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Disappearing Concept code? #25

Closed okeefm closed 6 years ago

okeefm commented 6 years ago

When I look at an Element like BreastCancerStage, which includes 0..1 StageTimingPrefix; the Value of that timing element gets mapped onto the BreastCancerStage element, but the Concept code defined in the timing element appears to disappear. Is this intentional?

Link: http://build.fhir.org/ig/HL7/us-breastcancer/StructureDefinition-oncology-BreastCancerStage.html (view oncology-StageTimingPrefix-extension)

CIMPL from the topic-context branch:

EntryElement:   BreastCancerStage
Based on:       EvaluationResultRecorded  // maps to FHIR Observation
Concept:        LNC#21908-9
Description:    "<description>"
0..1            StageTimingPrefix
(rest of element)

    Element:        StageTimingPrefix
Concept:        SCT#260869008 "Timing of stage"
Description:    "<description>"
Value:          CodeableConcept from StageTimingPrefixVS

Screenshot:

screen shot 2018-03-28 at 7 38 07 am

The SNOMED code 260869008 appears in the StageTimingPrefix element's CIMPL, but not in the IG; this is the discrepancy I'm asking about here.

cmoesel commented 6 years ago

Yes, this is expected. The Concept of a CIMPL element is definitional. It provides an external reference to the semantic meaning of the element. It only shows up in the FHIR profiles if it is explicitly mapped to something (which in this case, it is not).