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    7. Building Type Buckets

    Building type map (BRIS Matrikkel)

    Use this file to document Matrikkel leaf native_code → standard_code bucketing (RESIDENTIAL, COMMERCIAL, INDUSTRY, OTHER) for fire_data.filters where source_id = 2 and axis = 'building_type'.

    The four buckets are cross-source bridge tags for charts and get_fire_data (p_building_type token resolution). They do not select upstream API rows: BRIS ETL always sends the slice's native_code (one Matrikkel leaf per ingest slice). See «ETL rule — native wins» in filter-axes-native-to-filter-id.md.

    Apply Matrikkel → four-bucket standard_code in bulk: scripts/sql/update_bris_matrikkel_building_type_buckets.sql. See also filter-axes-native-to-filter-id.md.