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: EHDSMedicationUseObligations - Detailed Descriptions

Draft as of 2026-02-23

Definitions for the EHDSMedicationUseObligations 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. EHDSMedicationUse
Definition | Statement about a single medication as part of a medication summary. Base definition for all types defined in FHIR type system.
Short | Medication use 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. EHDSMedicationUse.header
Definition | Basic metadata for this information
Short | Basic metadata for this information
Control | 1..1
Type | Base
4. EHDSMedicationUse.header.subject
Definition | Patient/subject information
Short | Patient/subject information
Control | 1..1
Type | http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSPatient
Obligations |
Obligations | Actor
SHALL:able-to-populate | Producer
6. EHDSMedicationUse.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. EHDSMedicationUse.header.author[x]
Definition | The author of the medication use statement
Short | The author of the medication use statement
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. EHDSMedicationUse.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. EHDSMedicationUse.header.status
Definition | Status of the medication use statement (e.g. recorded)
Short | Status of the medication use statement (e.g. recorded)
Control | 1..1
Binding | HL7 MedicationStatement Status Codes
Type | CodeableConcept
Obligations |
Obligations | Actor
SHALL:able-to-populate | Producer
Requirements | eHN PS Guideline, MyHealth@EU, ISO IPS
14. EHDSMedicationUse.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. EHDSMedicationUse.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. EHDSMedicationUse.treatmentStatus
Definition | The current status of taking the medicine (e.g. taking, on-hold, stopped)
Short | The current status of taking the medicine (e.g. taking, on-hold, stopped)
Control | 0..1
Type | CodeableConcept
Requirements | MyHealth@EU
20. EHDSMedicationUse.changeType
Definition | Medication use's change type in a medication summary (e.g. 'added', 'removed', 'altered'). Relevant at the time of discharge or other alteration of the active medications' list.
Short | Medication use's change type in a medication summary (e.g. 'added', 'removed', 'altered'). Relevant at the time of discharge or other alteration of the active medications' list.
Control | 0..*
Type | CodeableConcept
22. EHDSMedicationUse.medication
Definition | Describes the medicinal product.
Short | Describes the medicinal product.
Control | 1..1
Type | http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSMedication
Obligations |
Obligations | Actor
SHALL:able-to-populate | Producer
Requirements | eHN PS Guideline, ISO IPS, MyHealth@EU
24. EHDSMedicationUse.reason[x]
Definition | Reason for the use of the medication (typically diagnosis, or a procedure)
Short | Reason for the use of the medication (typically diagnosis, or a procedure)
Control | 0..*
Type | Choice of: CodeableConcept, string
[x] Note | SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Obligations |
Obligations | Actor
SHOULD:able-to-populate | Producer
Requirements | eHN PS Guideline, ISO IPS, MyHealth@EU
26. EHDSMedicationUse.dosageInstructions
Definition | Details of how medication is/was taken or should be taken
Short | Details of how medication is/was taken or should be taken
Control | 1..1
Type | http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSDosage
Obligations |
Obligations | Actor
SHALL:able-to-populate | Producer
Requirements | eHN PS Guideline, ISO IPS, MyHealth@EU
28. EHDSMedicationUse.periodOfUse
Definition | Period when the patient took, is taking or is expected to take the medication
Short | Period when the patient took, is taking or is expected to take the medication
Control | 0..1
Type | Period
Obligations |
Obligations | Actor
SHALL:able-to-populate | Producer
Requirements | eHN PS Guideline, ISO IPS, MyHealth@EU
30. EHDSMedicationUse.derivedFrom[x]
Definition | Prescriptions, dispenses or administrations that are the basis of this medication use statement.
Short | Prescriptions, dispenses or administrations that are the basis of this medication use statement.
Control | 0..*
Type | Choice of: http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSMedicationPrescription, http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSMedicationDispense, http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSMedicationAdministration
[x] Note | SeeChoice of Data Typesfor further information about how to use [x]
32. EHDSMedicationUse.note
Definition | Additional information about the medication use statement
Short | Additional information about the medication use statement
Control | 0..1
Type | string
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Obligations |
Obligations | Actor
SHOULD:able-to-populate | Producer

