In accordance with the national PinYin standard, the separator (') is supported to avoid ambiguous interpretations of PinYin strings. For example, the PinYin string [jiang] can be interpreted as [jiang] or [ji][ang]. Both spellings are valid. In New QuanPin, however, [jiang] is interpreted only as [jiang]. You must use the separator and enter [ji'ang] for the string to be interpreted as [ji] and [ang]. New ShuangPin does not require the use of separators.