Order Catalog Implementation Guide
1.0.0 - STU 1

Order Catalog Implementation Guide, published by HL7 International / Orders and Observations. This guide is not an authorized publication; it is the continuous build for version 1.0.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7/fhir-order-catalog/ and changes regularly. See the Directory of published versions

## Resource Profile: CatalogMessageDefinition - Detailed Descriptions

Page standards status: Trial-use | Maturity Level: 2

Definitions for the CatalogMessageDefinition resource profile.

- Key Elements Table
- Differential Elements Table
- Snapshot Elements Table

Guidance on how to interpret the contents of this table can be foundhere

0. MessageDefinition
Definition | Defines the characteristics of a message that can be shared between systems, including the type of event that initiates the message, the content to be transmitted and what response(s), if any, are permitted.
Short | A resource that defines a type of message that can be exchanged between systems
Comments | This would be a MIF-level artifact.
Control | 0..*
Is Modifier | false
Must Support | false
Summary | false
Invariants | cnl-0: Name should be usable as an identifier for the module by machine processing applications such as code generation (name.exists() implies name.matches('^[A-Z]([A-Za-z0-9_]){1,254}$'))
2. MessageDefinition.implicitRules
Definition | A reference to a set of rules that were followed when the resource was constructed, and which must be understood when processing the content. Often, this is a reference to an implementation guide that defines the special rules along with other profiles etc.
Short | A set of rules under which this content was created
Comments | Asserting this rule set restricts the content to be only understood by a limited set of trading partners. This inherently limits the usefulness of the data in the long term. However, the existing health eco-system is highly fractured, and not yet ready to define, collect, and exchange data in a generally computable sense. Wherever possible, implementers and/or specification writers should avoid using this element. Often, when used, the URL is a reference to an implementation guide that defines these special rules as part of its narrative along with other profiles, value sets, etc.
Control | 0..1
Type | uri
Is Modifier | true because This element is labeled as a modifier because the implicit rules may provide additional knowledge about the resource that modifies its meaning or interpretation
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Must Support | false
Summary | true
Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
4. MessageDefinition.contained
Definition | These resources do not have an independent existence apart from the resource that contains them - they cannot be identified independently, nor can they have their own independent transaction scope. This is allowed to be a Parameters resource if and only if it is referenced by a resource that provides context/meaning.
Short | Contained, inline Resources
Comments | This should never be done when the content can be identified properly, as once identification is lost, it is extremely difficult (and context dependent) to restore it again. Contained resources may have profiles and tags in their meta elements, but SHALL NOT have security labels.
Control | 0..* This element is affected by the following invariants: dom-2, dom-4, dom-3, dom-5
Type | Resource
Is Modifier | false
Must Support | false
Summary | false
Alternate Names | inline resources, anonymous resources, contained resources
6. MessageDefinition.modifierExtension
Definition | May be used to represent additional information that is not part of the basic definition of the resource and that modifies the understanding of the element that contains it and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions. Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).
Short | Extensions that cannot be ignored
Comments | There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control | 0..*
Type | Extension
Is Modifier | true because Modifier extensions are expected to modify the meaning or interpretation of the resource that contains them
Must Support | false
Summary | true
Requirements | Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.
Alternate Names | extensions, user content
Invariants | 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())
8. MessageDefinition.status
Definition | The status of this message definition. Enables tracking the life-cycle of the content.
Short | draft | active | retired | unknown
Comments | Allows filtering of message definitions that are appropriate for use versus not. See guidance around (not) making local changes to elements here. Allows filtering of message definitions that are appropriate for use versus not. See guidance around (not) making local changes to elements here.
Control | 1..1
Binding | The codes SHALL be taken from PublicationStatus http://hl7.org/fhir/ValueSet/publication-status|5.0.0 (required to `http://hl7.org/fhir/ValueSet/publication-status|5.0.0` ) The lifecycle status of an artifact.
Type | code
Is Modifier | true because This is labeled as "Is Modifier" because applications should not use a retired {{title}} without due consideration
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Must Support | false
Summary | true
Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
10. MessageDefinition.date
Definition | The date (and optionally time) when the message definition was last significantly changed. The date must change when the business version changes and it must change if the status code changes. In addition, it should change when the substantive content of the message definition changes.
