Part 2: Abstract transmittal format
For the purposes of this document, the terms and definitions given in ISO/IEC 18023-1 and the following apply.
a defined item within the abstract syntax
a transmittal that has been encoded using a technique as defined in this part of ISO/IEC 18023.
hierarchy of DRM class instances and other information organized according to the principles described in part 1 of ISO/IEC 18023
[ISO/IEC 18023-1]
file containing all or part of a transmittal
interchange format for transmittals
http://www.iso.ch/iso/en/ittf/PubliclyAvailableStandards/ISO_IEC_18023-2_Ed1.html