semantic layer
C2CEFR level
90/100Rarity: very rare
TechnicalRegister
An abstraction that maps raw data structures to consistent business definitions so everyone queries the same metric logic.
Once revenue lives in the semantic layer, finance and marketing finally stop arguing over which number is right.
Rarity runs from 0 (a word everyone knows) to 100 (almost never seen outside specialist or literary writing). Level is the word's real difficulty on the CEFR scale, from A1 to C2.
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