{
  "id": "BR-64",
  "country": "EU",
  "syntax": "ubl",
  "group": "document",
  "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": "The Item standard identifier (BT-157) shall have a Scheme identifier.",
  "statement_lang": "en",
  "context": "cac:InvoiceLine/cac:Item/cac:StandardItemIdentification/cbc:ID | cac:CreditNoteLine/cac:Item/cac:StandardItemIdentification/cbc:ID",
  "test": "exists(@schemeID)",
  "meaning": "The Item standard identifier (BT-157) must have a Scheme identifier. The message starts with \"The\", not \"Each\", and says \"shall have a Scheme identifier\". It ends with a period. The context is the item standard identifier on an invoice line or a credit note line. The published test checks that the schemeID attribute exists. It does not check the scheme value.",
  "fix": "When an item standard identifier (BT-157) is sent, give that id a scheme identifier.",
  "example_fail": "An item standard identifier has no schemeID attribute.",
  "example_pass": "That identifier has a schemeID attribute.",
  "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/BR-64/",
  "source_retrieved": "2026-10-18",
  "last_verified": "2026-10-18"
}