Short | Date last changed
Comments | The date is often not tracked until the resource is published, but may be present on draft content. Note that this is not the same as the resource last-modified-date, since the resource may be a secondary representation of the message definition. Additional specific dates may be added as extensions or be found by consulting Provenances associated with past versions of the resource. See guidance around (not) making local changes to elements here. The date is often not tracked until the resource is published, but may be present on draft content. Note that this is not the same as the resource last-modified-date, since the resource may be a secondary representation of the message definition. Additional specific dates may be added as extensions or be found by consulting Provenances associated with past versions of the resource. See guidance around (not) making local changes to elements here.
Control | 1..1
Type | dateTime
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Must Support | false
Summary | true
Alternate Names | Revision Date
Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
12. MessageDefinition.event[x]
Definition | Event code for messages conveying order-catalog content Event code or link to the EventDefinition.
Short | Event codeEvent code or link to the EventDefinition
Control | 1..1
Binding | Unless not suitable, these codes SHALL be taken from For example codes, see Message event codes for exchanging order catalog content http://hl7.org/fhir/ValueSet/message-events|5.0.0 (extensible to `http://hl7.org/fhir/uv/order-catalog/ValueSet/catalog-message-events-vs` ) message events for messages conveying order-catalog content One of the message events defined as part of this version of FHIR.
Type | Coding, uri
[x] Note | SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier | false
Must Support | true
Summary | true
Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
14. MessageDefinition.category
Definition | The impact of the content of the message.
Short | consequence | currency | notification
Control | 0..1
Binding | The codes SHALL be taken from MessageSignificanceCategory http://hl7.org/fhir/ValueSet/message-significance-category|5.0.0 (required to `http://hl7.org/fhir/ValueSet/message-significance-category|5.0.0` ) The impact of the content of a message.
Type | code
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Must Support | false
Summary | true
Pattern Value | `consequence`
Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
16. MessageDefinition.responseRequired
Definition | Declare at a message definition level whether a response is required or only upon error or success, or never.
Short | always | on-error | never | on-success
Comments | This enables the capability currently available through MSH-16 (Application Level acknowledgement) in HL7 Version 2 to declare at a message instance level whether a response is required or only upon error or success, or never.
Control | 10..1
Binding | The codes SHALL be taken from MessageheaderResponseRequest http://hl7.org/fhir/ValueSet/messageheader-response-request|5.0.0 (required to `http://hl7.org/fhir/ValueSet/messageheader-response-request|5.0.0` ) This enables the capability currently available through MSH-16 (Application Level acknowledgement) in HL7 Version 2 to declare at a message definition level whether a response is required or only upon error or success, or never.
Type | code
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Must Support | true
Summary | false
Example | General: always
Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))

Guidance on how to interpret the contents of this table can be foundhere

0. MessageDefinition
2. MessageDefinition.event[x]
Definition | Event code for messages conveying order-catalog content
Short | Event code
Binding | Unless not suitable, these codes SHALL be taken from Message event codes for exchanging order catalog content (extensible to `http://hl7.org/fhir/uv/order-catalog/ValueSet/catalog-message-events-vs` ) message events for messages conveying order-catalog content
Type | Coding, uri
[x] Note | SeeChoice of Data Typesfor further information about how to use [x]
Must Support | true
4. MessageDefinition.category
Pattern Value | `consequence`
6. MessageDefinition.responseRequired
Control | 1..?
Must Support | true

Guidance on how to interpret the contents of this table can be foundhere

0. MessageDefinition
Definition | Defines the characteristics of a message that can be shared between systems, including the type of event that initiates the message, the content to be transmitted and what response(s), if any, are permitted.
Short | A resource that defines a type of message that can be exchanged between systems
Comments | This would be a MIF-level artifact.
Control | 0..*
Is Modifier | false
Must Support | false
Summary | false
Invariants | cnl-0: Name should be usable as an identifier for the module by machine processing applications such as code generation (`name.exists() implies name.matches('^[A-Z]([A-Za-z0-9_]){1,254}$')`)
2. MessageDefinition.id
Definition | The logical id of the resource, as used in the URL for the resource. Once assigned, this value never changes.
Short | Logical id of this artifact
Comments | Within the context of the FHIR RESTful interactions, the resource has an id except for cases like the create and conditional update. Otherwise, the use of the resouce id depends on the given use case.
Control | 0..1
Type | id
Is Modifier | false
Must Support | false
Summary | true
4. MessageDefinition.meta
Definition | The metadata about the resource. This is content that is maintained by the infrastructure. Changes to the content might not always be associated with version changes to the resource.
