Message

Complete cart indicator should be either true or false.

Context
cbc:ActionCode
Test
( ( not(contains(normalize-space(.),' ')) and contains( ' true false ',concat(' ',normalize-space(.),' ') ) ) )
Usage
/ ubl:Catalogue / cac:CatalogueLine / cac:RequiredItemLocationQuantity / cac:Price / cbc:BaseQuantity / @unitCode