Making Electronic Data More available for Research and Public Health (MedMorph)
1.0.0 - STU 1

Making Electronic Data More available for Research and Public Health (MedMorph), published by HL7 International - Public Health Work Group. This is not an authorized publication; it is the continuous build for version 1.0.0). This version is based on the current content of https://github.com/HL7/fhir-medmorph/ and changes regularly. See the Directory of published versions

## Resource Profile: MedMorphEncounterStartSubscription - Detailed Descriptions

Active as of 2023-06-08

Definitions for the medmorph-encounter-start-subscription resource profile.

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

Guidance on how to interpret the contents of this table can be found here.

1. Subscription
Definition | Defines a MedMorph Encounter Start Subscription Topic. The subscription resource is used to define a push-based subscription from a server to another system. Once a subscription is registered with the server, the server checks every resource that is created or updated, and if the resource matches the given criteria, it sends a message on the defined "channel" so that another system can take an appropriate action.
2. Subscription.criteria
Definition | Defines a MedMorph Encounter Start Subscription Topic. When using topic-based subscriptions, the primary criteria is always the topic, indicated by its canonical URL.
Pattern Value | http://hl7.org/fhir/us/medmorph/SubscriptionTopic/encounter-start
3. Subscription.criteria.extension:filterCriteria
SliceName | filterCriteria
Control | 0..1
Type | Extension(BackportFilterCriteria) (Extension Type: string)
4. Subscription.criteria.extension:filterCriteria.valueString
Control | 1..1
Type | string
Pattern Value | Encounter?status=in-progress
5. Subscription.channel
Control | 0..?
6. Subscription.channel.type
Fixed Value | rest-hook

Guidance on how to interpret the contents of this table can be found here.

