HL7 Europe Base and Core FHIR IG, published by HL7 Europe. This guide is not an authorized publication; it is the continuous build for version 0.2.0-ci-build built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/hl7-eu/base/ and changes regularly. See the Directory of published versions
| Official URL: http://hl7.eu/fhir/base/StructureDefinition/flag-eu-core | Version: 0.2.0-ci-build | |||
| Draft as of 2025-10-30 | Computable Name: FlagEuCore | |||
| Copyright/Legal: Copyright HL7 Europe. Licensed under creative commons public domain (CC0 1.0). | ||||
This profile defines the core constraints and extensions for a Flag resource when used in European systems for communicating warnings, alerts, or reminders about important health information.
Usages:
You can also check for usages in the FHIR IG Statistics
Description of Profiles, Differentials, Snapshots and how the different presentations work.
| Name | Flags | Card. | Type | Description & Constraints    Filter:   | 
|---|---|---|---|---|
|   Flag | 0..* | Flag | Key information to flag to healthcare providers | |
|    implicitRules | ?!Σ | 0..1 | uri | A set of rules under which this content was created | 
|    Slices for extension | 0..* | Extension | Extension Slice: Unordered, Open by value:url | |
|     extension:flagDetailExt | 0..* | Reference(Resource) | Resource with details for flag URL: http://hl7.org/fhir/StructureDefinition/flag-detail | |
|     extension:flagPriorityExt | 0..1 | CodeableConcept | An alarm code URL: http://hl7.org/fhir/StructureDefinition/flag-priority Binding: FlagPriorityCodes (example): A code of the alarm. | |
|    modifierExtension | ?! | 0..* | Extension | Extensions that cannot be ignored | 
|    identifier | Σ | 0..* | Identifier | Alert bussiness Identifier | 
|    status | ?!Σ | 1..1 | code | Alert status Binding: FlagStatus (required): Indicates whether this flag is active and needs to be displayed to a user, or whether it is no longer needed or was entered in error. | 
|    code | Σ | 1..1 | CodeableConcept | Coded or textual message to display to user. Binding: FlagCode (example): Detail codes identifying specific flagged issues. | 
|    subject | Σ | 1..1 | Reference(Patient (EU core)) | Who/What is flag about? | 
|    period | Σ | 0..1 | Period | Time period when the alert is active | 
|  Documentation for this format | ||||
| Path | Status | Usage | ValueSet | Version | Source | 
| Flag.status | Base | required | FlagStatus | 📍4.0.1 | FHIR Std. | 
| Flag.code | Base | example | Flag Code | 📍4.0.1 | FHIR Std. | 
| Id | Grade | Path(s) | Description | Expression | 
| dom-2 | error | Flag | If the resource is contained in another resource, it SHALL NOT contain nested Resources | contained.contained.empty() | 
| dom-3 | error | Flag | 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 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 | error | Flag | 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 | error | Flag | If a resource is contained in another resource, it SHALL NOT have a security label | contained.meta.security.empty() | 
| dom-6 | best practice | Flag | A resource should have narrative for robust management | text.`div`.exists() | 
| ele-1 | error | **ALL** elements | All FHIR elements must have a @value or children | hasValue() or (children().count() > id.count()) | 
| ext-1 | error | **ALL** extensions | Must have either extensions or value[x], not both | extension.exists() != value.exists() | 
This structure is derived from Flag
| Name | Flags | Card. | Type | Description & Constraints    Filter:   | 
|---|---|---|---|---|
|   Flag | 0..* | Flag | Key information to flag to healthcare providers | |
|    Slices for extension | 0..* | Extension | Extension Slice: Unordered, Open by value:url | |
|     extension:flagDetailExt | 0..* | Reference(Resource) | Resource with details for flag URL: http://hl7.org/fhir/StructureDefinition/flag-detail | |
|     extension:flagPriorityExt | 0..1 | CodeableConcept | An alarm code URL: http://hl7.org/fhir/StructureDefinition/flag-priority Binding: FlagPriorityCodes (example): A code of the alarm. | |
|    identifier | 0..* | Identifier | Alert bussiness Identifier | |
|    status | 1..1 | code | Alert status | |
|    code | 1..1 | CodeableConcept | Coded or textual message to display to user. | |
|    subject | 1..1 | Reference(Patient (EU core)) | Who/What is flag about? | |
|    period | 0..1 | Period | Time period when the alert is active | |
|  Documentation for this format | ||||
| Name | Flags | Card. | Type | Description & Constraints    Filter:   | ||||
|---|---|---|---|---|---|---|---|---|
|   Flag | 0..* | Flag | Key information to flag to healthcare providers | |||||
|    id | Σ | 0..1 | id | Logical id of this artifact | ||||
|    meta | Σ | 0..1 | Meta | Metadata about the resource | ||||
|    implicitRules | ?!Σ | 0..1 | uri | A set of rules under which this content was created | ||||
|    language | 0..1 | code | Language of the resource content Binding: CommonLanguages (preferred): A human language. 
