mozilla/openbadges-validator — pull request #12 by toolness (2013-08-26 16:39:31+00:00)
Title: Conditionally include a 'guid' property in info returned by validator.

The only situation this doesn't work for is when a raw 0.5.0-style assertion object is passed into the validator: since there's no way to know the URL at which the object is hosted, there's no way to provide a GUID.