== Entity Objects ==

An entity object is the ADF Business Components component that represents a row in a database table and simplifies modifying its data. Importantly, it allows you to encapsulate domain business logic for those rows to ensure that your business policies and rules are consistently validated. By the end of this chapter, you'll understand the concepts shown here: 

 {{attachment:entity_overview.gif}}

 * You define an entity object by specifying the database table whose rows it will represent. 

 * You can associate an entity object with others to reflect relationships between underlying database tables. 

 * At runtime, entity rows are managed by a related entity definition object. 

 * Each entity rows is identified by a related row key. 

 * You retrieve and modify entity rows in the context of an application module that provides the database transaction. 
