Please note : This help page is not for the latest version of Enterprise Architect. The latest help can be found here.

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Create a Data Model Diagram

To model the structure of a relational database you use Data Modeling diagrams, which are extended Class diagrams. When you open a Data Modeling diagram the matching Diagram Toolbox is automatically opened, which contains the diagram elements:

  • Table
  • View
  • Procedure
  • Sequence
  • Function
  • Association and
  • Database Connection


Display the 'New Diagram' dialog using any of the methods outlined here.


Design > Diagram > New

Context Menu

Right-click on Package | Add Diagram

Right-click on element | Add | Add Diagram

Keyboard Shortcuts



Project Browser caption bar menu | New Diagram

Create a Data Modeling diagram



See also


This field defaults to the Package name.

If required, overtype the default name with your preferred name.

Select From

Click on 'Extended'.

Add New Diagrams

Diagram Types

Click on 'Data Modeling'.


Click on this button to create the diagram.

The Diagram View displays the blank diagram, and the 'Data Modeling' pages display in the Diagram Toolbox.

Drag elements and connectors from the Toolbox onto your diagram, to create your data model.

Data Modeling Toolbox


  • The default diagram connector notation for all new diagrams is Information Engineering, although many data modelers prefer the notation IDEF1X; to make this change select 'Design > Diagram > Manage > Properties > Connectors' and click on the required option in the 'Connector Notation' drop-down list

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