An Archival Repository reliably stores digital objects for long
periods of time (decades or centuries). The archival nature of the
system requires new techniques for storing, indexing, and replicating
digital objects.  In this paper we discuss the specialized indexing
needs of a write-once archive. We also present a reliability algorithm
for effectively replicating sets of related objects.  We describe an
administrative user interface and a data import utility for archival
repositories.  Finally, we discuss and evaluate a prototype repository
we have built, the Stanford Archival Vault, SAV.