The list of ASC Data Identifier (DI) & GS1 Application Identifiers (AI) is openly accessible on the Internet now. The URL for this ISO/IEC 15418 part is:
http://www.mhi.org/standards/di
(current file: ANS_MH10.8.2_CM_20140512.doc).
There you will find the upgraded revision with the latest "DI's", and AI's, including the "pointer to process (P2P - DI") and other updates.

Heinrich Oehlmann
member of the ASC Data Identifier Committee (DMC)
July 2, 2014