{"api_version":"1","rule":{"code":"STRUCT-001","title":"Invoice identifier","description":"An invoice identifier is required.","severity":"error","ruleset":"structure","ruleset_version":"1.1.0","profiles":["full","simplified"],"effective_from":"2026-08-15","effective_to":null,"source":{"id":"internal-structure","name":"InvoiceReady capabilities and methodology","url":"/capabilities","accessed":"2026-08-15"},"applicability":"All supported invoice profiles and input syntaxes.","remediation":"Supply the referenced core invoice value using the published syntax or canonical JSON field.","rule_url":"/rules/STRUCT-001"}}