Chapter 4 Building Conceptual Data Models
You can access entity attribute properties from the list of entity attributes or from the entity property sheet.
Each entity attribute definition includes the following properties:
| Property | Description |
|---|---|
| Name | The name of the item which should be clear and meaningful, and should convey the item's purpose to non-technical users |
| Code | The technical name of the item used for generating code or scripts, which may be abbreviated, and should not generally include spaces |
| Comment | Descriptive label for the entity attribute |
| Stereotype | Sub-classification used to extend the semantics of an object without changing its structure; it can be predefined or user-defined |
| Data type | Form of the data corresponding to the entity attribute, such as numeric, alphanumeric, boolean, or others |
| Length | Maximum length of the data type |
| Precision | Maximum number of places after the decimal point |
| Domain | Name of the associated domain |
| Primary Identifier | Indicates whether or not the entity attribute is the primary identifier of the current entity |
| Displayed | When selected, the attribute is displayed in the entity symbol. When cleared, the attribute is not displayed in the entity symbol |
| Mandatory | Indicates whether or not this entity attribute must be assigned a value |
An entity attribute also includes the following properties:
| Property | Description |
|---|---|
| Rules | Business rules associated with entity attribute |
| Standard Checks | Common data constraints |
| Additional Checks | Customized rules for data validation |
| Notes | Description associated with entity |
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