Classes of errors in DOI names (Revised Version of Data Management Plan)

The data involved in this project are used to answer the following research questions: what are the classes of errors that characterize invalid DOIs? Which classes of errors can be addressed through automatic processes so as to get the correct DOIs? How many correct DOIs and, consequently, citations have been obtained by applying such automatic processing? While searching for answers to these questions, we used DOI names that have been collected by the OpenCitations Index Of Crossref Open DOI-To-DOI References (COCI) while processing data provided by Crossref.