The date on which the period starts. The start dates counts as part of the period.

Namespace
cbc urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2
Data type
Date
udt:DateType
Example value
2018-05-28
Business terms
tir116-126
Rules
Identifier/Error message Flag
PEPPOL-T116-R004
If both delivery period start date and delivery period end date are given then the end date MUST be later or equal to the start date.
fatal