Does this packet lead with a generated cover page? (absent = not stated, NOT false)
Definition
Whether this attachment packet leads with a generated cover page in the outbound render.
Absent does not mean false. The value a packet starts with is decided per send channel, so an
absent extension records no choice at all -- neither that a cover page was wanted nor that it was
declined. Writers SHOULD state it explicitly in both directions; readers SHOULD treat absence as
"not stated" and fall back to their own channel default rather than to false.
The cover page is not a packet member. It is generated at render time from what the packet
already carries and never appears in List.entry, so a consumer counting members counts chart
items only.
Meaningful on an attachment packet (nexus-attachment-packet), and constrained to one: the
extension's contextInvariant requires the List it rides to carry an identifier under the
attachment-packet naming system, so it cannot legally be stamped on a template List or on any
other kind. It asserts nothing about any other kind of List because it cannot appear on one.
May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Comments
There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Source of the definition for the extension code - a logical name or a URL.
Comments
The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
true: the render leads with a generated cover page; false: it does not
Definition
Whether the outbound render of this packet begins with a generated cover page. Present-and-false is a recorded decision not to lead with one, and is distinct from the extension being absent, which records no decision.