# Getting Started

The Eclipse IDE provides a JPA diagram editor that allows you to create, edit, and display the application data model (persistent types and their relationships) in a graphical environment.

You can only use one JPA diagram per project, and you cannot visualize entities from different projects in one and the same JPA diagram.

Example:

The following JPA diagram represents the data model of employees participating in various projects, that is, two entities with a bidirectional many-to-many relationship:

## Features

The JPA diagram editor comprises the following general features:

- Ability to create persistent types and define relationships between them.

- Ability to import existing persistent types together with their relationships.

- Full synchronization with the underlying application code. That means, whenever you apply a change to any of the objects on the diagram, the corresponding application code updates automatically, and the opposite.

- Error and warning markers with informative quick info text. You can view details on the marked errors and warnings in the Problems view.

- Integration with the JPA Details view and the Miniature View.