The structure of the Workforce Information Database is a product of the Analyst Resource Center Consortium.  The Consortium  periodically reviews the structure of the WID, and makes modifications when they deem it is appropriate to do so.  When modifications occur, a new version of the WID is created. The ARC maintains documentation and provide support for the current and past two versions of the WID.

Below is a listing of Workforce Information Database versions, links to structure documents and their release dates.

Database Version Release Date Structure Document
2.7 May 2017, rev Mar 18 Open
  Addenda & errata March 2018 Open
2.6.1 May 2015 Open
  Addenda & errata December 2015 Open
  Revised Load Order Document October 2016 Open
2.6 December 2014 Open