# UBL-DT-23

Quoted from a public specification. This page is not a validator, and it is not tax, legal, or accounting advice.

- Country: EU
- Syntax: UBL
- Severity: warning
- Statement language: en
- Last verified: 2026-10-18

## Official statement

> Uri attribute should not be present

Source: https://docs.peppol.eu/poacc/billing/3.0/rules/ubl-tc434/UBL-DT-23/

Peppol BIS Billing 3.0, May 2026 release, EN 16931 model bound to UBL

Severity note: warning, from the Flag column of the Peppol BIS Billing 3.0 UBL rules index retrieved 2026-10-18.

## Plain-language reading

A Uri attribute should not be present. The statement has no period and says should not. It does not say shall. It is 35 characters. The statement spells Uri with a capital U. The flag is warning. The context is the same string as BR-CO-18. The published test is not(//@uri). The attribute name is lowercase. It does not call count and it does not call exists.

## What to change

Leave the uri attribute off the document.

## Illustration

Illustration of the condition in the official statement. Not an example published by the source.

**Fails the stated condition.** The document includes a uri attribute.

**Passes the stated condition.** The document includes no uri attribute.

## Published context and test

Copied from the source. Not reimplemented on this page.

```
/ubl:Invoice | /cn:CreditNote
```

```
not(//@uri)
```

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