Welcome and introductions

2

@Peter Williams

@Rob Hausam

Recording, notes & attendance.

Summary of previous week and previous fortnight

5

@Peter Williams

@Rob Hausam

• 2020-04-28 - SNOMED on FHIR Meeting (TB)

• 2020-04-21 - SNOMED on FHIR Meeting (TS)

Other Meetings

10

@Peter Williams

Upcoming events:

SNOMED International April Business Meeting may or may not happen. In the event of the slot being available, this meeting can go ahead.

San Antonio HL7 Meetings + Connectathon May 16 -17 Cancelled. Virtual connectathon being discussed. Update 7 April: See https://confluence.hl7.org/display/FHIR/2020-05+Terminology+Services+Track

April 14: HL7 FHIR Connectathon is going to run May 13-14-15, a 24 h event.

https://confluence.hl7.org/display/FHIR/2020-05+Connectathon+24

FHIR Dev Days also an online event.

SI Business + Expo October. Discuss SNOMED on FHIR Presentation.

GPS and FHIR value set url(s)

15

@Rob Hausam

@Peter Jordan

https://chat.fhir.org/#narrow/stream/179202-terminology/topic/Indicating.20in.20a.20ValueSet.20.20SNOMED.20CT.20GPS.20.20Codes

What module(s) to use for the Canadian Edition

10

@Peter Williams

List of SNOMED CT Edition URIs

ECL in the Valueset Expression Extension

10

@Rob Hausam

Check whether SNOMED ECL is (or should be) registered as a MIME type (as per RFC 4289/BCP 13), or alternatively added to the expression-language code system and value set, for use in the valueset-expression extension used with the ValueSet resource.

Behaviour on calling the base URL

10

@Peter Williams

https://temp-snowstorm.ihtsdotools.org/fhir

Working with unversioned content

15

@Peter Williams

@Daniel Karlsson

Proposed example: http://localhost:8080/fhir/ValueSet/$expand?url=http://snomed.info/sct/45991000052106/version/UNVERSIONED?fhir_vs=isa/27624003&designation=sv

ML makes the case that unpublished content is not legitimate SNOMED and suggested using a not-SNOMED URI eg  http://snomed.info/xsct/45991000052106

FHIR Server Federation

@michael lawley

Use case for fall back lookup when server does not know the answer to any particular question eg a façade server which has knowledge of all services it could potentially delegate to.

Behaviour on Lookup

10

What properties are returned?

Discussion: Both Ontoserver and Snowstorm are returning EffectiveTime which is not listed here (unlike other SNOMED specifics): https://build.fhir.org/snomedct.html

Point of interest: Grahame's server returns a copyright property.

Update 7 April - Question about whether this is required / desirable?

Language Reference Sets in FHIR

45

All

Mechanisms for working with Languages

Designation extension

SNOMED Family of Languages

10

@Peter Jordan

@michael lawley

Impact of proposed changes (eg text searching in ECL) on FHIR. Questions around which language reference sets to use when there are multiple, especially partial/overriding context (referred to MAG for discussion)

SNOMED FHIR Implementation Guide

60

@Peter Williams

Implementation Guide for using SNOMED CT with FHIR.

Update 10 Dec: DK - main problem is URI/Ls which publisher has fixed ideas about. Publisher does not examine all folders - looks in profiles but not subfolders and doesn't seem to look in ValueSet folder.

Update 21 Jan: DK and RH have merged commits and these can be seen in the HL7 server build: http://build.fhir.org/ig/IHTSDO/snomed-ig/branches/new-template/ and build errors here: http://build.fhir.org/ig/IHTSDO/snomed-ig/branches/new-template/qa.html

Update 11 Feb: Grahame said that he'd show us how to set the URI so that it doesn't have to follow the base URI. Next person to try that can we fire a Zulip off to ask about it?

IG Documentation: http://build.fhir.org/ig/FHIR/ig-guidance/index.html

Also look at the sample IG https://github.com/fhir/sample-ig see build http://build.fhir.org/ig/FHIR/sample-ig/

Any other business

API for FHIR Resource ↔ Post coordinated expression mapping

@Peter Williams

API for FHIR Resource to SNOMED Expression

Looking up an SCTID in an unknown module

@Peter Williams

Problems when dependencies do not align. Multiple code system resources represent multiple editions / versions.

ML: See code parameter to code system search. Should return code systems (ie versions) where that code is defined. International concepts would appear in every edition known to the server.

eg /CodeSystem?system=htp://snomed.info/sct&code=12345678&_elements=version

GPS

See Discussion on Global Patient Set (GPS)

FHIR Shorthand

@michael lawley

https://github.com/HL7/fhir-shorthand/wiki

https://build.fhir.org/ig/HL7/fhir-shorthand/FSHQuickReference.pdf

Tooling: https://github.com/FHIR/sushi

$lookup operation - properties returned

@Peter Jordan

Using http://ontoserver.csiro.au/vstool/  I noticed that both Ontoserver and SnowStorm return a SNOMED CT $lookup property for effectiveTime, which I don't see listed, as one of the SNOMED CT properties in the FHIR R4 specification at http://hl7.org/fhir/snomedct.html. Should we create a Jira TIcket to add this?

Completed - https://jira.hl7.org/browse/FHIR-26555