Comment:

AllergyIntolerance.event is confusing as documentation states that it's really an event or symptom representation, and not an event reporting system. Rename for clarity? In the future, will there be links to AdverseEvent? "This resource represents a condition of susceptibility to a substance, with a list of supporting events and/or symptoms, and has no direct relationship to an event reporting framework; this will be re-assessed when Adverse Event reporting resource(s) and/or profiles are added to FHIR (not expected to happen prior to DSTU 2)"