For each object, the change numbers that have been used to change the object and that fulfill the criteria of the explosion profile (data limits and release key) are determined.

For change numbers with a fixed assigned date, the relative position of this date to the date limits in the explosion profile is determined. Such a change number can have values in interval, below, above, lower limit, or upper limit.

If a change number contains alternative dates, or if it has been defined for effectivity, it is marked as such.