Short | Metadata about the resource
Control | 0..1
Type | Meta
Is Modifier | false
Must Support | false
Summary | true
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
6. MessageDefinition.implicitRules
Definition | A reference to a set of rules that were followed when the resource was constructed, and which must be understood when processing the content. Often, this is a reference to an implementation guide that defines the special rules along with other profiles etc.
Short | A set of rules under which this content was created
Comments | Asserting this rule set restricts the content to be only understood by a limited set of trading partners. This inherently limits the usefulness of the data in the long term. However, the existing health eco-system is highly fractured, and not yet ready to define, collect, and exchange data in a generally computable sense. Wherever possible, implementers and/or specification writers should avoid using this element. Often, when used, the URL is a reference to an implementation guide that defines these special rules as part of its narrative along with other profiles, value sets, etc.
Control | 0..1
Type | uri
Is Modifier | true because This element is labeled as a modifier because the implicit rules may provide additional knowledge about the resource that modifies its meaning or interpretation
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Must Support | false
Summary | true
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
8. MessageDefinition.language
Definition | The base language in which the resource is written.
Short | Language of the resource content
Comments | Language is provided to support indexing and accessibility (typically, services such as text to speech use the language tag). The html language tag in the narrative applies to the narrative. The language tag on the resource may be used to specify the language of other presentations generated from the data in the resource. Not all the content has to be in the base language. The Resource.language should not be assumed to apply to the narrative automatically. If a language is specified, it should it also be specified on the div element in the html (see rules in HTML5 for information about the relationship between xml:lang and the html lang attribute).
Control | 0..1
Binding | The codes SHALL be taken from AllLanguages (required to `http://hl7.org/fhir/ValueSet/all-languages|5.0.0` ) IETF language tag for a human language
Type | code
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Must Support | false
Summary | false
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
10. MessageDefinition.text
Definition | A human-readable narrative that contains a summary of the resource and can be used to represent the content of the resource to a human. The narrative need not encode all the structured data, but is required to contain sufficient detail to make it "clinically safe" for a human to just read the narrative. Resource definitions may define what content should be represented in the narrative to ensure clinical safety.
Short | Text summary of the resource, for human interpretation
Comments | Contained resources do not have a narrative. Resources that are not contained SHOULD have a narrative. In some cases, a resource may only have text with little or no additional discrete data (as long as all minOccurs=1 elements are satisfied). This may be necessary for data from legacy systems where information is captured as a "text blob" or where text is additionally entered raw or narrated and encoded information is added later.
Control | 0..1 This element is affected by the following invariants: dom-6
Type | Narrative
Is Modifier | false
Must Support | false
Summary | false
Alternate Names | narrative, html, xhtml, display
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
12. MessageDefinition.contained
Definition | These resources do not have an independent existence apart from the resource that contains them - they cannot be identified independently, nor can they have their own independent transaction scope. This is allowed to be a Parameters resource if and only if it is referenced by a resource that provides context/meaning.
Short | Contained, inline Resources
Comments | This should never be done when the content can be identified properly, as once identification is lost, it is extremely difficult (and context dependent) to restore it again. Contained resources may have profiles and tags in their meta elements, but SHALL NOT have security labels.
Control | 0..* This element is affected by the following invariants: dom-2, dom-4, dom-3, dom-5
Type | Resource
Is Modifier | false
Must Support | false
Summary | false
Alternate Names | inline resources, anonymous resources, contained resources
14. MessageDefinition.extension
Definition | May be used to represent additional information that is not part of the basic definition of the resource. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short | Additional content defined by implementations
Comments | There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control | 0..*
Type | Extension
Is Modifier | false
Must Support | false
Summary | false
Alternate Names | extensions, user content
Invariants | 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()`)
16. MessageDefinition.modifierExtension
Definition | May be used to represent additional information that is not part of the basic definition of the resource and that modifies the understanding of the element that contains it and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions. Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).
Short | Extensions that cannot be ignored
Comments | There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control | 0..*
Type | Extension
Is Modifier | true because Modifier extensions are expected to modify the meaning or interpretation of the resource that contains them
Must Support | false
Summary | true
Requirements | Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.
Alternate Names | extensions, user content
Invariants | 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()`)
18. MessageDefinition.url
Definition | The business identifier that is used to reference the MessageDefinition and is expected to be consistent from server to server.
