The preservation of data is a difficult task that requires management of technology evolution and authenticity, while 
ensuring that risk due to catastrophes is minimized. The mechanisms provided by data grids for interoperability across 
data management technologies provide part of the required infrastructure. The ability to apply archival processes for 
the generation of archival forms of digital entities is supported by virtual data grids. This paper specifies the 
minimal capabilities that should be provided by virtual data grids to enable the creation of persistent archives that 
hold data for lifetimes greater than that of the underlying software technologies.

This document is the main result of the Persisten Archive Research Group.  It would best fit into the recommendations 
track, but as I understand recommendation docs cannot be submitted by RGs.  So I am somewhat unsure where to put it.  
Possibly Community Practice would be appropriate?  Any advice would be welcome.

DOC and PS versions are available on request. .