h-review
From Just Solve the File Format Problem
h-review (formerly hReview) is a draft standard intended to be one of several "microformats" released via the microformats.org site and community, intended for the representation of information in a manner that is human-readable but can still be processed by machines.
The format is intended for marking up reviews (e.g., of products and restaurants), using standard HTML tags which can be styled with CSS to be presented attractively to human readers, but are in a standardized format which can be processed electronically.
The original hReview format was for a single review, while the hReview Aggregate format was for summary data on each of a collection of reviews; the new h-review version doesn't seem to have this split.
