Accuracy of the compositions

The accuracy of the compositions which are collected on this website are graded like this:

= the composition is unknown.

= the composition is supposed (so it is not confirmed by any observation).

= the composition has been observed once by only one person.

= the composition has been observed once by at least two persons or has been observed more than once by a same person.

= the composition has been observed every day by at least one person or is testified by official documents.