core + meta (Meta Extension): terms used within schema.org for schema definitions.

downvoteCount

Canonical URL: http://schema.org/downvoteCount

Thing > Property > downvoteCount

The number of downvotes this question, answer or comment has received from the community.

Usage: Between 100 and 1000 domains
Values expected to be one of these types
Integer
Used on these types
Comment
Question

Schema Version 3.4