EHDS Logical Information Models
0.4.0 - draft

EHDS Logical Information Models, published by Xt-EHR. This guide is not an authorized publication; it is the continuous build for version 0.4.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/Xt-EHR/xt-ehr-common/ and changes regularly. See the Directory of published versions

## Logical Model: EHDSAlert - Detailed Descriptions

Draft as of 2026-02-23

Definitions for the EHDSAlert logical model.

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

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

0. EHDSAlert
Definition | A statement higlighting a fact about the patient that requires clinical attention to ensure safety and prevent adverse outcomes. Example 1: intolerance to aspirin due to gastrointestinal bleeding. Example 2: intolerance to captopril because of cough (the patient is not allergic but can't tolerate it because of persistent cough) Example 3: the patient has a rare disease that requires special treatment Example 4: Airway Alert / Difficult Intubation Example 5: Diagnoses such as malignant hyperthermia, porphyria, and bleeding disorders; special treatments like anticoagulants or immunosuppressants; implanted devices. Example 6: transplanted organs illustrate other information that has to be taken into account in a healthcare contact. Example 7: participation in a clinical trial that has to be taken into account in a healthcare contact. Base definition for all types defined in FHIR type system.
Short | Alert modelBase for all types and resources
Control | 0..*
Is Modifier | false
Logical Model | Instances of this logical model are not marked to be the target of a Reference
2. EHDSAlert.header
Definition | Basic metadata for this information
Short | Basic metadata for this information
Control | 1..1
Type | Base
4. EHDSAlert.header.subject
Definition | Patient/subject information
Short | Patient/subject information
Control | 1..1
Type | http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSPatient
6. EHDSAlert.header.identifier
Definition | Business identifier for the object, unique within its system. Supporting disambiguation between different contexts (systems/countries).
Short | Business identifier for the object, unique within its system. Supporting disambiguation between different contexts (systems/countries).
Note | This is a business identifier, not a resource identifier (see discussion)
Control | 0..*
Type | Identifier
8. EHDSAlert.header.author[x]
Definition | The author of the alert statement, i.e. the setter of the alert.
Short | The author of the alert statement, i.e. the setter of the alert.
Control | 0..*
Type | Choice of: http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSHealthProfessional, http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSOrganisation, http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSDevice
[x] Note | SeeChoice of Data Typesfor further information about how to use [x]
10. EHDSAlert.header.date
Definition | Date and optionally time of authoring/issuing
Short | Date and optionally time of authoring/issuing
Control | 0..1
Type | dateTime
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
12. EHDSAlert.header.status
Definition | Current status of the alert, indicates whether this alert is active and needs to be displayed to a user, or whether it is no longer needed or was entered in error.
Short | Current status of the alert, indicates whether this alert is active and needs to be displayed to a user, or whether it is no longer needed or was entered in error.
Control | 1..1
Binding | hl7:Flag-status
Type | CodeableConcept
14. EHDSAlert.header.source
Definition | Source of information (e.g. patient, patient's proxy). Used in case the patient has authored the information or the author has submitted patient-stated information.
Short | Source of information (e.g. patient, patient's proxy). Used in case the patient has authored the information or the author has submitted patient-stated information.
Control | 0..1
Type | CodeableConcept
16. EHDSAlert.header.language
Definition | Language in which the resource is written. Language is expressed by the IETF language tag.
Short | Language in which the resource is written. Language is expressed by the IETF language tag.
Control | 0..1
Binding | BCP 47
Type | CodeableConcept
18. EHDSAlert.code
Definition | A coded representation of the alert.
Short | A coded representation of the alert.
Control | 0..1
Binding | SNOMED CT
Type | CodeableConcept
20. EHDSAlert.description
Definition | Narrative representation of the alert.
Short | Narrative representation of the alert.
Control | 0..1
Type | string
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
22. EHDSAlert.priority
Definition | A code that identifies the priority of the alert.
Short | A code that identifies the priority of the alert.
Control | 0..1
Binding | hl7:Flag-priority-code
Type | CodeableConcept
24. EHDSAlert.period
Definition | Time period when alert is active. The period of time from the activation of the alert to inactivation of the alert. If the alert is active, the end of the period should be unspecified.
Short | Time period when alert is active. The period of time from the activation of the alert to inactivation of the alert. If the alert is active, the end of the period should be unspecified.
Control | 0..1
Type | Period
26. EHDSAlert.sourceReference
Definition | A reference to the resource the alert is about.
Short | A reference to the resource the alert is about.
Control | 0..*
Type | Resource

