Among the BIBFRAME 2.0 Specifications at https://www.loc.gov/bibframe/docs/, BIBFRAME 2.0 Specifications: Notes  has recently been added. (It somehow had gotten lost among the set of specifications.)

 

It’s at:

https://www.loc.gov/bibframe/docs/pdf/bf2-notes-june2016.pdf

 

Ray Denenberg

Library of Congress