Chapter 9 Working with Data Models

Checking a Data Model

You can check the validity of your data model at any time. A valid data model conforms to the following kinds of rules:

Each object name in a data model must be unique
Each entity in a CDM must have at least one attribute
Each relationship in a LDM must be attached to at least one entity
Each index in a PDM must have a column

Check your data model before generation
We recommend that you check your data model before generating another model or a database from it. If the check encounters errors, generation will be stopped. The Check model option is enabled by default in the Generation dialog box.

You can check a data model in any of the following ways:

Press F4, or
Select Tools→Check Model, or
Right-click the diagram background and select Check Model from the contextual menu

The Check Model Parameters window opens, which allows you to specify the kinds of checks to perform, and the objects to apply them to. For detailed information about this window and correcting problems reported, see "Checking a Model" in the Models chapter of the Core Features Guide .

The following sections document the data model-specific checks available by default. For information about checks made on generic objects available in all model types, see "Checking a Model" in the Models chapter of the Core Features Guide .