In Kimball methodology, the 'expert' spends time/energy on developing a near 'perfect' representation of 'data' to be warehoused. Dimensions are conformed. All is well. But the action is in the value space.

(L)oad the data - safely, without corruption, without judgement, without "cleaning". (E)xtract new information from the data - generate new properties from this. (T)ransform - build views, construct

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