Contains the estimated number of members for an attribute, as defined by the user.
<AggregationDesignAttribute> <!-- or DimensionAttribute -->
Data type and length
0-1: Optional element that can occur once and only once.
This value is assigned by the user and is used by the AggregationDesign Element (ASSL).
The elements that correspond to the parents of EstimatedCount in the Analysis Management Objects (AMO) object model are AggregationDesignAttribute and DimensionAttribute.