1. Subscription
Definition | Defines a MedMorph Encounter Start Subscription Topic. The subscription resource is used to define a push-based subscription from a server to another system. Once a subscription is registered with the server, the server checks every resource that is created or updated, and if the resource matches the given criteria, it sends a message on the defined "channel" so that another system can take an appropriate action.
Control | 0..*
Summary | false
Alternate Names | WebHook, Hook, Routing Rule
Invariants | Defined on this element dom-2: If the resource is contained in another resource, it SHALL NOT contain nested Resources (: contained.contained.empty()) dom-3: If the resource is contained in another resource, it SHALL be referred to from elsewhere in the resource or SHALL refer to the containing resource (: contained.where(((id.exists() and ('#'+id in (%resource.descendants().reference | %resource.descendants().as(canonical) | %resource.descendants().as(uri) | %resource.descendants().as(url)))) or descendants().where(reference = '#').exists() or descendants().where(as(canonical) = '#').exists() or descendants().where(as(uri) = '#').exists()).not()).trace('unmatched', id).empty()contained.where((('#'+id in (%resource.descendants().reference | %resource.descendants().as(canonical) | %resource.descendants().as(uri) | %resource.descendants().as(url))) or descendants().where(reference = '#').exists() or descendants().where(as(canonical) = '#').exists() or descendants().where(as(canonical) = '#').exists()).not()).trace('unmatched', id).empty()) dom-4: If a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated (: contained.meta.versionId.empty() and contained.meta.lastUpdated.empty()) dom-5: If a resource is contained in another resource, it SHALL NOT have a security label (: contained.meta.security.empty()) dom-6: A resource should have narrative for robust management (: text.`div`.exists())
2. Subscription.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.
Control | 0..1
Type | uri
Is Modifier | true
Summary | true
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 it's narrative along with other profiles, value sets, etc.
Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
3. Subscription.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 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).
Control | 0..*
Type | Extension
Is Modifier | true
Summary | false
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. 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
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.
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())
4. Subscription.status
Definition | The status of the subscription, which marks the server state for managing the subscription.
Control | 1..1
Binding | The codes SHALL be taken from SubscriptionStatus The status of a subscription.
Type | code
Is Modifier | true
Summary | true
Comments | A client can only submit subscription resources in the requested or off state. Only the server can move a subscription from requested to active, and then to error. Either the server or the client can turn a subscription off. This element is labeled as a modifier because the status contains codes that mark the resource as not currently valid.
Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
5. Subscription.reason
Definition | A description of why this subscription is defined.
Control | 1..1
Type | string
Summary | true
Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
6. Subscription.criteria
Definition | Defines a MedMorph Encounter Start Subscription Topic. The rules that the server should use to determine when to generate notifications for this subscription.
Control | 1..1
Type | string
Must Support | true
Summary | true
Comments | The rules are search criteria (without the [base] part). Like Bundle.entry.request.url, it has no leading "/".
Pattern Value | http://hl7.org/fhir/us/medmorph/SubscriptionTopic/encounter-start
Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
7. Subscription.criteria.extension:filterCriteria
SliceName | filterCriteria
Definition | Criteria for topic-based filtering (filter-by).
Control | 0..1 This element is affected by the following invariants: ele-1
Type | Extension(BackportFilterCriteria) (Extension Type: string)
Must Support | true
Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children unless an empty Parameters resource (: hasValue() or (children().count() > id.count()) or $this is Parameters) ext-1: Must have either extensions or value[x], not both (: extension.exists() != value.exists())
8. Subscription.criteria.extension:filterCriteria.extension
Definition | An Extension 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 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.
Control | 0..0*
Type | Extension
Summary | false
Alternate Names | extensions, user content
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.
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 Subscription.criteria.extension.extension. The slices are unordered and Open, and can be differentiated using the following discriminators: value @ url
9. Subscription.criteria.extension:filterCriteria.url
Definition | Source of the definition for the extension code - a logical name or a URL.
Control | 1..1
Type | uri
XML Representation | In the XML format, this property is represented as an attribute.
Summary | false
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/uv/subscriptions-backport/StructureDefinition/backport-filter-criteria
10. Subscription.criteria.extension:filterCriteria.value[x]
Definition | Search-style filters to be applied to narrow the subscription topic stream. Keys can be either search parameters appropriate to the filtering resource or keys defined within the subscription topic. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Control | 10..1
Type | Choice of: string, date, Meta, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, Signature, unsignedInt, time
[x] Note | See Choice of Data Types for further information about how to use [x]
Summary | false
Comments | When multiple filters are applied, evaluates to true if all the conditions are met; otherwise it returns false. (i.e., logical AND).
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 Subscription.criteria.extension.value[x]. The slices are unordered and Closed, and can be differentiated using the following discriminators: type @ $this
11. Subscription.criteria.extension:filterCriteria.value[x]:valueString
SliceName | valueString
