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Fix DTR docs: prefill is FHIRPath, not CQL #8

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Nesmeshnoy merged 1 commit into from
Jun 1, 2026
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Fix DTR docs: prefill is FHIRPath, not CQL #8

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6 changes: 3 additions & 3 deletions docs/prior-auth/dtr/README.md
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@@ -1,14 +1,14 @@
# DTR

Da Vinci Documentation Templates and Rules. DTR uses FHIR Questionnaire (with CQL-driven prefill and skip logic) to collect the clinical documentation a payer needs to decide a prior authorization.
Da Vinci Documentation Templates and Rules. DTR uses FHIR Questionnaire (with FHIRPath-driven prefill and skip logic) to collect the clinical documentation a payer needs to decide a prior authorization.

Payerbox supports two implementation paths.

| Page | Use case |
|---|---|
| [Aidbox as Questionnaire storage](aidbox-questionnaire-package.md) | Server-side packaging of Questionnaire and ValueSet bundles for client-side rendering |
| [DTR SMART App](dtr-smart-app.md) | EHR-launched SMART on FHIR app that renders the questionnaire and runs CQL client-side |
| [DTR SMART App](dtr-smart-app.md) | EHR-launched SMART on FHIR app that renders the questionnaire and prefills it client-side |

CQL execution happens on the client (the DTR SMART app or another DTR-aware client), not on Aidbox. Aidbox stores Questionnaire, ValueSet, and Library resources; [`$questionnaire-package`](../../api-reference/operations/questionnaire-package.md) returns a Bundle of the Questionnaire with its expanded ValueSets — referenced CQL Libraries are not currently included in the bundle.
Prefill runs on the client (the DTR SMART app or another DTR-aware client), not on Aidbox: the questionnaire's FHIRPath `initialExpression`s are evaluated client-side (SDC `$populate`), with no CQL engine. Aidbox stores the Questionnaire and ValueSet resources; [`$questionnaire-package`](../../api-reference/operations/questionnaire-package.md) returns a Bundle of the Questionnaire with its expanded ValueSets.

Both paths produce a QuestionnaireResponse that becomes input to [PAS](../pas.md).
4 changes: 2 additions & 2 deletions docs/prior-auth/dtr/aidbox-questionnaire-package.md
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Expand Up @@ -58,8 +58,8 @@ Accept: application/fhir+json
|---|---|---|
| Who renders the questionnaire | The client (EHR, third-party DTR app) | Payerbox-shipped SMART app |
| Launch mechanism | Direct API call | EHR SMART on FHIR launch |
| CQL execution | Client-side, by the DTR client | Client-side, inside the SMART app |
| Prefill execution | Client-side, by the DTR client | Client-side, inside the SMART app |

The operation is implemented as a subset of Da Vinci DTR STU 2.0.1; most notably, **CQL Libraries referenced by the Questionnaire are not bundled** — the rendering client must resolve them. Full parameter list, limitations, and examples: [`$questionnaire-package`](../../api-reference/operations/questionnaire-package.md).
The operation is implemented as a subset of Da Vinci DTR STU 2.0.1: it bundles the Questionnaire and its expanded ValueSets, and prefill uses the questionnaire's FHIRPath `initialExpression`s (no CQL). Full parameter list, limitations, and examples: [`$questionnaire-package`](../../api-reference/operations/questionnaire-package.md).

The QuestionnaireResponse produced by either path becomes the input to [PAS](../pas.md).
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