User-defined attribute (UDA) dimensions enable you to reuse UDAs that you create for members in multiple dimensions. UDAs are words or phrases used to describe characteristics of members—within calculation scripts, member formulas, and reports so that they return lists of members associated with the specified UDA. For example, if you have a Product dimension with various product members, you could create a UDA dimension called New Products and base certain calculations only on new products.
To create UDA dimensions:-
Add members to the UDA dimension.
Members are the UDAs that you can choose from when assigning UDAs to a member using the Property Grid. For additional information, see Working with User-Defined Attributes.