FHIR Chat · nesting extensions · conformance

Stream: conformance

Topic: nesting extensions

David Hay (Jun 06 2019 at 05:05):

Has anyone created an extension that is nested more than 2 levels? In theory you can go as deep as you like, but more than 2 seems implementer unfriendly...

Grahame Grieve (Jun 06 2019 at 05:20):

right

Josh Mandel (Jun 08 2019 at 03:44):

(Frankly two is already pretty painful to work with.)

Thomas Tveit Rosenlund (Nov 01 2019 at 13:19):

Has anyone created an extension that is nested more than 2 levels? In theory you can go as deep as you like, but more than 2 seems implementer unfriendly...

I did make this, and I am not particularly proud of it:

<extension url="http://ehelse.no/fhir/StructureDefinition/gd-person-status">
        <extension url="fregPersonStatus">
            <valueCode value="bosatt"/>
        </extension>
        <extension url="http://ehelse.no/fhir/StructureDefinition/gd-fregmetadata">
            <extension url="registeredTimestamp">
                <valueDateTime value="2019-09-05T11:17:43.399+02:00"/>
            </extension>
            <extension url="currentInfo">
                <valueBoolean value="true"/>
            </extension>
            <extension url="source">
                <valueString value="KILDE_DSF"/>
            </extension>
            <extension url="validFrom">
                <valueDateTime value="2019-09-05T11:17:43.399+02:00"/>
            </extension>
        </extension>
    </extension>

The big problem is that I can't make it validate. And I can't figure out why. @David Hay @Grahame Grieve

The official validator claims there is no matching slice for the nested extension "http://ehelse.no/fhir/StructureDefinition/gd-fregmetadata":

Success...validating gd-Person-04021950128-version-2.xml:  error:0 warn:0 info:1
  Information @ Person.extension[0].extension[1] (line 10, col78) : This element does not match any known slice for the profile http://ehelse.no/fhir/StructureDefinition/gd-person-status

The full example as well as the conformance resources are posted on GitHub: https://github.com/HL7Norway/Grunndata-profiles

Grahame Grieve (Nov 01 2019 at 20:24):

is that today? or before the upgrade?

Grahame Grieve (Nov 01 2019 at 20:25):

validating extension slices is generally a problem right now after the technical corrections - I'll be working on fixing that today

Eric Haas (Nov 02 2019 at 00:02):

(deleted)

Thomas Tveit Rosenlund (Nov 05 2019 at 08:34):

is that today? or before the upgrade?

Yes that was november 1, downloaded the new validator today v4.0.31. And still get this error on the example: https://github.com/HL7Norway/Grunndata-profiles/blob/master/examples/gd-Person-04021950128-version-2.xml

Grahame Grieve (Nov 08 2019 at 05:09):

can you add it as a test case to https://github.com/FHIR/fhir-test-cases/validator ?

Keith Boone (Nov 08 2019 at 07:02):

Has anyone created an extension that is nested more than 2 levels? In theory you can go as deep as you like, but more than 2 seems implementer unfriendly...

I did make this, and it's just as unfriendly, but generally computable and easy to generate. Not even going to try to validate it though. I use it internally to show me how something got produced when mapping from V2 to FHIR, it never goes beyond my converter.

        <reference value="DiagnosticOrder/efe37c6bacb5-b8a8-4121-a12f-af41419e">
              <extension url="http://ainq.com/fhir/v2/target">
                 <extension url="Path">
                    <valueUri value="#subject"></valueUri>
                 </extension>
                 <extension url="Source">
                    <extension url="Location">
                       <valueString value="/PATIENT_RESULT(0)/ORDER_OBSERVATION(0)/COMMON_ORDER/ORC"></valueString>
                    </extension>
                    <extension url="Rule">
                       <valueString value="ORC->DiagnosticOrder"></valueString>
                    </extension>
                 </extension>
                 <extension url="Source">
                    <extension url="Location">
                       <valueString value="/PATIENT_RESULT(0)/PATIENT/PID"></valueString>
                    </extension>
                    <extension url="Rule">
                       <valueString value="PID->Patient"></valueString>
                    </extension>
                 </extension>

Thomas Tveit Rosenlund (Nov 11 2019 at 11:38):

can you add it as a test case to https://github.com/FHIR/fhir-test-cases/validator ?

I could do that, but I don't think it would be very helpful without all the relevant profiles that example actually relies on:
https://github.com/HL7Norway/Grunndata-profiles/tree/master/for-validation-gd-r4

Last updated: Apr 12 2022 at 19:14 UTC