EventDefinition

The EventDefinition resource provides a reusable description of when a particular event can occur.

Schema

Elements

Name	Required	Type	Description
url		uri	Canonical identifier for this event definition, represented as a URI (globally unique) Details An absolute URI that is used to identify this event definition when it is referenced in a specification, model, design or an instance; also called its canonical identifier. This SHOULD be globally unique and SHOULD be a literal address at which at which an authoritative instance of this event definition is (or will be) published. This URL can be the target of a canonical reference. It SHALL remain the same when the event definition is stored on different servers. 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](resource.html#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](resource.html#meta) element to indicate where the current master source of the resource can be found.
identifier		Identifier[]	Additional identifier for the event definition Details A formal identifier that is used to identify this event definition when it is represented in other formats, or referenced in a specification, model, design or an instance. Typically, this is used for identifiers that can go in an HL7 V3 II (instance identifier) data type, and can then identify this event definition outside of FHIR, where it is not possible to use the logical URI.
version		string	Business version of the event definition Details The identifier that is used to identify this version of the event definition when it is referenced in a specification, model, design or instance. This is an arbitrary value managed by the event 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. There may be different event 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 event definition with the format [url]|[version].
name		string	Name for this event definition (computer friendly) Details A natural language name identifying the event definition. This name should be usable as an identifier for the module by machine processing applications such as code generation. 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.
title		string	Name for this event definition (human friendly) Details A short, descriptive, user-friendly title for the event definition. This name does not need to be machine-processing friendly and may contain punctuation, white-space, etc.
subtitle		string	Subordinate title of the event definition Details An explanatory or alternate title for the event definition giving additional information about its content.
status	✓	code	draft | active | retired | unknown Details The status of this event definition. Enables tracking the life-cycle of the content. Allows filtering of event definitions that are appropriate for use versus not.
experimental		boolean	For testing purposes, not real usage Details A Boolean value to indicate that this event definition is authored for testing purposes (or education/evaluation/marketing) and is not intended to be used for genuine usage. Allows filtering of event definitions that are appropriate for use versus not.
subject[x]		CodeableConcept, Reference<Group>	Type of individual the event definition is focused on Details A code or group definition that describes the intended subject of the event definition.
date		dateTime	Date last changed Details The date (and optionally time) when the event definition was published. 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 event definition changes. Note that this is not the same as the resource last-modified-date, since the resource may be a secondary representation of the event definition. Additional specific dates may be added as extensions or be found by consulting Provenances associated with past versions of the resource.
publisher		string	Name of the publisher (organization or individual) Details The name of the organization or individual that published the event definition. Usually an organization but may be an individual. The publisher (or steward) of the event definition is the organization or individual primarily responsible for the maintenance and upkeep of the event 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 event definition. This item SHOULD be populated unless the information is available from context.
contact		ContactDetail[]	Contact details for the publisher Details Contact details to assist a user in finding and communicating with the publisher. May be a web site, an email address, a telephone number, etc.
description		markdown	Natural language description of the event definition Details A free text natural language description of the event definition from a consumer's perspective. This description can be used to capture details such as why the event definition was built, comments about misuse, instructions for clinical use and interpretation, literature references, examples from the paper world, etc. It is not a rendering of the event 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 event definition is presumed to be the predominant language in the place the event definition was created).
useContext		UsageContext[]	The context that the content is intended to support Details 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 event definition instances. When multiple useContexts are specified, there is no expectation that all or any of the contexts apply.
jurisdiction		CodeableConcept[]	Intended jurisdiction for event definition (if applicable) Details A legal or geographic region in which the event definition is intended to be used. It may be possible for the event definition to be used in jurisdictions other than those for which it was originally designed or intended.
purpose		markdown	Why this event definition is defined Details Explanation of why this event definition is needed and why it has been designed as it has. This element does not describe the usage of the event 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 event definition.
usage		string	Describes the clinical usage of the event definition Details A detailed description of how the event definition is used from a clinical perspective.
copyright		markdown	Use and/or publishing restrictions Details A copyright statement relating to the event definition and/or its contents. Copyright statements are generally legal restrictions on the use and publishing of the event definition.
approvalDate		date	When the event definition was approved by publisher Details The date on which the resource content was approved by the publisher. Approval happens once when the content is officially approved for usage. The 'date' element may be more recent than the approval date because of minor changes or editorial corrections.
lastReviewDate		date	When the event definition was last reviewed Details The date on which the resource content was last reviewed. Review happens periodically after approval but does not change the original approval date. If specified, this date follows the original approval date.
effectivePeriod		Period	When the event definition is expected to be used Details The period during which the event definition content was or is planned to be in active use. The effective period for a event definition determines when the content is applicable for usage and is independent of publication and review dates. For example, a measure intended to be used for the year 2016 might be published in 2015.
topic		CodeableConcept[]	E.g. Education, Treatment, Assessment, etc. Details Descriptive topics related to the module. Topics provide a high-level categorization of the module that can be useful for filtering and searching.
author		ContactDetail[]	Who authored the content Details An individiual or organization primarily involved in the creation and maintenance of the content.
editor		ContactDetail[]	Who edited the content Details An individual or organization primarily responsible for internal coherence of the content.
reviewer		ContactDetail[]	Who reviewed the content Details An individual or organization primarily responsible for review of some aspect of the content.
endorser		ContactDetail[]	Who endorsed the content Details An individual or organization responsible for officially endorsing the content for use in some setting.
relatedArtifact		RelatedArtifact[]	Additional documentation, citations, etc. Details Related resources such as additional documentation, justification, or bibliographic references. Each related resource is either an attachment, or a reference to another resource, but not both.
trigger	✓	TriggerDefinition[]	"when" the event occurs (multiple = 'or') Details The trigger element defines when the event occurs. If more than one trigger condition is specified, the event fires whenever any one of the trigger conditions is met.