Definition | Search-style filters to be applied to narrow the subscription topic stream. Keys can be either search parameters appropriate to the filtering resource or keys defined within the subscription topic. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Control | 10..1
Type | Choice of: string, date, Meta, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, Signature, unsignedInt, time
[x] Note | See Choice of Data Types for further information about how to use [x]
Summary | false
Comments | When multiple filters are applied, evaluates to true if all the conditions are met; otherwise it returns false. (i.e., logical AND).
Pattern Value | Encounter?status=in-progress
Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
12. Subscription.channel
Definition | Details where to send notifications when resources are received that meet the criteria.
Control | 1..1
Type | BackboneElement
Summary | true
Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children unless an empty Parameters resource (: hasValue() or (children().count() > id.count()) or $this is Parameters)
13. Subscription.channel.extension:heartbeatPeriod
SliceName | heartbeatPeriod
Definition | If present, a 'hearbeat' notification (keepalive) is sent via this channel with an the interval period equal to this elements integer value in seconds. If not present, a heartbeat notification is not sent.
Control | 0..1 This element is affected by the following invariants: ele-1
Type | Extension(BackportHeartbeatPeriod) (Extension Type: unsignedInt)
Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children unless an empty Parameters resource (: hasValue() or (children().count() > id.count()) or $this is Parameters) ext-1: Must have either extensions or value[x], not both (: extension.exists() != value.exists())
14. Subscription.channel.extension:timeout
SliceName | timeout
Definition | If present, the maximum amount of time a server will allow before failing a notification attempt.
Control | 0..1 This element is affected by the following invariants: ele-1
Type | Extension(BackportTimeout) (Extension Type: unsignedInt)
Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children unless an empty Parameters resource (: hasValue() or (children().count() > id.count()) or $this is Parameters) ext-1: Must have either extensions or value[x], not both (: extension.exists() != value.exists())
15. Subscription.channel.extension:maxCount
SliceName | maxCount
Definition | If present, the maximum number of triggering resources that will be included in a notification bundle (e.g., a server will not include more than this number of trigger resources in a single notification). Note that this is not a strict limit on the number of entries in a bundle, as dependent resources can be included.
Control | 0..1 This element is affected by the following invariants: ele-1
Type | Extension(BackportMaxCount) (Extension Type: positiveInt)
Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children unless an empty Parameters resource (: hasValue() or (children().count() > id.count()) or $this is Parameters) ext-1: Must have either extensions or value[x], not both (: extension.exists() != value.exists())
16. Subscription.channel.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 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. 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).
Control | 0..*
Type | Extension
Is Modifier | true
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. 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
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.
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())
17. Subscription.channel.type
Definition | The type of channel to send notifications on.
Control | 1..1
Binding | The codes SHALL be taken from SubscriptionChannelType The type of method used to execute a subscription.
Type | code
Summary | true
Fixed Value | rest-hook
Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
18. Subscription.channel.type.extension:customChannelType
SliceName | customChannelType
Definition | The type of channel to send notifications on.
Control | 0..1 This element is affected by the following invariants: ele-1
Type | Extension(BackportChannelType) (Extension Type: Coding)
Must Support | true
Summary | true
Comments | This extension allows for the use of additional channel types that were not defined in the FHIR R4 subscription definition.
Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children unless an empty Parameters resource (: hasValue() or (children().count() > id.count()) or $this is Parameters) ext-1: Must have either extensions or value[x], not both (: extension.exists() != value.exists())
19. Subscription.channel.payload
Definition | The mime type to send the payload in - either application/fhir+xml, or application/fhir+json. If the payload is not present, then there is no payload in the notification, just a notification. The mime type "text/plain" may also be used for Email and SMS subscriptions.
Control | 10..1
Binding | The codes SHALL be taken from Mime Types BCP 13 (RFCs 2045, 2046, 2047, 4288, 4289 and 2049) The mime type of an attachment. Any valid mime type is allowed.
Type | code
Summary | true
Comments | Sending the payload has obvious security implications. The server is responsible for ensuring that the content is appropriately secured.
Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
20. Subscription.channel.payload.extension
Definition | An Extension 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 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.
Control | 10..*
Type | Extension
Summary | false
Alternate Names | extensions, user content
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.
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 Subscription.channel.payload.extension. The slices are unordered and Open, and can be differentiated using the following discriminators: value @ url
21. Subscription.channel.payload.extension:content
SliceName | content
Definition | How much of the resource content to deliver in the notification payload. The choices are an empty payload, only the resource id, or the full resource content.
Control | 1..1 This element is affected by the following invariants: ele-1
Type | Extension(BackportPayloadContent) (Extension Type: code)
Must Support | true
Summary | true
Comments | Sending the payload has obvious security implications. The server is responsible for ensuring that the content is appropriately secured.
Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children unless an empty Parameters resource (: hasValue() or (children().count() > id.count()) or $this is Parameters) ext-1: Must have either extensions or value[x], not both (: extension.exists() != value.exists())

