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Infrastructure And Messaging Work Group Maturity Level : 4   Trial Use Security Category : Not Classified Compartments : Device , Practitioner

Detailed Descriptions for the elements in the MessageHeader resource.

MessageHeader
Element Id MessageHeader
Definition

The header for a message exchange that is either requesting or responding to an action. The reference(s) that are the subject of the action as well as other information related to the action are typically transmitted in a bundle in which the MessageHeader resource instance is the first resource in the bundle.

Cardinality 0..*
Type DomainResource
Requirements

Many implementations are not prepared to use REST and need a messaging based infrastructure.

Summary true
MessageHeader.event[x]
Element Id MessageHeader.event[x]
Definition

Code that identifies the event this message represents and connects it with its definition. Events defined as part of the FHIR specification have the system value "http://terminology.hl7.org/CodeSystem/message-events". Alternatively uri to the EventDefinition.

Cardinality 1..1
Terminology Binding the Event List in the messaging framework
Type Coding | uri
[x] Note See Choice of Data Types for further information about how to use [x]
Requirements

Drives the behavior associated with this message.

Summary true
Comments

The time of the event will be found in the focus resource. The time of the message will be found in Bundle.timestamp .

MessageHeader.destination
Element Id MessageHeader.destination
Definition

The destination application which the message is intended for.

Cardinality 0..*
Requirements

Indicates where message is to be sent for routing purposes. Allows verification of "am I the intended recipient".

Summary true
Comments

There SHOULD be at least one destination, but in some circumstances, the source system is unaware of any particular destination system.

MessageHeader.destination.name
Element Id MessageHeader.destination.name
Definition

Human-readable name for the target system.

Cardinality 0..1
Type string
Requirements

May be used for routing of response and/or to support audit.

Summary true
MessageHeader.destination.target
Element Id MessageHeader.destination.target
Definition

Identifies the target end system in situations where the initial message transmission is to an intermediary system.

Cardinality 0..1
Type Reference ( Device )
Requirements

Supports multi-hop routing.

Summary true
MessageHeader.destination.endpoint
Element Id MessageHeader.destination.endpoint
Definition

Indicates where the message should be routed to.

Cardinality 1..1
Type url
Requirements

Identifies where to route the message.

Summary true
Comments

The id may be a non-resolvable URI for systems that do not use standard network-based addresses.

MessageHeader.destination.receiver
Element Id MessageHeader.destination.receiver
Definition

Allows data conveyed by a message to be addressed to a particular person or department when routing to a specific application isn't sufficient.

Cardinality 0..1
Type Reference ( Practitioner | PractitionerRole | Organization )
Patterns Reference(Practitioner,PractitionerRole,Organization): Common patterns = Participant
Requirements

Allows routing beyond just the application level.

Summary true
MessageHeader.sender
Element Id MessageHeader.sender
Definition

Identifies the sending system to allow the use of a trust relationship.

Cardinality 0..1
Type Reference ( Practitioner | PractitionerRole | Organization )
Patterns Reference(Practitioner,PractitionerRole,Organization): Common patterns = Participant
Requirements

Allows routing beyond just the application level.

Summary true
Comments

Use case is for where a (trusted) sending system is responsible for multiple organizations, and therefore cannot differentiate based on source endpoint / authentication alone.

MessageHeader.enterer
Element Id MessageHeader.enterer
Definition

The person or device that performed the data entry leading to this message. When there is more than one candidate, pick the most proximal to the message. Can provide other enterers in extensions.

Cardinality 0..1
Type Reference ( Practitioner | PractitionerRole )
Patterns Reference(Practitioner,PractitionerRole): Common patterns = Participant
Requirements

Need to know for audit/traceback requirements and possibly for authorization.

Summary true
Comments

Usually only for the request but can be used in a response.

MessageHeader.author
Element Id MessageHeader.author
Definition

The logical author of the message - the person or device that decided the described event should happen. When there is more than one candidate, pick the most proximal to the MessageHeader. Can provide other authors in extensions.

Cardinality 0..1
Type Reference ( Practitioner | PractitionerRole )
Patterns Reference(Practitioner,PractitionerRole): Common patterns = Participant
Requirements

Need to know for audit/traceback requirements and possibly for authorization.

Summary true
Comments

Usually only for the request but can be used in a response.

MessageHeader.source
Element Id MessageHeader.source
Definition

The source application from which this message originated.

