Hi,
Businesskey and Membercaption are roles allocated to attributes in the level of a Regular Dimension.
Consider a Products dimension, containing a hierarchy describing products, with the following levels:
AllProducts
Product Line
Product Type
Product
If you consider the lowest level (Product), it is made up of a series of members - each member is a different product. The usual data required to describe each product is a uinque identifier (Businesskey), and a descriptive value which can be displayed in the row/column headings of a report or analysis (MemberCaption). For example you would probably include the Product Code as the BusinessKey, and the Product Name as the MemberCaption. If you also have a data item containing a more lengthy description of each product, you could bring this in and set it as the MemberDescription attribute.
Later on in the studios, the BusinessKey attribute is used in the Member Unique Name (MUN) of each product member, and the MemberCaption is used in the row/column headings as the value displayed.
Hope that helps.
MF.