Contains the custom rollup formula for an attribute member represented by the parent Attribute element.
<Attribute> ... <CustomRollup>...</CustomRollup> ... </Attribute>
|Data type and length||String|
|Cardinality||0-1: Optional element that can occur once and only once.|
The CustomRollup element contains a Multidimensional Expressions (MDX) expression that defines the rollup behavior of the attribute member defined by the parent Attribute element.
For more information about MDX expressions, see Expressions (MDX).