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