Chapter 3 Building Conceptual and Logical Diagrams
You can modify an object's properties from its property sheet. To open an attribute property sheet, double-click its Browser entry in the Attributes folder within an entity, association, or inheritance.
The General tab contains the following properties:
| Property | Description |
|---|---|
| Name | Specifies the name of the item, which should be clear and meaningful, and should convey the item's purpose to non-technical users. |
| Code | Specifies the technical name of the object, which is used for generating code or scripts, which may be abbreviated, and should not generally include spaces. |
| Comment | Specifies a descriptive label for the attribute. |
| Stereotype | Sub-classification used to extend the semantics of an object without changing its structure; it can be predefined or user-defined. |
| Entity/ Association/ Inheritance | [read-only] Specifies the parent object. Click the tool to the right of the field to open its property sheet. |
| Data Item | [CDM only, read-only] Specifies the related data item. Click the tool to the right of the field to open its property sheet. |
| Inherited from | [LDM only, read-only] Specifies the parent entity from which the attribute is migrated through an inheritance. |
| Data type | Specifies the data type of the attribute, such as numeric, alphanumeric, boolean, or others. Click the question mark button to open the list of data types (see "Domains (CDM/LDM/PDM)" in the Building Physical Diagrams chapter). |
| Length | Specifies the maximum length of the data type. |
| Precision | Specifies the maximum number of places after the decimal point. |
| Domain | Specifies the name of the associated domain (See "Domains (CDM/LDM/PDM)" in the Building Physical Diagrams chapter). If you attach an attribute to a domain, the domain supplies a data type to the attribute, and can also apply length, decimal precision, and check parameters. |
| Primary Identifier | [entity attributes only] Indicates whether or not the attribute is the primary identifier of the entity. |
| Displayed | [entity and association attributes only] Displays the attribute in the object symbol. |
| Mandatory | Specifies that every object occurrence must assign a value to the attribute. Identifiers (see Identifiers (CDM/LDM)) are always mandatory. |
| Foreign identifier | [LDM only, read-only] Indicates whether or not the attribute is the foreign identifier of the entity. |
The following tabs are also available:
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