# ibr-068

Source: https://xmlvalid.com/rules/ibr-068

> GLN MUST have a valid format according to GS1 rules for endpoints (ibt-034), (ibt-049), party identification (ibt-029), (ibt-046), (ibt-060), legal entities (ibt-030), (ibt-047), (ibt-061).

- Level: error
- Rule sets: PINT Billing rules 1.1.3, PINT Billing rules (as shipped with PINT AE) 1.0.4
- Context: `cbc:EndpointID[@schemeID = '0088'] | cac:PartyIdentification/cbc:ID[@schemeID = '0088'] | cbc:CompanyID[@schemeID = '0088']`
- Test: `matches(normalize-space(), '^[0-9]+$') and u:gln(normalize-space())`

Validate a document against these rules: https://xmlvalid.com/validate