The most important examples of class formations (arranged roughly in order of difficulty) are as follows:

The examples below are roughly arranged in chronological order, although some heterogeneous texts are of uncertain dates.

They seemed to be arranged roughly in order of rank, with the white-belts at one end and the black-belts at the other.

The volcano has a roughly arranged crater in which the northern, eastern and southern part are deforested.

In the 1751 printed edition, the various movements are roughly arranged by increasing order of sophistication of the contrapuntal devices used.

They are arranged roughly in ascending price.

His ships were roughly arranged in a wide protective diamond around the flagship.

The values below are arranged roughly in ascending order by number of days, although in some cases the mean had to be inferred.

The poems are arranged roughly in chronological order, from the start of the war to the end.

The examples below, limited to books with English translations, are roughly arranged in chronological order, although some heterogeneous texts have uncertain dates of composition.