Vapor v0.81

It's goal is to provide developers with an easy-to-use framework for persistence, that is consistent with OO design and does not interfere with the code of classes that are to be persistently stored.
Vapor does not require the developer to know anything about relational databases, so he can work on the task of writing their application logic.
Here are some key features of "Vapor":
· Object-Oriented API
· Transparent to persistable classes
· Support for inheritance
· Flexible queries for object retrieval
· Transactions (ACID) with rollback support and logging
· Versioning
· Automatic generation of human-readable RDBMS schema
· Metadata specification through separate XML markup
· Concurrent access by multiple users
· Uniqueness constrains
What's New in This Release:
· A minor bugfix release, correcting documentation erros of new features in 0.80 and correct Persistable behaviour if no PersistenceManager exists.

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