Can someone from the Omeka team complete this sentence in the documentation?
http://omeka.org/s/docs/developer/for_classic_developers/
Doctrine ORM
Omeka S has adopted the Doctrine Object Relation Mapper for database queries and to define records. Thus, records no longer extend from an Omeka_Record_AbstractRecord class. Instead, they will extend from
[SOMETHING IS MISSING HERE]
This also lets Omeka S separate concerns between Entities, Api Adapters, and Representations This replaces the Omeka Classic system of defining a record and optional table class as the model.