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

0. EHDSAlert
Definition | A statement higlighting a fact about the patient that requires clinical attention to ensure safety and prevent adverse outcomes. Example 1: intolerance to aspirin due to gastrointestinal bleeding. Example 2: intolerance to captopril because of cough (the patient is not allergic but can't tolerate it because of persistent cough) Example 3: the patient has a rare disease that requires special treatment Example 4: Airway Alert / Difficult Intubation Example 5: Diagnoses such as malignant hyperthermia, porphyria, and bleeding disorders; special treatments like anticoagulants or immunosuppressants; implanted devices. Example 6: transplanted organs illustrate other information that has to be taken into account in a healthcare contact. Example 7: participation in a clinical trial that has to be taken into account in a healthcare contact.
Short | Alert model
Logical Model | Instances of this logical model are not marked to be the target of a Reference
2. EHDSAlert.header
4. EHDSAlert.header.author[x]
Definition | The author of the alert statement, i.e. the setter of the alert.
Short | The author of the alert statement, i.e. the setter of the alert.
[x] Note | SeeChoice of Data Typesfor further information about how to use [x]
6. EHDSAlert.header.status
Definition | Current status of the alert, indicates whether this alert is active and needs to be displayed to a user, or whether it is no longer needed or was entered in error.
Short | Current status of the alert, indicates whether this alert is active and needs to be displayed to a user, or whether it is no longer needed or was entered in error.
Binding | hl7:Flag-status
8. EHDSAlert.code
Definition | A coded representation of the alert.
Short | A coded representation of the alert.
Control | 0..1
Binding | SNOMED CT
Type | CodeableConcept
10. EHDSAlert.description
Definition | Narrative representation of the alert.
Short | Narrative representation of the alert.
Control | 0..1
Type | string
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
12. EHDSAlert.priority
Definition | A code that identifies the priority of the alert.
Short | A code that identifies the priority of the alert.
Control | 0..1
Binding | hl7:Flag-priority-code
Type | CodeableConcept
14. EHDSAlert.period
Definition | Time period when alert is active. The period of time from the activation of the alert to inactivation of the alert. If the alert is active, the end of the period should be unspecified.
Short | Time period when alert is active. The period of time from the activation of the alert to inactivation of the alert. If the alert is active, the end of the period should be unspecified.
Control | 0..1
Type | Period
16. EHDSAlert.sourceReference
Definition | A reference to the resource the alert is about.
Short | A reference to the resource the alert is about.
Control | 0..*
Type | Resource

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

0. EHDSAlert
Definition | A statement higlighting a fact about the patient that requires clinical attention to ensure safety and prevent adverse outcomes. Example 1: intolerance to aspirin due to gastrointestinal bleeding. Example 2: intolerance to captopril because of cough (the patient is not allergic but can't tolerate it because of persistent cough) Example 3: the patient has a rare disease that requires special treatment Example 4: Airway Alert / Difficult Intubation Example 5: Diagnoses such as malignant hyperthermia, porphyria, and bleeding disorders; special treatments like anticoagulants or immunosuppressants; implanted devices. Example 6: transplanted organs illustrate other information that has to be taken into account in a healthcare contact. Example 7: participation in a clinical trial that has to be taken into account in a healthcare contact.
Short | Alert model
Control | 0..*
Is Modifier | false
Logical Model | Instances of this logical model are not marked to be the target of a Reference
2. EHDSAlert.header
Definition | Basic metadata for this information
Short | Basic metadata for this information
Control | 1..1
Type | Base
4. EHDSAlert.header.subject
Definition | Patient/subject information
Short | Patient/subject information
Control | 1..1
Type | http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSPatient
6. EHDSAlert.header.identifier
Definition | Business identifier for the object, unique within its system. Supporting disambiguation between different contexts (systems/countries).
Short | Business identifier for the object, unique within its system. Supporting disambiguation between different contexts (systems/countries).
Note | This is a business identifier, not a resource identifier (see discussion)
Control | 0..*
Type | Identifier
8. EHDSAlert.header.author[x]
Definition | The author of the alert statement, i.e. the setter of the alert.
Short | The author of the alert statement, i.e. the setter of the alert.
Control | 0..*
Type | Choice of: http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSHealthProfessional, http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSOrganisation, http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSDevice
[x] Note | SeeChoice of Data Typesfor further information about how to use [x]
10. EHDSAlert.header.date
Definition | Date and optionally time of authoring/issuing
Short | Date and optionally time of authoring/issuing
Control | 0..1
Type | dateTime
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
12. EHDSAlert.header.status
Definition | Current status of the alert, indicates whether this alert is active and needs to be displayed to a user, or whether it is no longer needed or was entered in error.
Short | Current status of the alert, indicates whether this alert is active and needs to be displayed to a user, or whether it is no longer needed or was entered in error.
Control | 1..1
Binding | hl7:Flag-status
Type | CodeableConcept
14. EHDSAlert.header.source
Definition | Source of information (e.g. patient, patient's proxy). Used in case the patient has authored the information or the author has submitted patient-stated information.
Short | Source of information (e.g. patient, patient's proxy). Used in case the patient has authored the information or the author has submitted patient-stated information.
Control | 0..1
Type | CodeableConcept
16. EHDSAlert.header.language
Definition | Language in which the resource is written. Language is expressed by the IETF language tag.
Short | Language in which the resource is written. Language is expressed by the IETF language tag.
Control | 0..1
Binding | BCP 47
Type | CodeableConcept
18. EHDSAlert.code
Definition | A coded representation of the alert.
Short | A coded representation of the alert.
Control | 0..1
Binding | SNOMED CT
Type | CodeableConcept
20. EHDSAlert.description
Definition | Narrative representation of the alert.
Short | Narrative representation of the alert.
Control | 0..1
Type | string
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
22. EHDSAlert.priority
Definition | A code that identifies the priority of the alert.
Short | A code that identifies the priority of the alert.
Control | 0..1
Binding | hl7:Flag-priority-code
Type | CodeableConcept
24. EHDSAlert.period
Definition | Time period when alert is active. The period of time from the activation of the alert to inactivation of the alert. If the alert is active, the end of the period should be unspecified.
Short | Time period when alert is active. The period of time from the activation of the alert to inactivation of the alert. If the alert is active, the end of the period should be unspecified.
Control | 0..1
Type | Period
26. EHDSAlert.sourceReference
Definition | A reference to the resource the alert is about.
Short | A reference to the resource the alert is about.
Control | 0..*
Type | Resource