It is forbidden to use the names of metadata objects (and their attributes and tabular sections), which are used when naming query tables (for example, Document, Catalog).
Using such names can lead to errors in the execution of the query, and also make it difficult to use the query designer and reduce the clarity of the query text.
Wrong name
Catalog.Catalog
Catalog.MyCatalog.Attribute.Document
InformationRegister.MyRegister.Dimenssion.Documents