[ibr-086]-End date of line period (ibt-135) MUST be within invoice period (ibg-14).
ibr-086
cac:InvoiceLine/cac:InvoicePeriod | cac:CreditNoteLine/cac:InvoicePeriod
(cbc:EndDate <= xs:date(../../cac:InvoicePeriod/cbc:EndDate)) or not(cbc:EndDate) or not(../../cac:InvoicePeriod/cbc:EndDate)