20181210 Community Meeting Minutes

Time: 10:00-11:00 UTC (11:00-12:00 CET, 05:00-06:00 EST, 21:00-22:00 AEDT) Location: Join Zoom Meeting https://zoom.us/j/573322038

R4 Progress

• Brian has worked on integrating his changes in a PR, Marco will integrate those into the main line next week
• Brian will cherrypick relevant things from the R4 PR into DSTU2, which we will then merge forwards.
• Michel is working on the snapshot generator - Ewout will make sure he works on the right branch (either marco's or Brian's R4 working branches).
• R4 will miss the 1.1-beta release, but we will probably have an alpha release ready before Christmas.

Markdown properties

• Brian discovered that representing Markdown props as strings makes it completely invisible for the developer to see whether he/she is dealing with Markdown or plain sting. Also, if in FHIR an element changes type from string to markdown, you will not get a compile error. Brian strongly suggests we should have the property be of type Markdown, and so have a single property (not prop::string + propElement::Markdown).
• The possible disadvantage is that this is inconsistent with what we do with FhirDateTime properties. We discover that the DateTime props should probably not have been strings - but we cannot fix that anymore. But let's not continue making that mistake -> we decide to have the Markdown props as a single property of type Markdown.

Version enum - representing enums starting with numbers

• We have enums for which the members start with a digit. Currently, Brian is generating members with the number written out, like FhirVersion "one_0_0". We look on Google and find the suggested approach is to use "_", so it becomes FhirVersion "_1_0_0".

Refactor of validator

• Ewout will continue work and schedule a meeting when there is something to report, prob. next week.

Meeting with MS team

We discussed how the MS team may contribute to the .NET API. Talked about focusing on:

• Review the new parsing/serialization serialization framework.
• Performance of the FhirPath engine
• Performance of the new parser/serializer.
• Turn improvements into PRs.

Agenda for next call

• Special enum value to use when parsing an unknown enum value
• New FHIR Http client (https://github.com/ewoutkramer/fhir-net-api/pull/727)
• How to start working on isolating poco-dependent code.

Action items

• Marco is going to change the FHIR .NET API pipeline to build and test Vonk for each update of the API.
• Brian will pull WebApi into a separate repository.
• Ewout to set up a targeted meeting to discuss these different interfaces for WebApi
• Brian will help on creating a section in the API docs on dealing with newer data for normative parts of the POCO's. (member may get removed, added, enums expanded upon etc.).
• Ewout will add a label to the GitHub project to earmark issues that require a breaking change.
• Ewout to schedule a meeting to show proposed changes to the internals of the validator
• Marco to deal with PR802 next week
• Brian will cherrypick relevant things from the R4 PR into DSTU2
• Ewout will check which branch Michel is working on to upgrade to snapshot generator.