Attributes are values which define the facts or qualify for the selection as filters. Attribute Forms are descriptive information defining an attribute. All attributes has an ID form. Attribute forms must have a one- one relationship with other forms of the same attribute. We can Display, Sort or Qualify (for use in filters) any of the attribute forms of an attribute. The properties of a dimension which are used for aggregation shall be kept as a different attribute rather than keeping as an attribute form.