Guidance on how to interpret the contents of this table can be found here.

1. Subscription
Definition | Defines a MedMorph Encounter Start Subscription Topic.
Control | 0..*
Summary | false
Alternate Names | WebHook, Hook, Routing Rule
2. Subscription.id
Definition | The logical id of the resource, as used in the URL for the resource. Once assigned, this value never changes.
Control | 0..1
Type | id
Summary | true
Comments | The only time that a resource does not have an id is when it is being submitted to the server using a create operation.
3. Subscription.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.
Control | 0..1
Type | Meta
Summary | true
Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
4. Subscription.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.
Control | 0..1
Type | uri
Is Modifier | true
Summary | true
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 it's narrative along with other profiles, value sets, etc.
Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
5. Subscription.language
Definition | The base language in which the resource is written.
Control | 0..1
Binding | The codes SHOULD be taken from CommonLanguages IETF language ta
Additional Bindings | Purpose
AllLanguages | Max Binding
Type | code
Summary | false
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).
Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
6. Subscription.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.
Control | 0..1
Type | Narrative
Summary | false
Alternate Names | narrative, html, xhtml, display
Comments | 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.
Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
7. Subscription.contained
Definition | 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.
Control | 0..*
Type | Resource
Summary | false
Alternate Names | inline resources, anonymous resources, contained 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.
Invariants | Defined on this element dom-r4b: Containing new R4B resources within R4 resources may cause interoperability issues if instances are shared with R4 systems (: ($this is Citation or $this is Evidence or $this is EvidenceReport or $this is EvidenceVariable or $this is MedicinalProductDefinition or $this is PackagedProductDefinition or $this is AdministrableProductDefinition or $this is Ingredient or $this is ClinicalUseDefinition or $this is RegulatedAuthorization or $this is SubstanceDefinition or $this is SubscriptionStatus or $this is SubscriptionTopic) implies (%resource is Citation or %resource is Evidence or %resource is EvidenceReport or %resource is EvidenceVariable or %resource is MedicinalProductDefinition or %resource is PackagedProductDefinition or %resource is AdministrableProductDefinition or %resource is Ingredient or %resource is ClinicalUseDefinition or %resource is RegulatedAuthorization or %resource is SubstanceDefinition or %resource is SubscriptionStatus or %resource is SubscriptionTopic))
8. Subscription.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 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.
Control | 0..*
Type | Extension
Summary | false
Alternate Names | extensions, user content
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.
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())
9. Subscription.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 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).
Control | 0..*
Type | Extension
Is Modifier | true
Summary | false
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
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.
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())
10. Subscription.status
Definition | The status of the subscription, which marks the server state for managing the subscription.
Control | 1..1
Binding | The codes SHALL be taken from SubscriptionStatus The status of a subscription
Type | code
Is Modifier | true
Summary | true
Comments | A client can only submit subscription resources in the requested or off state. Only the server can move a subscription from requested to active, and then to error. Either the server or the client can turn a subscription off. This element is labeled as a modifier because the status contains codes that mark the resource as not currently valid.
Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
11. Subscription.contact
Definition | Contact details for a human to contact about the subscription. The primary use of this for system administrator troubleshooting.
Control | 0..*
Type | ContactPoint
Summary | true
Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
12. Subscription.end
Definition | The time for the server to turn the subscription off.
Control | 0..1
Type | instant
Summary | true
Comments | The server is permitted to deviate from this time but should observe it.
Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
13. Subscription.reason
Definition | A description of why this subscription is defined.
Control | 1..1
Type | string
Summary | true
Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
14. Subscription.criteria
Definition | Defines a MedMorph Encounter Start Subscription Topic.
Control | 1..1
Type | string
Must Support | true
Summary | true
Comments | The rules are search criteria (without the [base] part). Like Bundle.entry.request.url, it has no leading "/".
Pattern Value | http://hl7.org/fhir/us/medmorph/SubscriptionTopic/encounter-start
Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
15. Subscription.criteria.id
Definition | unique id for the element within a resource (for internal references)
Control | 0..1
Type | string
XML Representation | In the XML format, this property is represented as an attribute.
Summary | false
16. Subscription.criteria.extension
Definition | An Extension
Control | 0..*
Type | Extension
Summary | false
