The element <quantityTolerance> contains a decimal tolerance value, the type of tolerance, and an optional unit of measure. The tolerance value must conform to the W3C XML standard for decimal values which requires to use a period [.] for the separator between the integral part and the fractional part, and no thousands separator. The display format is not specified in the XML code, but must conform to program or country requirements at presentation. Refer to Chap 3.9.1 for presentation rules.