Short | The cannonical URL for a given MessageDefinition
Comments | Can be a urn:uuid: or a urn:oid: but real http: addresses are preferred. Multiple instances may share the same URL if they have a distinct version. The determination of when to create a new version of a resource (same url, new version) vs. defining a new artifact is up to the author. Considerations for making this decision are found in Technical and Business Versions. In some cases, the resource can no longer be found at the stated url, but the url itself cannot change. Implementations can use the meta.source element to indicate where the current master source of the resource can be found.
Control | 0..1
Type | uri
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Must Support | false
Summary | true
Requirements | Allows the message definition to be referenced by a single globally unique identifier.
Invariants | cnl-1: URL should not contain | or # - these characters make processing canonical references problematic (`exists() implies matches('^[^|# ]+$')`) ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
20. MessageDefinition.identifier
Definition | A formal identifier that is used to identify this message definition when it is represented in other formats, or referenced in a specification, model, design or an instance.
Short | Business Identifier for a given MessageDefinition
Comments | Typically, this is used for identifiers that can go in an HL7 V3 II (instance identifier) data type, and can then identify this message definition outside of FHIR, where it is not possible to use the logical URI.
Note | This is a business identifier, not a resource identifier (see discussion)
Control | 0..*
Type | Identifier
Is Modifier | false
Must Support | false
Summary | true
Requirements | Allows externally provided and/or usable business identifiers to be easily associated with the module.
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
22. MessageDefinition.version
Definition | The identifier that is used to identify this version of the message definition when it is referenced in a specification, model, design or instance. This is an arbitrary value managed by the message definition author and is not expected to be globally unique. For example, it might be a timestamp (e.g. yyyymmdd) if a managed version is not available. There is also no expectation that versions can be placed in a lexicographical sequence.
Short | Business version of the message definition
Comments | There may be different message definition instances that have the same identifier but different versions. The version can be appended to the url in a reference to allow a reference to a particular business version of the message definition with the format [url]|[version]. The version SHOULD NOT contain a '#' - see Business Version.
Note | This is a business version Id, not a resource version Id (see discussion)
Control | 0..1
Type | string
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Must Support | false
Summary | true
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
24. MessageDefinition.versionAlgorithm[x]
Definition | Indicates the mechanism used to compare versions to determine which is more current.
Short | How to compare versions
Comments | If set as a string, this is a FHIRPath expression that has two additional context variables passed in - %version1 and %version2 and will return a negative number if version1 is newer, a positive number if version2 and a 0 if the version ordering can't be successfully be determined.
Control | 0..1
Binding | Unless not suitable, these codes SHALL be taken from VersionAlgorithm (extensible to `http://hl7.org/fhir/ValueSet/version-algorithm|5.0.0` )
Type | Choice of: string, Coding
[x] Note | SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Must Support | false
Summary | true
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
26. MessageDefinition.name
Definition | A natural language name identifying the message definition. This name should be usable as an identifier for the module by machine processing applications such as code generation.
Short | Name for this message definition (computer friendly)
Comments | The name is not expected to be globally unique. The name should be a simple alphanumeric type name to ensure that it is machine-processing friendly.
Control | 0..1 This element is affected by the following invariants: cnl-0
Type | string
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Must Support | false
Summary | true
Requirements | Support human navigation and code generation.
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
28. MessageDefinition.title
Definition | A short, descriptive, user-friendly title for the message definition.
Short | Name for this message definition (human friendly)
Comments | This name does not need to be machine-processing friendly and may contain punctuation, white-space, etc.
Control | 0..1
Type | string
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Must Support | false
Summary | true
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
30. MessageDefinition.replaces
Definition | A MessageDefinition that is superseded by this definition.
Short | Takes the place of
Control | 0..*
Type | canonical(MessageDefinition)
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Must Support | false
Summary | true
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
32. MessageDefinition.status
Definition | The status of this message definition. Enables tracking the life-cycle of the content.
Short | draft | active | retired | unknown
Comments | Allows filtering of message definitions that are appropriate for use versus not. See guidance around (not) making local changes to elements here.
Control | 1..1
Binding | The codes SHALL be taken from PublicationStatus (required to `http://hl7.org/fhir/ValueSet/publication-status|5.0.0` ) The lifecycle status of an artifact.