Cardinality 1..1
Requirements

Allows replies, supports audit.

Summary true
MessageHeader.source.name
Element Id MessageHeader.source.name
Definition

Human-readable name for the source system.

Cardinality 0..1
Type string
Requirements

May be used to support audit.

Summary true
MessageHeader.source.software
Element Id MessageHeader.source.software
Definition

May include configuration or other information useful in debugging.

Cardinality 0..1
Type string
Requirements

Supports audit and possibly interface engine behavior.

Summary true
MessageHeader.source.version
Element Id MessageHeader.source.version
Definition

Can convey versions of multiple systems in situations where a message passes through multiple hands.

Note This is a business versionId, not a resource version id (see discussion )
Cardinality 0..1
Type string
Requirements

Supports audit and possibly interface engine behavior.

Summary true
MessageHeader.source.contact
Element Id MessageHeader.source.contact
Definition

An e-mail, phone, website or other contact point to use to resolve issues with message communications.

Cardinality 0..1
Type ContactPoint
Requirements

Allows escalation of technical issues.

Summary true
MessageHeader.source.endpoint
Element Id MessageHeader.source.endpoint
Definition

Identifies the routing target to send acknowledgements to.

Cardinality 1..1
Type url
Requirements

Identifies where to send responses, may influence security permissions.

Summary true
Comments

The id may be a non-resolvable URI for systems that do not use standard network-based addresses.

MessageHeader.responsible
Element Id MessageHeader.responsible
Definition

The person or organization that accepts overall responsibility for the contents of the message. The implication is that the message event happened under the policies of the responsible party.

Cardinality 0..1
Type Reference ( Practitioner | PractitionerRole | Organization )
Patterns Reference(Practitioner,PractitionerRole,Organization): Common patterns = Participant
Requirements

Need to know for audit/traceback requirements and possibly for authorization.

Summary true
Comments

Usually only for the request but can be used in a response.

MessageHeader.reason
Element Id MessageHeader.reason
Definition

Coded indication of the cause for the event - indicates a reason for the occurrence of the event that is a focus of this message.

Cardinality 0..1
Terminology Binding Example Message Reason Codes ( Example )
Type CodeableConcept
Requirements

Need to be able to track why resources are being changed and report in the audit log/history of the resource. May affect authorization.

Summary true
MessageHeader.response
Element Id MessageHeader.response
Definition

Information about the message that this message is a response to. Only present if this message is a response.

Cardinality 0..1
Summary true
MessageHeader.response.identifier
Element Id MessageHeader.response.identifier
Definition

The MessageHeader.id of the message to which this message is a response.

Note This is a business identifier, not a resource identifier (see discussion )
Cardinality 1..1
Type id
Requirements

Allows receiver to know what message is being responded to.

Summary true
MessageHeader.response.code
Element Id MessageHeader.response.code
Definition

Code that identifies the type of response to the message - whether it was successful or not, and whether it should be resent or not.

Cardinality 1..1
Terminology Binding ResponseType ( Required )
Type code
Requirements

Allows the sender of the acknowledge message to know if the request was successful or if action is needed.

Summary true
Comments

This is a generic response to the request message. Specific data for the response will be found in MessageHeader.focus.

MessageHeader.response.details
Element Id MessageHeader.response.details
Definition

Full details of any issues found in the message.

Cardinality 0..1
Type Reference ( OperationOutcome )
Requirements

Allows the sender of the message to determine what the specific issues are.

Summary true
Comments

This SHALL be contained in the bundle. If any of the issues are errors, the response code SHALL be an error.

MessageHeader.focus
Element Id MessageHeader.focus
Definition

The actual data of the message - a reference to the root/focus class of the event.

Cardinality 0..*
Type Reference ( Any )
Requirements

Every message event is about actual data, a single resource, that is identified in the definition of the event, and perhaps some or all linked resources.

Summary true
Comments

The data is defined where the transaction type is defined. The transaction data is always included in the bundle that is the full message. Only the root resource is specified. The resources it references should be contained in the bundle but are not also listed here. Multiple repetitions are allowed to cater for merges and other situations with multiple focal targets.

MessageHeader.definition
Element Id MessageHeader.definition
Definition

Permanent link to the MessageDefinition for this message.

Cardinality 0..1
Type canonical ( MessageDefinition )
Requirements

Allows sender to define the expected contents of the message.

Summary true