Stream: questionnaire
Topic: Conformance expectations
Lloyd McKenzie (Dec 08 2021 at 15:56):
Da Vinci is looking to require SDC questionnaires for their DTR (Documentation, Templates and Rules) IG and are creating profiles on Questionnaire to reflect their specific requirements - specifically drawing on the rendering, behavior and expression population forms. However, in all cases they've opted to make elements that SDC has marked as "mustSupport" optional (i.e. mustSupport=false). This has me wondering about whether we should be loosening some of our expectations. The specific profile elements they've opted to loosen - at least for now - are:
Rendering: displayCategory, entryFormat
Behavior: maxDecimalPlaces, maxOccurs, maxValue, minLength, minOccurs, minValue, ordinalValue, readOnly/expression, regex, repeats/expression, required/expression, text/expression, toggleExpression, usageMode, valueSet/expression
Population: itemPopulationContext, unit
Lloyd McKenzie (Dec 08 2021 at 15:56):
Any thoughts?
Diane (Dec 08 2021 at 22:34):
I think that if the core SDC spec makes too many of the newer/better/cooler features (such as toggleExpression or itemPopulationContext)of questionnaires optional, then there won't be as much uptake for those elements. I think that part of the FHIR evolution is to gradually and continuously improve the core spec so that the elements will be ready and available for a variety of use cases. Since Da Vinci seems to be able to adequately limit usage of elements using a profile, I don't see a need to change the SDC conformance expectations. However, it might be interesting to discuss creating a standard SDC-lite profile, with the minimum required elements to make a minimally functioning questionnaire.
Tilo Christ (Dec 09 2021 at 00:01):
I will probably think about this some more, but for now there are two items on that list which catch my attention:
- displayCategory - I have it implemented, but feel that similar effects could be achieved with item controls (prompt, and help), and the new itemMedia extension.
- itemPopulationContext: as a lightweight, mobile filler I feel I should be able to be conformant even if I leave all the heavy-lifting of advanced population to the server. In essence, I want to be able to pull a Questionnaire and a corresponding QuestionnaireResponse from the server, populate the QR into the Questionnaire, present it in a high fidelity, dynamically updated rendition for filling, send the resulting QR back to the server and be conformant.
Not on the above list, but also coming from the lightweight mobile filler scenario: 3 expression engines (network query, FHIRPath, CQL) is a lot. I have yet to come across a questionnaire where I needed the power of CQL.
In conclusion: I wouldn't ask for an "SDC-lite" profile, but maybe something that offers a good set of functionality that can be implemented well on a mobile platform with limited compute power, limited network, limited application size, small screen (affecting support for some of the item-controls on group), and great support for different keyboard types. Plus maybe an ability to indicate that an attachment should come from the camera.
Lloyd McKenzie (Dec 09 2021 at 06:36):
The issue is that, right now, Da Vinci isn't conformant against the SDC profiles, it merely aligns with them. Defining profiles that define a desired target doesn't necessarily buy much if the result is everyone goes off and defines their own profile.
Lloyd McKenzie (Dec 09 2021 at 06:37):
Unless there's broad consensus on loosening things, we'll probably leave everything "as is" in this release. However, in the next release, we should seriously consider a few levels of profiles to better allow systems to conform without doing 'everything'.
Brian Postlethwaite (Dec 10 2021 at 07:58):
There's going to be levels of everything here...
Brian Postlethwaite (Dec 10 2021 at 07:59):
I'm working towards how to render and compare conformance for this.
Soncan know that out renderer/server can use questionnaire X. And also compare to alternative systems/renderers.
Last updated: Apr 12 2022 at 19:14 UTC
