class %DeepSee.Model.expression
extends %DeepSee.Model.node, %DeepSee.Model.source
Meta-data object that represents an additional expression variable within the fact table for a DeepSee cube.
No facts are generated for an expression; this is simply a way to define a reusable subexpression when building
a cube.
method %Validate()
as %Status
Test if this index's definition is valid.