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Chapter 2 Building an Object-Oriented Model
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In the list of available data types, a variable indicates where you have to type
a length or precision, as follows:
Variable Replace with
%n Length
%s Length with precision
%p Decimal precision
All object languages allow you to select the <undefined> data type. The
<undefined> data type indicates which domains remain without data types. If
an <undefined> data type is present when you generate your database, it is
replaced by the default data type for your database.
Selecting a data type for a domain
You can select a data type for a domain in two ways:
♦ Directly from the List of Domains
♦ From the property sheet for the domain
When you select a data type for a domain from its property sheet, you can
choose a data type from a list of standard data types available in
PowerDesigner. This list presents the available data types in a more
structured and complete format than the abbreviated format used in the data
type dropdown listbox in the list of domains.
Selecting a data type for a domain from the list
v To select a data type for a domain from the list:
1 Select Model➤Domains.
The list of domains appears.
2 Click the domain that you want to define.
An arrow appears at the beginning of the line.
3 Click the Data Type attribute.
A dropdown listbox appears.
Undefined data
type
The list of standard
data types