Attributes

Attribute	Data Type	Definition
source	String	Name of the source dimension. Must be a dimension in this schema. Case-sensitive.
level	String	Name of the level to join to. If not specified, joins to the lowest level of the dimension.
usagePrefix	String	If present, then this is prepended to the Dimension column names during the building of collapse dimension aggregates allowing 1) different dimension usages to be disambiguated during aggregate table recognition and 2) multiple shared dimensions that have common column names to be disambiguated.