The minimum number of times the group must appear or the minimum number of answers for a question - when greater than 1.

The maximum number of times the group must appear or the minimum number of answers for a question - when greater than 1 and not unlimited.

If true, indicates that the extended item should not be displayed to the user.

The type of data entry control or structure that should be used to render the item.

Identifies the desired orientation when rendering a list of choices (typically radio-box or check-box lists).

A reference to the Data Element that corresponds to the question text and answer constraints for this question.

Identifies a map that links the questionnaire (source) to a DataElement server and identifies which questions correspond to which data elements (by linkId and local identifier, respectively).

Where the type for a question is "Reference", indicates a type of resource that is permitted.

Where the type for a question is "Reference", indicates a profile that the resource instances pointed to in answers to this question must be valid against.

Identifies a filter to apply when looking up candidate answers for the question.

Describes the intended purpose of the rendered text. For example - instructions, guidance on access control, maintenance information, etc.

For questionnaires generated from FHIR profiles, indicates the FHIR data type or resource type that corresponds to this node.

For items of type reference, the reference can be populated either by picking an existing entity or by creating a new one. In the later case, this Questionnaire allows specifying the Questionnaire to use in creating the target instance. This can be direct (if the Reference is to a Questionnaire) or indirect via mapping if the Reference is to some other sort of resource.

Provides a computable unit of measure associated with numeric questions to support subsequent computation on responses.

The label to list in front of a code when presenting a list of possible values in a questionnaire-like fashion.

A numeric value that allows the comparison (less than, greater than) or other numerical manipulation of a concept (e.g. Adding up components of a score).

Unique identifier for a study protocol.

Identifies that the specified element should only appear in certain "modes" of operation.

A URL that resolves to additional supporting information or guidance related to the question.

StructureMaps that have this Questionnaire as 'target' - i.e. that can be used to create QuestionnaireResponses that are valid against this Questionnaire.

StructureMaps that have this Questionnaire as 'source' - i.e. that can be used to create other artifacts from QuestionnaireResponses that are valid against this Questionnaire.