Existing Wording: n/a

Proposed Wording: Unlike CDA, FHIR document context in the Composition class is defined locally to the composition class. Therefore confidentiality, subject, author, event and event period and encounter expressed in the Composition class apply generally to the composition and not specifically to the contained resources. As there is no context flow model in FHIR, each resource contained within a composition will express it's individual context. This is how FHIR supports the safe extraction of clinical content from the Composition.

Comment:

Once we move from V3, we again need to consider the safe expression of context that CDA R2 was required to incorporate as a result of its own ballot process.

FHIR compositions do not support context flow, so the context expressed in the compostion are not specificly true for the resources found within document.