Issue 6. Persistence (normative)

[Terry Allen <tallen@sonic.net>]

"The registry and repository shall have published policies 
relating to its plans for continuing in operation and the 
outcomes to be expected should it cease operation or should 
business relationships with the owners of its content change. A 
point of departure for describing archival longevity is the 
“Reference Model for an Open Archival Information System” 
(OAIS) which is a draft ISO standard. 
It should be possible for an SO to request that an entity be kept 
available for a given length of time, also that it be withdrawn 
after a given length of time. TO DO: devise the semantics for 
this, perhaps in a DTD fragment."