InstaGov/concepts/rating

About
A rating is a form of vote, but differs from traditional democratic voting in the following ways:
 * There is a maximum of one rating per answer, rather than one rating per user; users may rate every answer, or any subset.
 * Ratings can be negative (disapproval) as well as positive (approval)
 * Ratings are on a scale (e.g. -10 to +10) rather than being binary (yes/no)

In other words, a rating is essentially a range vote.