You can specify a data type for an attribute in either of the following ways.
Attach the attribute to a domain - The domain dictates a standard data type, a length, and a level of precision, as well as optional check parameters (see Attaching an attribute to a domain).
Manually select a data type - You select a standard data type along with a length, a level of precision, and optional check parameters
To select a data type for an attribute:
Open the attribute property sheet by double-clicking its Browser entry or from the Attributes tab of its parent object.
Select a data type from the Data Type list (or click the Question mark button to the right of the list to display and select from a list of standard data types).
Undefined data type If you do not want to select a data type immediately, you can choose the <Undefined> data type.
[optional] For data types (such as Characters) that may have different lengths, type the maximum number of characters to be permitted in the Length box.
[optional] For data types (such as Decimal) that take a decimal point, type the number of places permitted after the decimal point in the Precision box.
Click OK to close the attribute property sheet and return to the model.
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To select a data type for an attribute:
Undefined data type