FHIR Chat · Normative FHIR IG

Stream: methodology

Topic: Normative FHIR IG

AbdulMalik Shakir (Oct 07 2020 at 19:28):

Can an FHIR IG be balloted as normative if it is dependent on base resources that are not yet normative?

Grahame Grieve (Oct 07 2020 at 19:41):

the answer is yes, but there's some limits - you are bound to a specific version of FHIR, and changing the underlying version of FHIR means that you start over with a new implementation guide

Grahame Grieve (Oct 07 2020 at 19:42):

and it might not be a good decision to do this if the FHIR resources are not well proven

AbdulMalik Shakir (Oct 07 2020 at 20:57):

Thanks, @Grahame Grieve. Do you foresee a day when an IG might refer to content from more than one version of FHIR, say R4 and R5

Grahame Grieve (Oct 07 2020 at 20:58):

yes. it's on the todo list

Grahame Grieve (Oct 07 2020 at 20:58):

not near term though

AbdulMalik Shakir (Oct 07 2020 at 21:03):

So far my approach has been to adopt features from the higher version as extensions in the version I'm on. I did this with STU3 to R4. I can think of a scenario when I might want to do this with R4. to R5. It seems to work. Upgrading the entire IG from one version to the next can be a heavy lift for the simple difference in one resource.

Grahame Grieve (Oct 07 2020 at 21:12):

you are using the standard way to do these extensions?

AbdulMalik Shakir (Oct 08 2020 at 14:50):

Grahame Grieve said:

you are using the standard way to do these extensions?

I don't understand the question. Is there more than one way to do an extension?

Grahame Grieve (Oct 08 2020 at 19:37):

there's a standard extension URL for pre-adopting elements from later resources

Craig Newman (Oct 09 2020 at 18:07):

Is this the link for the standard extension? http://hl7.org/implement/standards/fhir/versions.html#extensions

Grahame Grieve (Oct 09 2020 at 18:29):

yes

Jose Costa Teixeira (May 03 2021 at 12:01):

I have 2 questions on this:

Are these versions in a valueset? I could only find https://www.hl7.org/fhir/valueset-FHIR-version.html but that contains 4.0.1 instead of 4.0
Can we use /5.0/.. already ? I need an extension on TestScript but I can pre-adopt an element that exists

Yunwei Wang (May 03 2021 at 14:19):

I saw both 4.0.0 and 4.0.1 image.png

Jose Costa Teixeira (May 03 2021 at 14:34):

@Yunwei Wang I meant the difference between 4.0 vs 4.0.0 (2 to 3 numbers)

Jose Costa Teixeira (May 03 2021 at 14:35):

the extension url uses the 2 numbers, not 3. And i don't know if there is a valueset with that

Jose Costa Teixeira (May 03 2021 at 20:09):

@Grahame Grieve would this be a valid extension URL to preadopt the TestScript.scope element?
http://hl7.org/fhir/5.0/StructureDefinition/extension-TestScript.scope