VRBL-INV-CORE-444

Basic Info

Rule	If both Invoice Line Period Start Date and Invoice Line Period End Date are given then the Invoice Line Period End Date must be later or equal to the Invoice Line Period 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)
	)
)