{"L1_core": {"type": "stp", "domain": "networking", "category": "cable", "subcategory": "shielding_type"}, "L4_features": ["braided_shield", "excellent_emi_protection", "industrial_environment", "grounding_required"], "L3_standards": ["TIA/EIA-568", "ISO/IEC 11801"], "L2_performance": {"shielding": "overall_braid", "impedance_ohms": 100}}