This archive contains the dump of the OpenCitations Corpus (OCC, http://opencitations.net) provenance data about author roles, created regularly every month. After unzipping the archive, Disk ARchive (DAR, http://dar.linux.free.fr/, a multi-platform archive tool for managing huge amount of data) is needed for recreating the whole structure. For extracting the DAR archive, please run the command dar -x [archive-name] Where "[archive-name"] is the name of the DAR file without final package number and extension. E.g.: dar -x 2016-09-23-corpus_re For further questions, comments, and suggestions please don't hesitate to contact Silvio Peroni at essepuntato@opencitations.net.