# Superseded Sch12 mapping warning

`sch12_code_mapping.md` is retained only to document an earlier, incorrect interpretation. Its assertion that standardized cross-covariance SVD is Schlegel LR-OID is false: cross-covariance omits the state-covariance inverse and constructs neither the LR nor LE generalized inverse. Use `../../../OID_METHOD.md` and active `../../../v2/analysis.py` instead.
