Exactly one ram:URIID for email communication

Error FX-SCH-A-000713 Factur-X

Element 'ram:URIID' must occur exactly 1 times.

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

ram:URIID is missing from ram:EmailURIUniversalCommunication or occurs more than once. The element must appear exactly once.

What the rule means

The XML structure requires exactly one ram:URIID within the contact’s email communication information. An absent or repeated value does not meet this structural requirement.

Please provide exactly one `ram:URIID` for email communication

The contact’s email communication information is missing ram:URIID, or it contains it more than once. Providing exactly one ram:URIID resolves this issue.

What to do
  1. Locate ram:URIID within ram:EmailURIUniversalCommunication.
  2. Ensure that ram:URIID occurs exactly once.
  3. Generate the invoice again and validate it.
What it looks like
✗ Triggers the message 
<ram:EmailURIUniversalCommunication/>
✓ Correct 
<ram:EmailURIUniversalCommunication>
  <ram:URIID>contact@example.com</ram:URIID>
</ram:EmailURIUniversalCommunication>
Technical details

The check verifies that exactly one direct ram:URIID element is present in the rule context.

Where the rule applies

The rule applies to ram:URIID within the ram:EmailURIUniversalCommunication element of ram:DefinedTradeContact for ram:ProductEndUserTradeParty.

Context (rule/@context)
/rsm:CrossIndustryInvoice/rsm:SupplyChainTradeTransaction/ram:ApplicableHeaderTradeAgreement/ ram:ProductEndUserTradeParty/ram:DefinedTradeContact/ram:EmailURIUniversalCommunication
Test expression (assert/@test)
count(ram:URIID)=1