Type | code
Is Modifier | true because This is labeled as "Is Modifier" because applications should not use a retired {{title}} without due consideration
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Must Support | false
Summary | true
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
34. MessageDefinition.experimental
Definition | A Boolean value to indicate that this message definition is authored for testing purposes (or education/evaluation/marketing) and is not intended to be used for genuine usage.
Short | For testing purposes, not real usage
Comments | Allows filtering of message definitions that are appropriate for use versus not.
Control | 0..1
Type | boolean
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Must Support | false
Summary | true
Requirements | Enables experimental content to be developed following the same lifecycle that would be used for a production-level message definition.
Meaning if Missing | If absent, this resource is treated as though it is not experimental.
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
36. MessageDefinition.date
Definition | The date (and optionally time) when the message definition was last significantly changed. The date must change when the business version changes and it must change if the status code changes. In addition, it should change when the substantive content of the message definition changes.
Short | Date last changed
Comments | The date is often not tracked until the resource is published, but may be present on draft content. Note that this is not the same as the resource last-modified-date, since the resource may be a secondary representation of the message definition. Additional specific dates may be added as extensions or be found by consulting Provenances associated with past versions of the resource. See guidance around (not) making local changes to elements here.
Control | 1..1
Type | dateTime
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Must Support | false
Summary | true
Alternate Names | Revision Date
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
38. MessageDefinition.publisher
Definition | The name of the organization or individual responsible for the release and ongoing maintenance of the message definition.
Short | Name of the publisher/steward (organization or individual)
Comments | Usually an organization but may be an individual. The publisher (or steward) of the message definition is the organization or individual primarily responsible for the maintenance and upkeep of the message definition. This is not necessarily the same individual or organization that developed and initially authored the content. The publisher is the primary point of contact for questions or issues with the message definition. This item SHOULD be populated unless the information is available from context.
Control | 0..1
Type | string
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Must Support | false
Summary | true
Requirements | Helps establish the "authority/credibility" of the message definition. May also allow for contact.
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
40. MessageDefinition.contact
Definition | Contact details to assist a user in finding and communicating with the publisher.
Short | Contact details for the publisher
Comments | May be a web site, an email address, a telephone number, etc. See guidance around (not) making local changes to elements here.
Control | 0..*
Type | ContactDetail
Is Modifier | false
Must Support | false
Summary | true
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
42. MessageDefinition.description
Definition | A free text natural language description of the message definition from a consumer's perspective.
Short | Natural language description of the message definition
Comments | This description can be used to capture details such as comments about misuse, instructions for clinical use and interpretation, literature references, examples from the paper world, etc. It is not a rendering of the message definition as conveyed in the 'text' field of the resource itself. This item SHOULD be populated unless the information is available from context (e.g. the language of the message definition is presumed to be the predominant language in the place the message definition was created).
Control | 0..1
Type | markdown
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Must Support | false
Summary | true
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
44. MessageDefinition.useContext
Definition | The content was developed with a focus and intent of supporting the contexts that are listed. These contexts may be general categories (gender, age, ...) or may be references to specific programs (insurance plans, studies, ...) and may be used to assist with indexing and searching for appropriate message definition instances.
Short | The context that the content is intended to support
Comments | When multiple useContexts are specified, there is no expectation that all or any of the contexts apply.
Control | 0..*
Type | UsageContext
Is Modifier | false
Must Support | false
Summary | true
Requirements | Assist in searching for appropriate content.
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
46. MessageDefinition.jurisdiction
Definition | A legal or geographic region in which the message definition is intended to be used.
Short | Intended jurisdiction for message definition (if applicable)
Comments | It may be possible for the message definition to be used in jurisdictions other than those for which it was originally designed or intended. DEPRECATION NOTE: For consistency, implementations are encouraged to migrate to using the new 'jurisdiction' code in the useContext element. (I.e. useContext.code indicating http://terminology.hl7.org/CodeSystem/usage-context-type#jurisdiction and useContext.valueCodeableConcept indicating the jurisdiction.)
Control | 0..*
Binding | Unless not suitable, these codes SHALL be taken from JurisdictionValueSet (extensible to `http://hl7.org/fhir/ValueSet/jurisdiction|5.0.0` ) Countries and regions within which this artifact is targeted for use.
Type | CodeableConcept
Is Modifier | false
Must Support | false
Summary | true
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
48. MessageDefinition.purpose
Definition | Explanation of why this message definition is needed and why it has been designed as it has.
