The HZSCPARS macro provides functions dealing with parsing the check parameter string. It is intended to help only with parsing the parameter area for the check (as opposed to some general area) and it is of help only for parameter area syntaxes that follow a simple style, namely a combination of "PositionalValue" or "keyword=value" or "keyword=value1,...,valuen" or "keyword(value1,...,valuen)" items separated from each other by one or more blanks or a comma. If "PositionalValue" is found, all items must be of that positional format. If keyword/value format is found, no values of positional format are allowed. You should avoid extra separating commas, as two consecutive commas indicates a null positional value.