The catalogue equivalent of strict microdata: declaring category and listing data as authoritative.
Where it helps
Large catalogues where Yandex holds competing data.
Sites whose listings change frequently.
Prerequisite
A reliable generation pipeline. This is not markup to add by hand.
Alien Road
Cómo lo aplicamos
Same rule as products: only where the data is trustworthy and generated. We would rather have accurate ordinary markup than authoritative wrong markup.