Describe _(Persistence 101) here

What matters is whether Persistence is more or less Orthogonal. 


See the Glossary entry about Orthogonal Persistence and AboutPersistence 

<a href="http://citeseer.nj.nec.com/liedtke93persistent.html">Jochen Liedtke's essential paper about Eumel</a>

Lots of works done on _(Orthogonal Persistence) at the University of St. Andrews, and spreading from there, to other places in Scotland or Australia. 

Based on a scottish persistence engine, _(PLOB) brings persistence to _(CLOS) objects using the _(CLOS MOP).

Read something about Transactions in databases, concerns of Atomicity, etc. 

NB: Persistent data structure are a nice way of implementing orthogonal persistence, and very great things to know (see Chris Okasaki's book), but they are really a different topic.
