This subordinated observation used by the allergy observation records information
about the current status of an allergy or intolerance, for example, whether it is
active, in remission, resolved, et cetera.
Context
Parent nodes of template element with id 2.16.840.1.113883.10.22.4.21
The <text> element is required and points to the text describing the problem being
recorded; including any dates, comments, et cetera. The <reference> contains a URI
in value attribute. This URI points to the free text description of the problem in
the document that is being described.
The code attribute of <statusCode> for all clinical status observations shall be completed.
While the <statusCode> element is required in all acts to record the status of the
act, the only sensible value of this element in this context is completed.