All Boolean attribute dimensions in a single database have two level 0 members. The default names for the members are True and False. Essbase enables you to change the default names; for example, to Yes and No.
When you set an attribute dimension type as Boolean, Essbase automatically creates two members with the names specified in the setting. If the attribute dimension includes members, you must remove the members before you can change the attribute dimension type to Boolean.
Changing the Boolean member-name setting does not retroactively change the names of the Boolean attributes that are already assigned. For example, if the Caffeinated attribute for product 100-10 is True and you change the Boolean attribute dimension member name from True to Yes, the Caffeinated attribute for product 100-10 is not changed to Yes.
If you have more than one Boolean attribute dimension, specify a prefix or suffix member name format to ensure unique member names; for example, Caffeinated_True and Caffeinated_False .
To change the member names setting of Boolean attribute dimensions in a database:
Open the outline in Outline Editor to the Properties tab.
In the Boolean, date, and numeric attribute settings option group, specify the names for the True and False members of Boolean attribute dimensions.
Click OK.
Setting Boolean Attribute Member Names in the Oracle Essbase Database Administrator's Guide