AggregationInstanceSource Element (ASSL)
Identifies the source of data for user-defined aggregation instances bound to a Partition element.
Data type and length
0-1: Optional element that can occur once and only once.
If this element is missing or set to a blank string, the data source view of the cube that owns the partition is used by default.
For additional information about the Binding type, including tables of Analysis Services Scripting Language (ASSL) objects of the Binding type and the inheritance hierarchy of Binding types, see Binding Data Type (ASSL).
For an overview of data bindings in ASSL, see Data Sources and Bindings (Analysis Services - Multidimensional Data).