Adding Properties

With an existing model open and at least one entity or relationship selected, click the Entities, Relationships, or All button on the Editing ribbon in the Data tab. The Edit Properties dialog box appears.

Enter the name of the new property in the Name field.

Select the type of the new property in the Type drop-down box. The following data types are supported:

Data Type	Description
Boolean	A logical type with two values: true and false.
Double	A numeric data type that contains both negative and positive double precision numbers between 2^-1074 and (2-2^-52)×2¹⁰²³. In E notation, the range of values is 4.9E-324 to 1.7976931348623157E308. For information on E notation, see: http://en.wikipedia.org/wiki/Scientific_notation#E_notation
Float	A numeric data type that contains both negative and positive single precision numbers between 2^-149 and (2-2²³)×2¹²⁷. In E notation, the range of values is 1.4E-45 to 3.4028235E38. For information on E notation, see: http://en.wikipedia.org/wiki/Scientific_notation#E_notation
Integer	A numeric data type that contains both negative and positive whole numbers between -2³¹ (-2,147,483,648) and 2³¹-1 (2,147,483,647).
Long	A numeric data type that contains both negative and positive whole numbers between -2⁶³ (-9,223,372,036,854,775,808) and 2⁶³-1 (9,223,372,036,854,775,807)
String	A sequence of characters.

Add the value of the new property in the Value field.
Click Add.
Click OK.