{"L1_core": {"domain": "manufacturing", "category": "bill_of_materials", "entity_type": "document"}, "L5_metadata": {"updated": "2026-01-02", "version": "2.0"}, "L2_manufacturing": {"BOM_types": {"CBOM": {"use": "configuration", "owner": "sales"}, "EBOM": {"use": "design", "owner": "engineering"}, "MBOM": {"use": "manufacturing", "owner": "production"}, "SBOM": {"use": "service", "owner": "after_sales"}}, "standards": ["ISO 10303-239"], "structure": {"levels": ["level_0_finished_product", "level_1_subassemblies", "level_2+_components"], "per_component": ["code", "description", "quantity", "UOM", "position"]}, "management": ["versioning", "effectivity_dates", "substitutions", "phantom_items"]}}