{
  "id": "UBL-SR-50",
  "country": "EU",
  "syntax": "ubl",
  "group": "syntax",
  "severity": "fatal",
  "severity_note": "fatal, from the Flag column of the Peppol BIS Billing 3.0 UBL rules index retrieved 2026-10-18.",
  "spec": "Peppol BIS Billing 3.0, May 2026 release, EN 16931 model bound to UBL",
  "statement": "Item description shall occur maximum once",
  "statement_lang": "en",
  "context": "cac:InvoiceLine | cac:CreditNoteLine",
  "test": "count(cac:Item/cbc:Description) <= 1",
  "meaning": "The item description shall occur at most once. The statement has no period and says shall. It is 41 characters. The flag is fatal. The context is an invoice line or a credit note line. The published test does not wrap the count in parentheses. It counts the item description. The count comparison has a space before <= and a space after it.",
  "fix": "Send at most one item description on a line.",
  "example_fail": "An invoice line has two item descriptions.",
  "example_pass": "An invoice line has one item description, or none.",
  "example_note": "Illustration of the condition in the official statement. Not an example published by the source.",
  "source_url": "https://docs.peppol.eu/poacc/billing/3.0/rules/ubl-tc434/UBL-SR-50/",
  "source_retrieved": "2026-10-18",
  "last_verified": "2026-10-18"
}