FHIR field reference
Alongside these guides, the builder ships with an interactive FHIR Field Reference — a searchable table of every FHIR R4 / SDC field and extension the builder knows about, and exactly where to configure it in the UI.
Opening it
From the app, open More ▾ → FHIR Reference. It also opens as a standalone
page at help.html.
What's in it
Each row lists:
- the FHIR field or extension (e.g.
Questionnaire.item.required,item.extension[questionnaire-hidden].valueBoolean); - a short description of what it does;
- where in the UI it lives (which modal or control);
- how to access it (the exact clicks).
A search box filters the table by field name, extension, or keyword, so you can answer "where do I set X?" in seconds.
When to use which
- Use this documentation for concepts and step-by-step tasks.
- Use the FHIR Field Reference when you already know the FHIR field you want and just need to find its control in the builder.
- See FHIR mapping & round-trip fidelity for how the builder's data model maps to FHIR overall.