Extension: Implemented CDE

STU 3 Ballot

This page is part of the FHIR Specification (v1.6.0: STU 3 Ballot 4). The current version which supercedes this version is 5.0.0. For a full list of available versions, see the Directory of published versions

Extension Implemented CDE - Detailed Descriptions

Detailed Descriptions for the elements in the extension.

Extension
Definition	A reference to the Data Element that corresponds to the question text and answer constraints for this question.
Control	0..1 This element is affected by the following invariants: ele-1
Comments	If a code applies to a question, that code should still be conveyed on the question, even if the same code is also referenced as a DataElement.code in the referenced data element. This extension must not be used in place of specifying the Questionnaire.item.concept element.
Invariants	Defined on this element ele-1: All FHIR elements must have a @value or children (xpath: @value\|f:\|h:div) ext-1: Must have either extensions or value[x], not both (xpath: exists(f:extension)!=exists(f:[starts-with(local-name(.), 'value')])) inv-9: Data Element references can't be specified for "display" items (xpath: not(parent::*/f:type/@value='display'))
Extension.id
Definition	unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Control	0..1
Type	string
Extension.extension(extension)
Definition	An Extension
Control	0..0
Type	Extension
Extension.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Control	1..1
Type	uri
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Fixed Value	http://hl7.org/fhir/StructureDefinition/questionnaire-deReference
Extension.valueReference
Definition	The formal description of a single piece of information that can be gathered and reported.
Control	1..1
Type	Reference(DataElement)
Alternate Names	Master Observation, Data Element, CDE
Comments	Often called a clinical template.