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 Subscription.criteria.extension. The slices are unordered and Open, and can be differentiated using the following discriminators: value @ url
17. Subscription.criteria.extension:filterCriteria
SliceName | filterCriteria
Definition | Criteria for topic-based filtering (filter-by).
Control | 0..1 This element is affected by the following invariants: ele-1
Type | Extension(BackportFilterCriteria) (Extension Type: string)
Must Support | true
Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children unless an empty Parameters resource (: hasValue() or (children().count() > id.count()) or $this is Parameters) ext-1: Must have either extensions or value[x], not both (: extension.exists() != value.exists())
18. Subscription.criteria.extension:filterCriteria.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 | id
XML Representation | In the XML format, this property is represented as an attribute.
Summary | false
19. Subscription.criteria.extension:filterCriteria.extension
Definition | An Extension
Control | 0..0
Type | Extension
Summary | false
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 Subscription.criteria.extension.extension. The slices are unordered and Open, and can be differentiated using the following discriminators: value @ url
20. Subscription.criteria.extension:filterCriteria.url
Definition | Source of the definition for the extension code - a logical name or a URL.
Control | 1..1
Type | uri
XML Representation | In the XML format, this property is represented as an attribute.
Summary | false
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/uv/subscriptions-backport/StructureDefinition/backport-filter-criteria
21. Subscription.criteria.extension:filterCriteria.value[x]
Definition | Search-style filters to be applied to narrow the subscription topic stream. Keys can be either search parameters appropriate to the filtering resource or keys defined within the subscription topic.
Control | 1..1
Type | string
[x] Note | See Choice of Data Types for further information about how to use [x]
Summary | false
Comments | When multiple filters are applied, evaluates to true if all the conditions are met; otherwise it returns false. (i.e., logical AND).
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 Subscription.criteria.extension.value[x]. The slices are unordered and Closed, and can be differentiated using the following discriminators: type @ $this
22. Subscription.criteria.extension:filterCriteria.value[x]:valueString
SliceName | valueString
Definition | Search-style filters to be applied to narrow the subscription topic stream. Keys can be either search parameters appropriate to the filtering resource or keys defined within the subscription topic.
Control | 1..1
Type | string
[x] Note | See Choice of Data Types for further information about how to use [x]
Summary | false
Comments | When multiple filters are applied, evaluates to true if all the conditions are met; otherwise it returns false. (i.e., logical AND).
Pattern Value | Encounter?status=in-progress
Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
23. Subscription.criteria.value
Definition | The actual value
Control | 0..1
Type | string
XML Representation | In the XML format, this property is represented as an attribute.
Summary | false
Max Length | 1048576
24. Subscription.error
Definition | A record of the last error that occurred when the server processed a notification.
Control | 0..1
Type | string
Summary | true
Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
25. Subscription.channel
Definition | Details where to send notifications when resources are received that meet the criteria.
Control | 1..1
Type | BackboneElement
Summary | true
26. Subscription.channel.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
XML Representation | In the XML format, this property is represented as an attribute.
Summary | false
27. Subscription.channel.extension
Definition | An Extension
Control | 0..*
Type | Extension
Summary | false
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 Subscription.channel.extension. The slices are unordered and Open, and can be differentiated using the following discriminators: value @ url
28. Subscription.channel.extension:heartbeatPeriod
SliceName | heartbeatPeriod
Definition | If present, a 'hearbeat' notification (keepalive) is sent via this channel with an the interval period equal to this elements integer value in seconds. If not present, a heartbeat notification is not sent.
Control | 0..1 This element is affected by the following invariants: ele-1
Type | Extension(BackportHeartbeatPeriod) (Extension Type: unsignedInt)
Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children unless an empty Parameters resource (: hasValue() or (children().count() > id.count()) or $this is Parameters) ext-1: Must have either extensions or value[x], not both (: extension.exists() != value.exists())
29. Subscription.channel.extension:timeout
SliceName | timeout
Definition | If present, the maximum amount of time a server will allow before failing a notification attempt.
Control | 0..1 This element is affected by the following invariants: ele-1
Type | Extension(BackportTimeout) (Extension Type: unsignedInt)
Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children unless an empty Parameters resource (: hasValue() or (children().count() > id.count()) or $this is Parameters) ext-1: Must have either extensions or value[x], not both (: extension.exists() != value.exists())
30. Subscription.channel.extension:maxCount
SliceName | maxCount
Definition | If present, the maximum number of triggering resources that will be included in a notification bundle (e.g., a server will not include more than this number of trigger resources in a single notification). Note that this is not a strict limit on the number of entries in a bundle, as dependent resources can be included.
