Context

The textual description of the qrs-1 business invariant is confusing and implies something other than the intent and expression of the constraint.

qrs-1 Description: "Nested item can't be beneath both item and answer"

qrs-1 Expression: (answer.exists() and item.exists()).not()[
https://www.hl7.org/fhir/questionnaireresponse.html#invs
]

The constraint is intended to ensure that an item cannot have both another 'item' and an 'answer ' as child nodes. The current description doesn't convey that accurately.

Done When

The description of qrs-1 should convey a concept aligned with the expression and intent.

Proposed

'Item cannot contain both item and answer'