Existing Wording: All documents have the same structure: a Bundle of resources of type "document" that has a Composition resource as the first resource in the bundle, followed by a series of other resources referenced from the Composition resource that provides guidance on how they fit together.

Proposed Wording: All documents have the same structure: a Bundle of resources of type "document" that has a Composition resource, as well as other resources referenced from the Composition resource, that provides guidance on how they fit together.

Comment:

JSON arrays cannot guarantee order, so functionality in the specification should not depend on ordered content.