SIE.7:2 - Problem

Mapping logic is often dispersed across SQL, ETL configuration, model transformations, lookup tables, API adapters, and undocumented operator knowledge. The same “mapping” word then refers to a semantic relation, an extraction query, a unit conversion, a data movement, and the Work that ran it.

When these objects collapse, semantic review happens after implementation and cannot identify what was intended. Defaults conceal missing inputs, many-to-one mappings drop distinctions, identifiers are normalized without issuer context, and error rows vanish. A code diff reveals mechanics but not the receiving-use claim it is allowed to produce.