`BR-FXEXT-11`

Each "ID of parent line" (BT-X-304) must refer to an existing "ID of invoice item" (BT-126).

Official rule text

[BR-FXEXT-11]-Each "ID of parent line" (BT-X-304) must refer to an existing "ID of invoice item" (BT-126).

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.

Business terms concerned (EN 16931)

BT-126

Technical check

Syntax: CII · ZUGFeRD / Factur-X (2.5.2)
Context: //ram:IncludedSupplyChainTradeLineItem [normalize-space(ram:AssociatedDocumentLineDocument/ram:ParentLineID) != '']
Test (must be true): some $p in //ram:IncludedSupplyChainTradeLineItem/ram:AssociatedDocumentLineDocument/ram:LineID satisfies normalize-space($p) = normalize-space(ram:AssociatedDocumentLineDocument/ram:ParentLineID)

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": "BR-FXEXT-11",
  "message": "[BR-FXEXT-11]-Each \"ID of parent line\" (BT-X-304) must refer to an existing \"ID of invoice item\" (BT-126).",
  "xpath": "/…",
  "source": "schematron:zugferd@2.5.2",
  "docUrl": "https://einvoice-api.eu/rules/br-fxext-11.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.