concept
CH column metadata: esios.archives_i90.sign
Direction ('Subir' = upward / 'Bajar' = downward). NOT uniform across programs — BS rows always carry sign but energy is unsigned per §17; BILATERAL has no sign.
# `esios.archives_i90.sign`
Direction ('Subir' = upward / 'Bajar' = downward). NOT uniform across programs — BS rows always carry sign but energy is unsigned per §17; BILATERAL has no sign.
- **category**: dimension
- **common_pitfalls**:
- Naive sum(energy * price) only nets out for signed-energy programs (BT/RR/PDVP/RTR/OFFER_BT)