{"L1_core": {"domain": "materials", "category": "adhesive", "entity_type": "material"}, "L5_metadata": {"updated": "2026-01-02", "version": "2.0"}, "L2_materials": {"types": {"epoxy": "two_component", "acrylic": "UV_anaerobic", "contact": "evaporation", "hot_melt": "cooling", "silicone": "moisture_high_temp", "polyurethane": "moisture_2K", "cyanoacrylate": "moisture_cure_seconds"}, "formats": ["liquid", "paste", "film", "spray", "tape"], "standards": ["ISO 11003", "ISO 4587", "ASTM D1002", "EN 301", "EN 15274"], "properties": ["tensile_shear_strength", "service_temp", "open_working_time", "flexibility", "chemical_resistance"]}}