 | |||||
|    text | 0..1 | Narrative | Text summary of the resource, for human interpretation This profile does not constrain the narrative in regard to content, language, or traceability to data elements | |||||
|    contained | 0..* | Resource | Contained, inline Resources | |||||
|    Slices for extension | 0..* | Extension | Extension Slice: Unordered, Open by value:url | |||||
|     extension:flagDetailExt | 0..* | Reference(Resource) | Resource with details for flag URL: http://hl7.org/fhir/StructureDefinition/flag-detail | |||||
|     extension:flagPriorityExt | 0..1 | CodeableConcept | An alarm code URL: http://hl7.org/fhir/StructureDefinition/flag-priority Binding: FlagPriorityCodes (example): A code of the alarm. | |||||
|    modifierExtension | ?! | 0..* | Extension | Extensions that cannot be ignored | ||||
|    identifier | Σ | 0..* | Identifier | Alert bussiness Identifier | ||||
|    status | ?!Σ | 1..1 | code | Alert status Binding: FlagStatus (required): Indicates whether this flag is active and needs to be displayed to a user, or whether it is no longer needed or was entered in error. | ||||
|    category | Σ | 0..* | CodeableConcept | Clinical, administrative, etc. Binding: FlagCategory (example): A general category for flags for filtering/display purposes. | ||||
|    code | Σ | 1..1 | CodeableConcept | Coded or textual message to display to user. Binding: FlagCode (example): Detail codes identifying specific flagged issues. | ||||
|    subject | Σ | 1..1 | Reference(Patient (EU core)) | Who/What is flag about? | ||||
|    period | Σ | 0..1 | Period | Time period when the alert is active | ||||
|    encounter | Σ | 0..1 | Reference(Encounter) | Alert relevant during encounter | ||||
|    author | Σ | 0..1 | Reference(Device | Organization | Patient | Practitioner | PractitionerRole) | Flag creator | ||||
|  Documentation for this format | ||||||||
| Path | Status | Usage | ValueSet | Version | Source | 
| Flag.language | Base | preferred | Common Languages | 📍4.0.1 | FHIR Std. | 
| Flag.status | Base | required | FlagStatus | 📍4.0.1 | FHIR Std. | 
| Flag.category | Base | example | Flag Category | 📍4.0.1 | FHIR Std. | 
| Flag.code | Base | example | Flag Code | 📍4.0.1 | FHIR Std. | 
| Id | Grade | Path(s) | Description | Expression | 
| dom-2 | error | Flag | If the resource is contained in another resource, it SHALL NOT contain nested Resources | contained.contained.empty() | 
| dom-3 | error | Flag | 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 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 | error | Flag | 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 | error | Flag | If a resource is contained in another resource, it SHALL NOT have a security label | contained.meta.security.empty() | 
| dom-6 | best practice | Flag | A resource should have narrative for robust management | text.`div`.exists() | 
| ele-1 | error | **ALL** elements | All FHIR elements must have a @value or children | hasValue() or (children().count() > id.count()) | 
| ext-1 | error | **ALL** extensions | Must have either extensions or value[x], not both | extension.exists() != value.exists() | 
This structure is derived from Flag
Key Elements View
| Name | Flags | Card. | Type | Description & Constraints    Filter:   | 
|---|---|---|---|---|
|   Flag | 0..* | Flag | Key information to flag to healthcare providers | |
|    implicitRules | ?!Σ | 0..1 | uri | A set of rules under which this content was created | 
|    Slices for extension | 0..* | Extension | Extension Slice: Unordered, Open by value:url | |
|     extension:flagDetailExt | 0..* | Reference(Resource) | Resource with details for flag URL: http://hl7.org/fhir/StructureDefinition/flag-detail | |
