{"L1_core": {"domain": "engineering", "category": "3d_file", "entity_type": "digital_asset"}, "L5_metadata": {"updated": "2026-01-02", "version": "2.0"}, "L3_relations": {"parent": "cad", "workflows": ["visualization", "manufacturing", "3d_printing", "scanning"]}, "L2_engineering": {"format_categories": {"3d_printing": {"3MF": {"features": "full_metadata", "standard": "3MF_Consortium", "extension": ".3mf"}, "AMF": {"standard": "ISO/ASTM 52915", "extension": ".amf"}, "STL": {"geometry": "triangulated_mesh", "extension": ".stl"}}, "point_cloud": {"E57": {"standard": "ASTM E2807", "extension": ".e57"}, "LAS": {"standard": "ASPRS", "extension": ".las"}, "PLY": {"features": ["points", "color"], "extension": ".ply"}}, "visualization": {"FBX": {"features": ["mesh", "animation", "rigging"], "extension": ".fbx"}, "OBJ": {"features": ["mesh", "color", "texture"], "extension": ".obj"}, "glTF": {"features": ["mesh", "PBR_materials", "web"], "extensions": [".gltf", ".glb"]}}, "cad_engineering": {"IGES": {"geometry": "hybrid", "extensions": [".iges", ".igs"]}, "STEP": {"geometry": "B-Rep", "standard": "ISO 10303", "extensions": [".step", ".stp"]}, "Parasolid": {"geometry": "B-Rep", "extensions": [".x_t", ".x_b"]}}}}}