PACIO Advance Directive Interoperability Implementation Guide
0.1.0 - STU 1 Ballot

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## Extension: PerformerExtension - Detailed Descriptions

Definitions for the padi-performer-extension extension.

1. Extension
Definition | The Advance Directive Information Performer Extension represents clinicians who actually and principally carry out the clinical services being documented. In a transfer of care this represents the healthcare providers involved in the current or pertinent historical care of the patient. Preferably, the patients key healthcare care team members would be listed, particularly their primary physician and any active consulting physicians, therapists, and counselors.
Control | 0..* This element is affected by the following invariants: ele-1
Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (: extension.exists() != value.exists())
2. 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
3. Extension.extension
Definition | An Extension
Control | 0..0
Type | Extension
Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (: extension.exists() != value.exists())
Slicing | This element introduces a set of slices on Extension.extension. The slices are unordered and Open, and can be differentiated using the following discriminators: value @ url
4. 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/us/pacio-adi/StructureDefinition/padi-performer-extension
5. Extension.value[x]
Definition | Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Control | 1..1
Type | Reference
[x] Note | See Choice of Data Types for further information about how to use [x]
Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
Slicing | This element introduces a set of slices on Extension.value[x]. The slices are unordered and Closed, and can be differentiated using the following discriminators: type @ $this
6. Extension.value[x]:valueReference
SliceName | valueReference
Definition | Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Control | 1..1
Type | Reference(USCorePractitionerProfile | USCorePractitionerRoleProfile)
[x] Note | See Choice of Data Types for further information about how to use [x]
Must Support | true
Must Support Types | No must-support rules about the choice of types/profiles
Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))