Guidance hints

[lognaturel]

Add support for the guidance form for labels. This is used to provide additional guidance about a question that isn't always needed and so is collapsed by default.

User docs: https://docs.getodk.org/form-language/, https://docs.getodk.org/collect-settings/#show-guidance-for-questions
Spec: bottom of https://getodk.github.io/xforms-spec/#languages

XLSForm

Collect

Enketo

[latin-panda]

@alyblenkin is this the same as the tooltips?

[lognaturel]

I updated the issue to link to the spec! It's not an essential or very common feature so while it's necessary to support the full form spec, I think it's a good example of something we could add shortly after a 1.0 release. At the same time, it's probably a quick win so we could also prioritize on that basis.

I was surprised to see that the guidance text form actually is displayed already:

I assume any unknown text form would be treated this way for now?