Short | Why this message definition is defined
Comments | This element does not describe the usage of the message definition. Instead, it provides traceability of ''why'' the resource is either needed or ''why'' it is defined as it is. This may be used to point to source materials or specifications that drove the structure of this message definition.
Control | 0..1
Type | markdown
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Must Support | false
Summary | true
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
50. MessageDefinition.copyright
Definition | A copyright statement relating to the message definition and/or its contents. Copyright statements are generally legal restrictions on the use and publishing of the message definition.
Short | Use and/or publishing restrictions
Control | 0..1
Type | markdown
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Must Support | false
Summary | false
Requirements | Consumers must be able to determine any legal restrictions on the use of the message definition and/or its content.
Alternate Names | License, Restrictions
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
52. MessageDefinition.copyrightLabel
Definition | A short string (<50 characters), suitable for inclusion in a page footer that identifies the copyright holder, effective period, and optionally whether rights are resctricted. (e.g. 'All rights reserved', 'Some rights reserved').
Short | Copyright holder and year(s)
Comments | The (c) symbol should NOT be included in this string. It will be added by software when rendering the notation. Full details about licensing, restrictions, warrantees, etc. goes in the more general 'copyright' element.
Control | 0..1
Type | string
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Must Support | false
Summary | false
Requirements | Defines the content expected to be rendered in all representations of the artifact.
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
54. MessageDefinition.base
Definition | The MessageDefinition that is the basis for the contents of this resource.
Short | Definition this one is based on
Control | 0..1
Type | canonical(MessageDefinition)
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Must Support | false
Summary | true
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
56. MessageDefinition.parent
Definition | Identifies a protocol or workflow that this MessageDefinition represents a step in.
Short | Protocol/workflow this is part of
Comments | It should be possible to use MessageDefinition to describe a message to be used by certain steps in a particular protocol as part of a PlanDefinition or ActivityDefinition.
Control | 0..*
Type | canonical(ActivityDefinition, PlanDefinition)
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Must Support | false
Summary | true
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
58. MessageDefinition.event[x]
Definition | Event code for messages conveying order-catalog content
Short | Event code
Control | 1..1
Binding | Unless not suitable, these codes SHALL be taken from Message event codes for exchanging order catalog content (extensible to `http://hl7.org/fhir/uv/order-catalog/ValueSet/catalog-message-events-vs` ) message events for messages conveying order-catalog content
Type | Coding
[x] Note | SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier | false
Must Support | true
Summary | true
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
60. MessageDefinition.category
Definition | The impact of the content of the message.
Short | consequence | currency | notification
Control | 0..1
Binding | The codes SHALL be taken from MessageSignificanceCategory (required to `http://hl7.org/fhir/ValueSet/message-significance-category|5.0.0` ) The impact of the content of a message.
Type | code
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Must Support | false
Summary | true
Pattern Value | `consequence`
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
62. MessageDefinition.focus
Definition | Identifies the resource (or resources) that are being addressed by the event. For example, the Encounter for an admit message or two Account records for a merge.
Short | Resource(s) that are the subject of the event
Control | 0..*
Type | BackboneElement
Is Modifier | false
Must Support | false
Summary | true
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) md-1: Max must be postive int or * (`max='*' or (max.toInteger() > 0)`)
64. MessageDefinition.focus.id
Definition | Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short | Unique id for inter-element referencing
Control | 0..1 This element is affected by the following invariants: ele-1
Type | string
Is Modifier | false
XML Format | In the XML format, this property is represented as an attribute.
Summary | false
66. MessageDefinition.focus.extension
Definition | May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short | Additional content defined by implementations
Comments | There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control | 0..*
Type | Extension
Is Modifier | false
Summary | false
Alternate Names | extensions, user content
Invariants | 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()`)
68. MessageDefinition.focus.modifierExtension
Definition | May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions. Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).
Short | Extensions that cannot be ignored even if unrecognized
Comments | There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control | 0..*
Type | Extension
Is Modifier | true because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
Summary | true
Requirements | Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.
Alternate Names | extensions, user content, modifiers
Invariants | 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()`)
70. MessageDefinition.focus.code
Definition | The kind of resource that must be the focus for this message.
Short | Type of resource
Comments | Multiple focuses addressing different resources may occasionally occur. E.g. to link or unlink a resource from a particular account or encounter, etc.
