{"L1_core": {"domain": "engineering", "category": "preliminary_design", "entity_type": "document"}, "L5_metadata": {"updated": "2026-01-02", "version": "2.0"}, "L2_engineering": {"standards": {"UK": "RIBA_Stages_1-2", "USA": "AIA_Schematic_Design", "Spain": "CTE_anteproyecto"}, "definitions": {"industry": ["service_blueprint", "business_blueprint", "technology_blueprint"], "architecture": "preliminary_design_drawing"}, "architectural_content": ["descriptive_report", "indicative_drawings", "budget_estimate", "tentative_schedule"]}}