ration (NARA) would take this particular topic forward and the later published the 
TRAC (reference [B3]) document which combined ideas from OAIS (reference [1]) and 
Trusted Digital Repositories: Attributes and Responsibilities (TDR—reference [B2]). 
The current document follows on from TRAC in order to produce an ISO standard. 
1.4 
STRUCTURE OF THIS DOCUMENT 
This document is divided into informative and normative sections and annexes. 
Sections 1-2 of this document are informative and give a high-level 