Use this radio button to determine if there is a unique value in the counter at a particular time, or by month or by year, financial year or accounting period.
To avoid duplication, this assumes that the appropriate components are defined in the counter, specifically for the year, the month, the week or the day.
This field combined with the Definition level field with the use of an additional field code (see Additional field) defines how many numbering sequences will be assigned to the sequence number counter (this will be a unique sequence for a sequence by month, by site and by additional value).
As a function of these two values, it is possible to introduce components to avoid duplication of numbers. In this way for example, if an annual RTZ level is defined, the year must be a component of the sequence number series. Similarly, if the sequence number series is defined by company, the site or company must be a component of the sequence number series.