[BR-CL-17-GST-SG]-Invoice tax categories MUST be coded using valid Singapore code values
BR-CL-17-GST-SG
cac:TaxCategory/cbc:ID
( ( not(contains(normalize-space(.),' ')) and contains( ' SR SRCA-S SRCA-C ZR ES33 ESN33 DS OS NG SRRC SROVR-RS SROVR-LVG SRLVG ',concat(' ',normalize-space(.),' ') ) ) )