From the CHORUS (Clearinghouse for the Open Research of the United States) Blog:
“The guide’s comprehensive explanation of CHORUS’ technical requirements and business decisions will be of immediate use to any publisher considering participation in CHORUS. It will be periodically updated as CHORUS evolves in response to the forthcoming agency requirements, helping researchers and agencies achieve their goals. More generally, the guide reflects our commitment to transparency and will be of interest to anyone who wants to better understand what CHORUS actually entails.”
Direct to Full Text Guide (14 pages; PDF)
Version 1.1; May 2014.