For example, in Switzerland, the canton of Vaud maintains the collection of the "Archives Cantonales Vaudoises". One of the objects in this collection is the register Ac 29. This register belongs to the sub-collection "A", which contains all the documents concerning the "Savoyard and episcopal period". More precisely, it belongs to the sub-sub-collection "Ac" which contains the documents relating to the "Bishopric, the chapter and the cathedral of Lausanne". It is the 29th document of this collection. In the example below, all these different levels are indicated.