Khalim Conn-Kowlessar 193ae27124 mapper: disambiguate SY system-built from B basement wall (both share code 6) ... RdSAP10 `wall_construction == 6` is canonically WALL_SYSTEM_BUILT, but the gov-EPC basement heuristic hijacked it: Elmhurst lodges both "SY System build" and "B Basement wall" as code 6, so a system-built wall was mis-flagged `main_wall_is_basement` and routed to the RdSAP §5.17 `u_basement_wall` override instead of the system-built U-value table. System-built stays on its canonical code 6; the basement signal moves to an explicit `is_basement` (SapAlternativeWall) / `wall_is_basement` (SapBuildingPart) Optional[bool] flag, set by the Elmhurst mapper from the distinct "SY"/"B" codes via `_elmhurst_wall_is_basement` (True for B, False for SY, None otherwise). The `main_wall_is_basement` / `is_basement_wall` properties honour the flag when set and fall back to the gov-EPC API code-6 heuristic when None — so the API path (basement lodged as integer 6, no flag) and the cert 000565 "B" cohort are unchanged. Acceptance (a recommendation-summary generator depends on it): a system-built MAIN wall reports wall_construction == 6 AND main_wall_is_basement is False; a genuine basement main wall still reports main_wall_is_basement is True. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>		2026-06-04 19:05:18 +00:00
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domain	mapper: disambiguate SY system-built from B basement wall (both share code 6)	2026-06-04 19:05:18 +00:00
loaders	demo generated for use in address2uprn	2026-05-08 14:48:15 +00:00
schema	S0380.217: capture wall_insulation_thermal_conductivity (was dropped)	2026-06-04 11:57:00 +00:00
search	bolstering testing	2026-04-28 13:46:09 +00:00
surveys	S0380.204: extract Main Heating2's own emitter + control (§14.1)	2026-06-03 15:53:32 +00:00
__init__.py	testing out rebaselining	2026-02-12 22:25:03 +00:00
construction_age_band.py	testing out rebaselining	2026-02-12 22:25:03 +00:00
efficiency.py	beginning to assembly the parity class	2026-02-04 18:34:59 +00:00
floor.py	preparing partiy class	2026-02-05 08:54:27 +00:00
fuel.py	beginning to assembly the parity class	2026-02-04 18:34:59 +00:00
heating_controls.py	beginning to assembly the parity class	2026-02-04 18:34:59 +00:00
hotwater.py	beginning to assembly the parity class	2026-02-04 18:34:59 +00:00
main_heating.py	beginning to assembly the parity class	2026-02-04 18:34:59 +00:00
property_type_built_form.py	beginning to assembly the parity class	2026-02-04 18:34:59 +00:00
roof.py	beginning to assembly the parity class	2026-02-04 18:34:59 +00:00
walls.py	beginning to assembly the parity class	2026-02-04 18:34:59 +00:00
windows.py	testing out rebaselining	2026-02-12 22:25:03 +00:00