[aligned-ibrp-001-my]-Specification identifier (ibt-024) MUST start with the value 'urn:peppol:pint:selfbilling-1@my-1'.
aligned-ibrp-001-my
/ubl:Invoice | /cn:CreditNote
starts-with(normalize-space(cbc:CustomizationID/text()), 'urn:peppol:pint:selfbilling-1@my-1')