. Sheean indicates that the date calculator itself is not open source (the user interface is). The calculations are based on Axel Findling's Roman date converter and Nikolaus A. Bär's easter date calculator.

The data has not been processed, prepared, cleaned, or filtered for final use, it is a data dump from the crowdsourcing platform as it was entered by the volunteers.