This documentation concentrates upon the following Core API interfaces:
These interfaces are fully intended to be exposed to application code.
The Extension API is intended to be used by application programmers
to extend Hibernate functionality. None of these interfaces are intended
to be called by the application - they are called internally by Hibernate.
This API is less stable than the Core API. The safest way to extend
functionality is to contribute extensions back to the project; that way
extensions will be updated when the Extension API changes.