CII-DT-097
Date time string with format attribute 102 shall be YYYYMMDD.
error: the document is invalid
What the rule checks
As the rule set's publisher wrote it. The rule runs on every element the context matches, and fails where the test is false; the validator reports the line of that element.
EN 16931 rules (CII) 1.3.17
EN 16931 rules 1.3.16 (CII) 1.3.16
EXTENDED-CTC-FR rules (CII) 1.4.0.04
Factur-X EXTENDED rules 1.09.2
Context
//udt:DateTimeString[@format = '102']Test
matches(.,'^\s*(\d{4})(1[0-2]|0[1-9]){1}(3[01]|[12][0-9]|0[1-9]){1}\s*$')Checked with EN 16931 Invoice (CII)