{"L1_core": {"domain": "manufacturing", "category": "extrusion", "entity_type": "process"}, "L2_process": {"types": {"barrier": {"use": "food_packaging", "materials": ["EVOH", "PA", "PE"]}, "structural": {"use": "profiles", "materials": ["PVC", "ABS", "PP"]}, "multi_layer": {"layers": [2, 7], "description": "Multiple materials extruded simultaneously"}}, "standards": ["ISO 14527", "ASTM D2838"], "parameters": {"pressure_bar": [50, 300], "temperature_C": [180, 280], "line_speed_m_min": [5, 100]}}, "L5_metadata": {"updated": "2026-01-04", "version": "2.0"}, "L3_relations": {"applies_to": ["thermoplastics", "polymers"], "related_processes": ["extrusion", "lamination", "thermoforming"]}}