Tidy coverage data for all 9943 CrossRef members

Included in this deposit are the scripts and data collected on the coverage of metadata by the CrossRef members. Collection date is March 27, 2018. The data is available in long, tidy, format. Each row depicts the coverage of one specific aspect, indicating which member and how many DOIs that member deposited. This allows for easy parsing in for example ggplot2 or dplyr.