The stock can be arranged according to its size. You measure the size of the individual specimens and assign them to different groups according to their height and width.
Formal criteria of the list - one then speaks of mechanical list - are, for example, the processing date ( numerus currens list ) or the author's name.
In the systematic listing , the copies are assigned to a subject under which it is listed.
The group constellation combines the mechanical and the systematic constellation by first assigning the books to subject areas and sorting them within the subject areas according to formal criteria (such as numerus currens). The group constellation is mainly used today for freehand constellations .
Klaus Gantert, Rupert Hacker : Basic library knowledge , 8th edition, Saur, Munich 2008, pp. 229–236
Dietmar Strauch, Margarete Rehm: Lexicon book, library, new media , 2nd, updated and expanded edition, Saur, Munich 2007, ISBN 978-3598117572 , p. 83