The accompanying description of an observation within a report ingested from Health Report Manager,
preserved exactly as the source message carried it.
Elements / Details
Every element this profile touches, with its full definition. Element names in the tables link here.
The accompanying description of an observation within a report ingested from Health Report Manager,
preserved exactly as the source message carried it.
Present only when the source field was populated, and copied without normalisation, trimming or
validation.
Where it also appears in code depends on what else the message carried. With an accompanying
subclass present it is both the display on Observation.code.coding and code.text; without one it
is code.text alone. Preserving it here is what makes it readable without first working out which
of those happened.
Nexus EMR writes this today at
http://services.well.com/fhir/observation/hrm-accompanying-description (FHIR-372): it is live
in stored Observation.extension entries and in code, and is under migration to the canonical
declared here. Write the canonical; expect both until the migration completes.
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.
Accompanying description, verbatim from the source message
Definition
The accompanying description string as the source message carried it, unnormalised. Human-readable text rather than a code, and not guaranteed to correspond to any code the observation carries.