Charge reason must occur maximum once

Charge reason (ibt-104) must occur maximum once.

Fails

<cac:AllowanceCharge>
  <cbc:AllowanceChargeReason>…</cbc:AllowanceChargeReason>
  <cbc:AllowanceChargeReason>…</cbc:AllowanceChargeReason>
</cac:AllowanceCharge>

Fix

Keep a single cbc:AllowanceChargeReason here and delete the duplicates. If both values matter, one of them belongs in a different field.

Schematron

Context

cac:AllowanceCharge[cbc:ChargeIndicator = true()]

Test

(count(cbc:AllowanceChargeReason) <= 1)

Official text: Charge reason (ibt-104) MUST occur maximum once

Official · PINT shared rules. Severity: error. Runs on UBL XML.

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