Will add the following text to the Scope & Usage section for Questionnaire. In addition to its use as a means for capturing data, Questionnaires can also be useful as a mechanism of defining a standardized 'presentation' of data that might already exist.  For example, a peri-natal form or diabetes management form.  In this use, the benefit is to expose a large volume of data in a predictable way that can be defined outside the user-interface design of the relevant system.  The form might allow data to be edited or might be read-only.  In some cases, the QuestionnaireResponse might not be intended to be persisted.