hCard is a microformat for publishing contact details in a structured way, based on the vCard standard. Yandex reads it for organisation data.
What it carries
Organisation name, address, phone, working hours.
Geographic coordinates.
Where it appears
In snippets for organisation sites and in Yandex Business, where the data is reviewed before publication.
Alien Road
So setzen wir das um
For Russian-market clients with physical locations we implement hCard alongside Schema.org rather than instead of it. The Yandex organisation pipeline still reads it, and the duplication costs nothing.