Add specialties to provider

Hi everyone, I’m developing an application that connects to OpenMRS. I’m currently using the OpenMRS RefApp for development. I’m wondering if there is a place to enter provider specialties, like if the provider is cardiologist or psychologist or social worker??

I’ve found that there is something called provider attribute types, so I’ve created one of Specialy, but I cant find any specific documentation or example about how to use provider attribute types for this specific purpose.

Anyone has any insight on this? there is another way to enter provider specialties? maybe as a person attribute? there is a UI where the site admin can configure this?

Any help is appreciated. Thanks