VRBL-INV-CORE-444

Basic Info

Rule	If both Invoice Line Invoice Start Date and Invoice Line Invoice End Date are given then the Invoice Line Invoice End Date must be later or equal to the Invoice Line Invoice Start Date.
Context	`/ubl:Invoice/cac:InvoiceLine/cac:InvoicePeriod`
Pattern	vrbl-invoice-core
Severity	fatal

Implementation

not(boolean(cbc:StartDate)) 
or 
not(boolean(cbc:EndDate))
or 
number(
	concat(
		substring(cbc:EndDate, 1, 4),
		substring(cbc:EndDate, 6, 2),
		substring(cbc:EndDate, 9, 2)
	)
)
>=
number(
	concat(
		substring(cbc:StartDate, 1, 4),
		substring(cbc:StartDate, 6, 2),
		substring(cbc:StartDate, 9, 2)
	)
)