|     extension:flagPriorityExt | 0..1 | CodeableConcept | An alarm code URL: http://hl7.org/fhir/StructureDefinition/flag-priority Binding: FlagPriorityCodes (example): A code of the alarm. | |
|    modifierExtension | ?! | 0..* | Extension | Extensions that cannot be ignored | 
|    identifier | Σ | 0..* | Identifier | Alert bussiness Identifier | 
|    status | ?!Σ | 1..1 | code | Alert status Binding: FlagStatus (required): Indicates whether this flag is active and needs to be displayed to a user, or whether it is no longer needed or was entered in error. | 
|    code | Σ | 1..1 | CodeableConcept | Coded or textual message to display to user. Binding: FlagCode (example): Detail codes identifying specific flagged issues. | 
|    subject | Σ | 1..1 | Reference(Patient (EU core)) | Who/What is flag about? | 
|    period | Σ | 0..1 | Period | Time period when the alert is active | 
|  Documentation for this format | ||||
| Path | Status | Usage | ValueSet | Version | Source | 
| Flag.status | Base | required | FlagStatus | 📍4.0.1 | FHIR Std. | 
| Flag.code | Base | example | Flag Code | 📍4.0.1 | FHIR Std. | 
| Id | Grade | Path(s) | Description | Expression | 
| dom-2 | error | Flag | If the resource is contained in another resource, it SHALL NOT contain nested Resources | contained.contained.empty() | 
| dom-3 | error | Flag | 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 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 | error | Flag | 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 | error | Flag | If a resource is contained in another resource, it SHALL NOT have a security label | contained.meta.security.empty() | 
| dom-6 | best practice | Flag | A resource should have narrative for robust management | text.`div`.exists() | 
| ele-1 | error | **ALL** elements | All FHIR elements must have a @value or children | hasValue() or (children().count() > id.count()) | 
| ext-1 | error | **ALL** extensions | Must have either extensions or value[x], not both | extension.exists() != value.exists() | 
Differential View
This structure is derived from Flag
| Name | Flags | Card. | Type | Description & Constraints    Filter:   | 
|---|---|---|---|---|
|   Flag | 0..* | Flag | Key information to flag to healthcare providers | |
|    Slices for extension | 0..* | Extension | Extension Slice: Unordered, Open by value:url | |
|     extension:flagDetailExt | 0..* | Reference(Resource) | Resource with details for flag URL: http://hl7.org/fhir/StructureDefinition/flag-detail | |
|     extension:flagPriorityExt | 0..1 | CodeableConcept | An alarm code URL: http://hl7.org/fhir/StructureDefinition/flag-priority Binding: FlagPriorityCodes (example): A code of the alarm. | |
|    identifier | 0..* | Identifier | Alert bussiness Identifier | |
|    status | 1..1 | code | Alert status | |
|    code | 1..1 | CodeableConcept | Coded or textual message to display to user. | |
|    subject | 1..1 | Reference(Patient (EU core)) | Who/What is flag about? | |
|    period | 0..1 | Period | Time period when the alert is active | |
|  Documentation for this format | ||||
Snapshot View
| Name | Flags | Card. | Type | Description & Constraints    Filter:   | ||||
|---|---|---|---|---|---|---|---|---|
|   Flag | 0..* | Flag | Key information to flag to healthcare providers | |||||
|    id | Σ | 0..1 | id | Logical id of this artifact | ||||
|    meta | Σ | 0..1 | Meta | Metadata about the resource | ||||
|    implicitRules | ?!Σ | 0..1 | uri | A set of rules under which this content was created | ||||
|    language | 0..1 | code | Language of the resource content Binding: CommonLanguages (preferred): A human language. 
