Chapter 3 Building Conceptual and Logical Diagrams


Data item properties

You can modify an object's properties from its property sheet. To open a data item property sheet, double-click its Browser entry in the Data Items folder.

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 data item.
Stereotype Sub-classification used to extend the semantics of an object without changing its structure; it can be predefined or user-defined.
Data type Specifies the code indicating the data format, such as N for numeric or A for alphanumeric, followed by the number of characters.
Length Specifies the maximum number of characters.
Precision Specifies the number of places after the decimal point, for data values that can take a decimal point.
Domain Specifies the name of the associated domain (See "Domains (CDM/LDM/PDM)" in the Building Physical Diagrams chapter). If you attach a data item to a domain, the domain supplies a data type to the data item, and can also apply length, decimal precision, and check parameters.

The following tabs are also commonly used:

 


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