Control | 0..1 This element is affected by the following invariants: ele-1
Type | Extension(BackportMaxCount) (Extension Type: positiveInt)
Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children unless an empty Parameters resource (: hasValue() or (children().count() > id.count()) or $this is Parameters) ext-1: Must have either extensions or value[x], not both (: extension.exists() != value.exists())
31. Subscription.channel.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 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. 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).
Control | 0..*
Type | Extension
Is Modifier | true
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
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.
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())
32. Subscription.channel.type
Definition | The type of channel to send notifications on.
Control | 1..1
Binding | The codes SHALL be taken from SubscriptionChannelType The type of method used to execute a subscription
Type | code
Summary | true
Fixed Value | rest-hook
33. Subscription.channel.type.id
Definition | unique id for the element within a resource (for internal references)
Control | 0..1
Type | string
XML Representation | In the XML format, this property is represented as an attribute.
Summary | false
34. Subscription.channel.type.extension
Definition | An Extension
Control | 0..*
Type | Extension
Summary | false
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 Subscription.channel.type.extension. The slices are unordered and Open, and can be differentiated using the following discriminators: value @ url
35. Subscription.channel.type.extension:customChannelType
SliceName | customChannelType
Definition | The type of channel to send notifications on.
Control | 0..1 This element is affected by the following invariants: ele-1
Type | Extension(BackportChannelType) (Extension Type: Coding)
Must Support | true
Summary | true
Comments | This extension allows for the use of additional channel types that were not defined in the FHIR R4 subscription definition.
Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children unless an empty Parameters resource (: hasValue() or (children().count() > id.count()) or $this is Parameters) ext-1: Must have either extensions or value[x], not both (: extension.exists() != value.exists())
36. Subscription.channel.type.value
Definition | Primitive value for code
Control | 0..1
Type | code
XML Representation | In the XML format, this property is represented as an attribute.
Summary | false
37. Subscription.channel.endpoint
Definition | The url that describes the actual end-point to send messages to.
Control | 0..1
Type | url
Summary | true
Comments | For rest-hook, and websocket, the end-point must be an http: or https: URL; for email, a mailto: url, for sms, a tel: url, and for message the endpoint can be in any form of url the server understands (usually, http: or mllp:). The URI is allowed to be relative; in which case, it is relative to the server end-point (since there may be more than one, clients should avoid using relative URIs).
Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))
38. Subscription.channel.payload
Definition | The mime type to send the payload in - either application/fhir+xml, or application/fhir+json. If the payload is not present, then there is no payload in the notification, just a notification. The mime type "text/plain" may also be used for Email and SMS subscriptions.
Control | 1..1
Binding | The codes SHALL be taken from Mime Types BCP 13 (RFCs 2045, 2046, 2047, 4288, 4289 and 2049
Type | code
Summary | true
Comments | Sending the payload has obvious security implications. The server is responsible for ensuring that the content is appropriately secured.
39. Subscription.channel.payload.id
Definition | unique id for the element within a resource (for internal references)
Control | 0..1
Type | string
XML Representation | In the XML format, this property is represented as an attribute.
Summary | false
40. Subscription.channel.payload.extension
Definition | An Extension
Control | 1..*
Type | Extension
Summary | false
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 Subscription.channel.payload.extension. The slices are unordered and Open, and can be differentiated using the following discriminators: value @ url
41. Subscription.channel.payload.extension:content
SliceName | content
Definition | How much of the resource content to deliver in the notification payload. The choices are an empty payload, only the resource id, or the full resource content.
Control | 1..1 This element is affected by the following invariants: ele-1
Type | Extension(BackportPayloadContent) (Extension Type: code)
Must Support | true
Summary | true
Comments | Sending the payload has obvious security implications. The server is responsible for ensuring that the content is appropriately secured.
Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children unless an empty Parameters resource (: hasValue() or (children().count() > id.count()) or $this is Parameters) ext-1: Must have either extensions or value[x], not both (: extension.exists() != value.exists())
42. Subscription.channel.payload.value
Definition | Primitive value for code
Control | 0..1
Type | code
XML Representation | In the XML format, this property is represented as an attribute.
Summary | false
43. Subscription.channel.header
Definition | Additional headers / information to send as part of the notification.
Control | 0..*
Type | string
Summary | true
Comments | Exactly what these mean depend on the channel type. They can convey additional information to the recipient and/or meet security requirements; for example, support of multiple headers in the outgoing notifications for rest-hook type subscriptions.
Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children (: hasValue() or (children().count() > id.count()))