 | |||||
|    text | 0..1 | Narrative | Text summary of the resource, for human interpretation This profile does not constrain the narrative in regard to content, language, or traceability to data elements | |||||
|    contained | 0..* | Resource | Contained, inline Resources | |||||
|    Slices for extension | 0..* | Extension | Extension Slice: Unordered, Open by value:url | |||||
|     extension:flagDetailExt | 0..* | Reference(Resource) | Resource with details for flag URL: http://hl7.org/fhir/StructureDefinition/flag-detail | |||||
|     extension:flagPriorityExt | 0..1 | CodeableConcept | An alarm code URL: http://hl7.org/fhir/StructureDefinition/flag-priority Binding: FlagPriorityCodes (example): A code of the alarm. | |||||
|    modifierExtension | ?! | 0..* | Extension | Extensions that cannot be ignored | ||||
|    identifier | Σ | 0..* | Identifier | Alert bussiness Identifier | ||||
|    status | ?!Σ | 1..1 | code | Alert status Binding: FlagStatus (required): Indicates whether this flag is active and needs to be displayed to a user, or whether it is no longer needed or was entered in error. | ||||
|    category | Σ | 0..* | CodeableConcept | Clinical, administrative, etc. Binding: FlagCategory (example): A general category for flags for filtering/display purposes. | ||||
|    code | Σ | 1..1 | CodeableConcept | Coded or textual message to display to user. Binding: FlagCode (example): Detail codes identifying specific flagged issues. | ||||
|    subject | Σ | 1..1 | Reference(Patient (EU core)) | Who/What is flag about? | ||||
|    period | Σ | 0..1 | Period | Time period when the alert is active | ||||
|    encounter | Σ | 0..1 | Reference(Encounter) | Alert relevant during encounter | ||||
|    author | Σ | 0..1 | Reference(Device | Organization | Patient | Practitioner | PractitionerRole) | Flag creator | ||||
|  Documentation for this format | ||||||||
| Path | Status | Usage | ValueSet | Version | Source | 
| Flag.language | Base | preferred | Common Languages | 📍4.0.1 | FHIR Std. | 
| Flag.status | Base | required | FlagStatus | 📍4.0.1 | FHIR Std. | 
| Flag.category | Base | example | Flag Category | 📍4.0.1 | FHIR Std. | 
| Flag.code | Base | example | Flag Code | 📍4.0.1 | FHIR Std. | 
| Id | Grade | Path(s) | Description | Expression | 
| dom-2 | error | Flag | If the resource is contained in another resource, it SHALL NOT contain nested Resources | contained.contained.empty() | 
| dom-3 | error | Flag | 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 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 | error | Flag | 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 | error | Flag | If a resource is contained in another resource, it SHALL NOT have a security label | contained.meta.security.empty() | 
| dom-6 | best practice | Flag | A resource should have narrative for robust management | text.`div`.exists() | 
| ele-1 | error | **ALL** elements | All FHIR elements must have a @value or children | hasValue() or (children().count() > id.count()) | 
| ext-1 | error | **ALL** extensions | Must have either extensions or value[x], not both | extension.exists() != value.exists() | 
This structure is derived from Flag
Other representations of profile: CSV, Excel, Schematron