Applies to the Pack information of the Subcode in the Sub data part of the DAT system. Describes how to use the newly defined Pack item=1001 (Character) and describes the expansion procedure of Pack item=0100 (TOC) out of many Packs which are defined for audio use (ID=0000) of the Sub ID. Establishes the writing and recording procedures, and to preserves the interchangeability of the character information when usede in the Subcode of DAT systems.