Extension: Filter to apply when looking up references

Connectathon 11 Snapshot

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Extension Filter to apply when looking up references - Detailed Descriptions

Detailed Descriptions for the elements in the extension.

Extension
Definition	Identifies a filter to apply when looking up candidate answers for the question.
Control	0..1
Type	Extension
Comments	The filter may include $subj and/or $encounter which should be substituted by the implementer with the subject and/or encounter id relevant in the context in which the questionnaire is being populated.
Invariants	Defined on this element inv-13: Allowed reference filter can only be specified for items of type 'reference' (xpath: parent::*/f:type/@value='reference')
Extension.id
Definition	unique id for the element within a resource (for internal references).
Control	0..1
Type	id
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 should be version specific. This will ideally be the URI for the Resource Profile defining the extension, with the code for the extension after a #.
Fixed Value	http://hl7.org/fhir/StructureDefinition/questionnaire-referenceFilter
Extension.valueString
Definition	Value of extension - may be a resource or one of a constrained set of the data types (see Extensibility in the spec for list).
Control	1..1
Type	string