When a Scholar is One Among 500, What Does it Mean to be "An Author"?

Last week, an editorial in Nature highlighted the problem of the proliferating number of authors on papers. Following a 2012 symposium at Harvard University, a small group has proposed a taxonomy of contributor roles that would add details to an author list and have tested that among a group of authors. Scholarly publishers should consider adopting this taxonomy to improve the accuracy and granularity to improve attribution and the assignment of credit.