{"L1_core": {"type": "flat_cable", "domain": "networking", "category": "cable", "subcategory": "form_factor"}, "L4_features": ["low_profile", "under_carpet", "under_door", "easy_concealment", "space_saving"], "L3_standards": ["varies_by_category"], "L2_performance": {"profile": "flat", "typical_height_mm": 2}}