Message

Value MUST be part of code list 'Boolean indicator (openPEPPOL)'.

Context
/ubl:Catalogue/cac:CatalogueLine/cbc:OrderableIndicator
Test
(some $code in $clTrueFalse satisfies $code = normalize-space(text()))
Code lists
Boolean indicator (openPEPPOL)
Usage
/ ubl:Catalogue / cac:CatalogueLine / cbc:OrderableIndicator