Control | 1..1
Binding | The codes SHALL be taken from ResourceType (required to `http://hl7.org/fhir/ValueSet/resource-types|5.0.0` ) One of the resource types defined as part of this version of FHIR.
Type | code
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Must Support | false
Summary | true
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
72. MessageDefinition.focus.profile
Definition | A profile that reflects constraints for the focal resource (and potentially for related resources).
Short | Profile that must be adhered to by focus
Comments | This should be present for most message definitions. However, if the message focus is only a single resource and there is no need to include referenced resources or otherwise enforce the presence of particular elements, it can be omitted.
Control | 0..1
Type | canonical(StructureDefinition)
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Must Support | false
Summary | false
Requirements | This profile allows setting boundaries for what content must appear within the message bundle vs. outside based on the declared aggregation constraints on referenced resources on this and related profiles.
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
74. MessageDefinition.focus.min
Definition | Identifies the minimum number of resources of this type that must be pointed to by a message in order for it to be valid against this MessageDefinition.
Short | Minimum number of focuses of this type
Control | 1..1
Type | unsignedInt
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Must Support | false
Summary | true
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
76. MessageDefinition.focus.max
Definition | Identifies the maximum number of resources of this type that must be pointed to by a message in order for it to be valid against this MessageDefinition.
Short | Maximum number of focuses of this type
Control | 0..1 This element is affected by the following invariants: md-1
Type | string
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Must Support | false
Summary | false
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
78. MessageDefinition.responseRequired
Definition | Declare at a message definition level whether a response is required or only upon error or success, or never.
Short | always | on-error | never | on-success
Comments | This enables the capability currently available through MSH-16 (Application Level acknowledgement) in HL7 Version 2 to declare at a message instance level whether a response is required or only upon error or success, or never.
Control | 1..1
Binding | The codes SHALL be taken from MessageheaderResponseRequest (required to `http://hl7.org/fhir/ValueSet/messageheader-response-request|5.0.0` ) This enables the capability currently available through MSH-16 (Application Level acknowledgement) in HL7 Version 2 to declare at a message definition level whether a response is required or only upon error or success, or never.
Type | code
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Must Support | true
Summary | false
Example | General: always
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
80. MessageDefinition.allowedResponse
Definition | Indicates what types of messages may be sent as an application-level response to this message.
Short | Responses to this message
Comments | This indicates an application level response to "close" a transaction implicit in a particular request message. To define a complete workflow scenario, look to the [[PlanDefinition]] resource which allows the definition of complex orchestrations, conditionality, etc.
Control | 0..*
Type | BackboneElement
Is Modifier | false
Must Support | false
Summary | false
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
82. MessageDefinition.allowedResponse.id
Definition | Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short | Unique id for inter-element referencing
Control | 0..1 This element is affected by the following invariants: ele-1
Type | string
Is Modifier | false
XML Format | In the XML format, this property is represented as an attribute.
Summary | false
84. MessageDefinition.allowedResponse.extension
Definition | May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short | Additional content defined by implementations
Comments | There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control | 0..*
Type | Extension
Is Modifier | false
Summary | false
Alternate Names | extensions, user content
Invariants | 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()`)
86. MessageDefinition.allowedResponse.modifierExtension
Definition | May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions. Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).
Short | Extensions that cannot be ignored even if unrecognized
Comments | There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control | 0..*
Type | Extension
Is Modifier | true because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
Summary | true
Requirements | Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.
Alternate Names | extensions, user content, modifiers
Invariants | 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()`)
88. MessageDefinition.allowedResponse.message
Definition | A reference to the message definition that must be adhered to by this supported response.
Short | Reference to allowed message definition response
Control | 1..1
Type | canonical(MessageDefinition)
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Must Support | false
Summary | false
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
90. MessageDefinition.allowedResponse.situation
Definition | Provides a description of the circumstances in which this response should be used (as opposed to one of the alternative responses).
Short | When should this response be used
Control | 0..1
Type | markdown
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Must Support | false
Summary | false
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
92. MessageDefinition.graph
Definition | Graph is Canonical reference to a GraphDefinition. If a URL is provided, it is the canonical reference to a GraphDefinition that it controls what additional resources are to be added to the Bundle when building the message. The GraphDefinition can also specify profiles that apply to the various resources.
Short | Canonical reference to a GraphDefinition
Control | 0..1
Type | canonical(GraphDefinition)
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Must Support | false
Summary | false
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)