2018-06-16 UTC
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[cjwillcock] a specific example: when adding new properties (p-*) to a newly used root context (h-*), given behaviour coded into javascript that is not distinguishing the new h-* context, and is applying the wrong behaviour in the new, different context. Consider: adding p-rating in an h-review-aggregate, where previous code has behaviour (and/or design) dependent on a p-rating in an h-review.