What is a PersistentObjectStore?
My guess is that it's the same as an ObjectStore (in the generic sense, not referring to the ObjectStore product). It would be the subset of functionality of an ObjectOrientedDatabase that is concerned with storing objects outside of the address space of the process that is creating and/or using the objects. -- JosephDale
RScheme's "persistent object store module," located in rs.db.rstore, maps files into virtual memory, and does tricks with pointers, to present an object-oriented virtual memory model for persistent objects, in LISP.
"Lazy Modular Upgrades in Persistent Object Stores"
by Chandrasekhar Boyapati, Barbara Liskov, Liuba Shrira¤, ChuangHue? Moh, Steven Richman
MIT Computer Science and Artificial Intelligence Laboratory
ACM Conference on Object-Oriented Programming, Systems, Languages and Applications (OOPSLA), October 2003
-- a paper on "Persistent Object Stores," a term they define to include persisting to relational databases.
"Servertec Persistent Object Store (POS) is a high-performance cross-platform object oriented database engine written entirely in Java."
-- (Looks like it does not use or support SQL.)