`FX-SCH-A-000790`

Attribute '@format' is required in this context.

Official rule text

Attribute '@format' is required in this context.

Where the rule applies

Rule set	Document type	Severity
ZUGFeRD / Factur-X (2.5.2) FeRD, FNFE-MPE	Factur-X EXTENDED (CII)	error

Fatal and error findings make the invoice invalid (valid: false); warnings and information do not.

Technical check

Syntax: CII · ZUGFeRD / Factur-X (2.5.2)
Context: /rsm:CrossIndustryInvoice/rsm:SupplyChainTradeTransaction/ram:ApplicableHeaderTradeDelivery/ram:DespatchAdviceReferencedDocument/ram:FormattedIssueDateTime/qdt:DateTimeString
Test (must be true): @format

How the API reports this rule

Every finding of POST /v1/validate carries the rule id, severity, message, location (XPath) and rule set, and links this page (docUrl):

{
  "severity": "error",
  "ruleId": "FX-SCH-A-000790",
  "message": "Attribute '@format' is required in this context.",
  "xpath": "/…",
  "source": "schematron:zugferd@2.5.2",
  "docUrl": "https://einvoice-api.eu/rules/fx-sch-a-000790.html"
}

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Rule text and severity are taken unchanged from the official rule set; this page is generated from the API's configuration. Not legal advice.