Global Variable Properties
Global variables have the following properties:
Type
Specifies the variable type:
• Simple
• Reference
• Array
Length
Specifies the maximum number of characters for varchar and nvarchar data types
Nullable
Specifies whether or not simple variables are nullable.
You can either enter the name of the class directly, or access the class by clicking the control button to the right of the Class Name field and selecting it from the Select a Class dialog.
System
Provides a system-assigned initial value
Null
Sets the initial value to a null string
Note: This option is always available for reference and array variable types, and only available for simple types if you have made the variable nullable.
String
Lets you specify a string for the initial value in an adjacent entry field
Note: This option is available only for simple type variables.