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: EHDSAdvanceDirective - Detailed Descriptions

Draft as of 2026-02-23

Definitions for the EHDSAdvanceDirective 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. EHDSAdvanceDirective
Definition | Healthcare directives concerning life or after life wishes of the patient Base definition for all types defined in FHIR type system.
Short | Advance directive 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. EHDSAdvanceDirective.header
Definition | Basic metadata for this information
Short | Basic metadata for this information
Control | 1..1
Type | Base
4. EHDSAdvanceDirective.header.subject
Definition | Patient/subject information
Short | Patient/subject information
Control | 1..1
Type | http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSPatient
6. EHDSAdvanceDirective.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. EHDSAdvanceDirective.header.author[x]
Definition | Author of the advance directive.
Short | Author of the advance directive.
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. EHDSAdvanceDirective.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. EHDSAdvanceDirective.header.status
Definition | Status of the resource or document
Short | Status of the resource or document
Control | 1..1
Type | CodeableConcept
14. EHDSAdvanceDirective.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. EHDSAdvanceDirective.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. EHDSAdvanceDirective.category
Definition | Categories of directives related to decisions prior and after death, such as life support, resuscitation or organ donation.
Short | Categories of directives related to decisions prior and after death, such as life support, resuscitation or organ donation.
Control | 0..*
Binding | SNOMED CT
Type | CodeableConcept
Requirements | ISO IPS
20. EHDSAdvanceDirective.note
Definition | Textual description of the directive
Short | Textual description of the directive
Control | 0..1
Type | string
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Requirements | eHN PS and HDR Guidelines, MyHealth@EU, ISO IPS
22. EHDSAdvanceDirective.attachment
Definition | Source document, such as a PDF, with the living will and the patient's signature.
Short | Source document, such as a PDF, with the living will and the patient's signature.
Control | 0..1
Type | http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSAttachment
Requirements | eHN HDR Guideline, ISO IPS

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

0. EHDSAdvanceDirective
Definition | Healthcare directives concerning life or after life wishes of the patient
Short | Advance directive model
Logical Model | Instances of this logical model are not marked to be the target of a Reference
2. EHDSAdvanceDirective.header
4. EHDSAdvanceDirective.header.author[x]
Definition | Author of the advance directive.
Short | Author of the advance directive.
[x] Note | SeeChoice of Data Typesfor further information about how to use [x]
6. EHDSAdvanceDirective.category
Definition | Categories of directives related to decisions prior and after death, such as life support, resuscitation or organ donation.
Short | Categories of directives related to decisions prior and after death, such as life support, resuscitation or organ donation.
Control | 0..*
Binding | SNOMED CT
Type | CodeableConcept
Requirements | ISO IPS
8. EHDSAdvanceDirective.note
Definition | Textual description of the directive
Short | Textual description of the directive
Control | 0..1
Type | string
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Requirements | eHN PS and HDR Guidelines, MyHealth@EU, ISO IPS
10. EHDSAdvanceDirective.attachment
Definition | Source document, such as a PDF, with the living will and the patient's signature.
Short | Source document, such as a PDF, with the living will and the patient's signature.
Control | 0..1
Type | http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSAttachment
Requirements | eHN HDR Guideline, ISO IPS

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

0. EHDSAdvanceDirective
Definition | Healthcare directives concerning life or after life wishes of the patient
Short | Advance directive model
Control | 0..*
Is Modifier | false
Logical Model | Instances of this logical model are not marked to be the target of a Reference
2. EHDSAdvanceDirective.header
Definition | Basic metadata for this information
Short | Basic metadata for this information
Control | 1..1
Type | Base
4. EHDSAdvanceDirective.header.subject
Definition | Patient/subject information
Short | Patient/subject information
Control | 1..1
Type | http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSPatient
6. EHDSAdvanceDirective.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. EHDSAdvanceDirective.header.author[x]
Definition | Author of the advance directive.
Short | Author of the advance directive.
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. EHDSAdvanceDirective.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. EHDSAdvanceDirective.header.status
Definition | Status of the resource or document
Short | Status of the resource or document
Control | 1..1
Type | CodeableConcept
14. EHDSAdvanceDirective.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. EHDSAdvanceDirective.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. EHDSAdvanceDirective.category
Definition | Categories of directives related to decisions prior and after death, such as life support, resuscitation or organ donation.
Short | Categories of directives related to decisions prior and after death, such as life support, resuscitation or organ donation.
Control | 0..*
Binding | SNOMED CT
Type | CodeableConcept
Requirements | ISO IPS
20. EHDSAdvanceDirective.note
Definition | Textual description of the directive
Short | Textual description of the directive
Control | 0..1
Type | string
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Requirements | eHN PS and HDR Guidelines, MyHealth@EU, ISO IPS
22. EHDSAdvanceDirective.attachment
Definition | Source document, such as a PDF, with the living will and the patient's signature.
Short | Source document, such as a PDF, with the living will and the patient's signature.
Control | 0..1
Type | http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSAttachment
Requirements | eHN HDR Guideline, ISO IPS