Search Parameters

Name	Type	Description	Expression
composed-of	reference	What resource is being referenced	EventDefinition.relatedArtifact.where(type = 'composed-of').resource
context	token	A use context assigned to the event definition	EventDefinition.useContext.value as CodeableConcept
context-quantity	quantity	A quantity- or range-valued use context assigned to the event definition	EventDefinition.useContext.value as Quantity | EventDefinition.useContext.value as Range
context-type	token	A type of use context assigned to the event definition	EventDefinition.useContext.code
date	date	The event definition publication date	EventDefinition.date
depends-on	reference	What resource is being referenced	EventDefinition.relatedArtifact.where(type = 'depends-on').resource
derived-from	reference	What resource is being referenced	EventDefinition.relatedArtifact.where(type = 'derived-from').resource
description	string	The description of the event definition	EventDefinition.description
effective	date	The time during which the event definition is intended to be in use	EventDefinition.effectivePeriod
identifier	token	External identifier for the event definition	EventDefinition.identifier
jurisdiction	token	Intended jurisdiction for the event definition	EventDefinition.jurisdiction
name	string	Computationally friendly name of the event definition	EventDefinition.name
predecessor	reference	What resource is being referenced	EventDefinition.relatedArtifact.where(type = 'predecessor').resource
publisher	string	Name of the publisher of the event definition	EventDefinition.publisher
status	token	The current status of the event definition	EventDefinition.status
successor	reference	What resource is being referenced	EventDefinition.relatedArtifact.where(type = 'successor').resource
title	string	The human-friendly name of the event definition	EventDefinition.title
topic	token	Topics associated with the module	EventDefinition.topic
url	uri	The uri that identifies the event definition	EventDefinition.url
version	token	The business version of the event definition	EventDefinition.version
context-type-quantity	composite	A use context type and quantity- or range-based value assigned to the event definition	EventDefinition.useContext
context-type-value	composite	A use context type and value assigned to the event definition	EventDefinition.useContext

Inherited Elements

Name	Required	Type	Description
id		string	Logical id of this artifact Details The logical id of the resource, as used in the URL for the resource. Once assigned, this value never changes. The only time that a resource does not have an id is when it is being submitted to the server using a create operation.
meta		Meta	Metadata about the resource Details 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.
implicitRules		uri	A set of rules under which this content was created Details 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. 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 it's narrative along with other profiles, value sets, etc.
language		code	Language of the resource content Details The base language in which the resource is written. 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).
text		Narrative	Text summary of the resource, for human interpretation Details 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. Contained resources do not have 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.
contained		Resource[]	Contained, inline Resources Details These resources do not have an independent existence apart from the resource that contains them - they cannot be identified independently, and nor can they have their own independent transaction scope. 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.
extension		Extension[]	Additional content defined by implementations Details 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 manageable, 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. 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.
modifierExtension		Extension[]	Extensions that cannot be ignored Details 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 manageable, 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). 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.

Usage

This resource is a definition resource from a FHIR workflow perspective - see Workflow, specifically Definition.

The EventDefinition provides a reusable description of an event. The resource supports describing different kinds of events, including named events, periodic events, and data-based events. For each of these, the resource also supports a formal description of the event. For example, a 'monitor-emergency-admissions' event can be a named event, but also provide a formal description of the event as monitoring for encounters that occur in emergency department locations.

Relationships

The EventDefinition resource is intended to be used to provide a reusable description of events for use by other resources that require event definition, such as Subscription. EventDefinition is a definition of an event that could occur, whereas Subscription is asking for notification of events when they occur.