Presentation by Diane Hillman at the Authority Control Interest Group (ACIG) meeting at ALA Midwinter, Chicago, IL, Sunday, February 1, 2015, 1pm-3pm.
Diane Hillmann (partner in the consulting firm Metadata Management Associates LLC and previously Authorities Library at Cornell University Libraries) discussed general issues of and how vocabulary versioning has been handled in the RDA Registry. She also demonstrated how those principles and best practices could be used in other kinds of authority files.
You can find Diane's presentation slides here: http://www.slideshare.net/smartbroad/authority-control-interest-group-chicago-2015