Set Default Null Options, Data Types, Styles, and Object Owners

Use the Defaults tab in the Model Editor dialog to choose default values for null options, data types, themes, and object ownership.

Follow these steps:

  1. Click Model, Model Properties.

    The Model Editor opens.

  2. Click the Defaults tab and work with the following options:
    Non-Key Null Option

    Specifies whether you can have null as a value for a non-key attribute or column.

    Non-Identifying Relationship

    Specifies whether you can have null as a value for an attribute or a column that has a non-identifying relationship.

    Logical Datatype

    Specifies the data type that is used as the default for all attributes. You can change the data type for a specific attribute in the Attributes Editor dialog. You can also select whether the data type is inherited (Inherit data type in the model editor) or overridden (Override a data type in the model editor).

    Note: When you choose to inherit a data type, the value is inherited from the default settings. When you choose to override, the default value can be overridden and a different value can be added.

    Physical Datatype

    Specifies the default data type for all columns. You can change the data type for a specific column in the Columns Editor. You can also select whether the data type is inherent or overridden.

    Default Theme

    Specifies the default theme for the model. Your theme includes all the font, color, and formatting options for model objects. You use the Theme Editor to work with the formatting options.

    Use Data Type in Unification

    Specifies whether you want to use the data type when you unify three or more entities.

    Migrated Column Options

    Specifies the default settings for highlighting the primary and foreign keys on hovering over a relationship line. By default, the Display Diagram Highlights and Bold check boxes are selected. Also, the Color is set to the default one.

    Enforce Relationship Rules

    Specifies whether a supertype-subtype relationship between two different subtype entities belonging to same or different supertype group should be allowed. By default, the Enforce Relationship Rules check box is selected and such a relationship is not allowed.

    Set Default Owners

    Opens the Set Default Owner dialog where you can set a global default for all objects, or for individual objects. You enter an owner name, and can optionally reset the ownership for all objects when you click Set Owner For All Objects.

    Important! Although you can quickly reset the ownership for all objects using this feature, you cannot undo this operation.

  3. Click Close.

    The default selections are set for the model and the Model Editor closes.