{"L1_core": {"domain": "commercial", "category": "customer", "entity_type": "entity"}, "L5_metadata": {"updated": "2026-01-02", "version": "2.0"}, "L2_commercial": {"GDPR": ["legal_basis", "consents", "data_subject_rights"], "master_data": {"contact": ["email", "phone", "contact_persons"], "commercial": ["payment_terms", "credit_limit", "price_list", "sales_agent"], "identification": ["customer_code", "name", "VAT", "addresses"]}, "classification": {"by_type": ["B2C", "B2B", "B2G"], "by_value": ["premium_VIP", "standard", "occasional", "lead"]}}}