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 (Unlicensed)

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ML makes the case that unpublished content is not legitimate SNOMED and suggested using a not-SNOMED URI eg  http://snomed.info/xsct/45991000052106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

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 (Unlicensed)

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