ram:UnitQuantity no more than once

Error FX-SCH-A-000344 Factur-X

Element 'ram:UnitQuantity' may occur at maximum 1 times.

Mandatory rule: As long as it is violated, the invoice is invalid and will be rejected by validators.
What is wrong

ram:UnitQuantity occurs more than once in ram:IncludedReferencedProduct. This element may appear no more than once in this scope.

What the rule means

ram:UnitQuantity contains a quantity value for the referenced product. The rule limits the number of these quantity elements to one at most.

Please include `ram:UnitQuantity` no more than once in the referenced product

ram:UnitQuantity appears more than once in the referenced product. The element may appear no more than once in this section.

What to do
  1. Find ram:IncludedReferencedProduct in the invoice line’s product details.
  2. Check the ram:UnitQuantity elements inside it and remove any occurrences beyond the first.
  3. Generate the invoice again and validate it once more.
What it looks like
✗ Triggers the message 
<ram:IncludedReferencedProduct>
  <ram:UnitQuantity>1</ram:UnitQuantity>
  <ram:UnitQuantity>2</ram:UnitQuantity>
</ram:IncludedReferencedProduct>
✓ Correct 
<ram:IncludedReferencedProduct>
  <ram:UnitQuantity>1</ram:UnitQuantity>
</ram:IncludedReferencedProduct>
Technical details

The test counts the direct ram:UnitQuantity elements in ram:IncludedReferencedProduct and requires no more than one.

Where the rule applies

The rule applies within ram:IncludedReferencedProduct, which appears in the product details of an invoice line.

Context (rule/@context)
/rsm:CrossIndustryInvoice/rsm:SupplyChainTradeTransaction/ram:IncludedSupplyChainTradeLineItem/ ram:SpecifiedTradeProduct/ram:IncludedReferencedProduct
Test expression (assert/@test)
count(ram:UnitQuantity)<=1