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

0. EHDSMedicationUse
Logical Model | Instances of this logical model are not marked to be the target of a Reference
2. EHDSMedicationUse.header
4. EHDSMedicationUse.header.subject
Obligations |
Obligations | Actor
SHALL:able-to-populate | Producer
6. EHDSMedicationUse.header.status
Obligations |
Obligations | Actor
SHALL:able-to-populate | Producer
8. EHDSMedicationUse.medication
Obligations |
Obligations | Actor
SHALL:able-to-populate | Producer
10. EHDSMedicationUse.reason[x]
[x] Note | SeeChoice of Data Typesfor further information about how to use [x]
Obligations |
Obligations | Actor
SHOULD:able-to-populate | Producer
12. EHDSMedicationUse.dosageInstructions
Obligations |
Obligations | Actor
SHALL:able-to-populate | Producer
14. EHDSMedicationUse.periodOfUse
Obligations |
Obligations | Actor
SHALL:able-to-populate | Producer
16. EHDSMedicationUse.note
Obligations |
Obligations | Actor
SHOULD:able-to-populate | Producer

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

0. EHDSMedicationUse
Definition | Statement about a single medication as part of a medication summary.
Short | Medication use model
Control | 0..*
Is Modifier | false
Logical Model | Instances of this logical model are not marked to be the target of a Reference
2. EHDSMedicationUse.header
Definition | Basic metadata for this information
Short | Basic metadata for this information
Control | 1..1
Type | Base
4. EHDSMedicationUse.header.subject
Definition | Patient/subject information
Short | Patient/subject information
Control | 1..1
Type | http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSPatient
Obligations |
Obligations | Actor
SHALL:able-to-populate | Producer
6. EHDSMedicationUse.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. EHDSMedicationUse.header.author[x]
Definition | The author of the medication use statement
Short | The author of the medication use statement
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. EHDSMedicationUse.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. EHDSMedicationUse.header.status
Definition | Status of the medication use statement (e.g. recorded)
Short | Status of the medication use statement (e.g. recorded)
Control | 1..1
Binding | HL7 MedicationStatement Status Codes
Type | CodeableConcept
Obligations |
Obligations | Actor
SHALL:able-to-populate | Producer
Requirements | eHN PS Guideline, MyHealth@EU, ISO IPS
14. EHDSMedicationUse.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. EHDSMedicationUse.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. EHDSMedicationUse.treatmentStatus
Definition | The current status of taking the medicine (e.g. taking, on-hold, stopped)
Short | The current status of taking the medicine (e.g. taking, on-hold, stopped)
Control | 0..1
Type | CodeableConcept
Requirements | MyHealth@EU
20. EHDSMedicationUse.changeType
Definition | Medication use's change type in a medication summary (e.g. 'added', 'removed', 'altered'). Relevant at the time of discharge or other alteration of the active medications' list.
Short | Medication use's change type in a medication summary (e.g. 'added', 'removed', 'altered'). Relevant at the time of discharge or other alteration of the active medications' list.
Control | 0..*
Type | CodeableConcept
22. EHDSMedicationUse.medication
Definition | Describes the medicinal product.
Short | Describes the medicinal product.
Control | 1..1
Type | http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSMedication
Obligations |
Obligations | Actor
SHALL:able-to-populate | Producer
Requirements | eHN PS Guideline, ISO IPS, MyHealth@EU
24. EHDSMedicationUse.reason[x]
Definition | Reason for the use of the medication (typically diagnosis, or a procedure)
Short | Reason for the use of the medication (typically diagnosis, or a procedure)
Control | 0..*
Type | Choice of: CodeableConcept, string
[x] Note | SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Obligations |
Obligations | Actor
SHOULD:able-to-populate | Producer
Requirements | eHN PS Guideline, ISO IPS, MyHealth@EU
26. EHDSMedicationUse.dosageInstructions
Definition | Details of how medication is/was taken or should be taken
Short | Details of how medication is/was taken or should be taken
Control | 1..1
Type | http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSDosage
Obligations |
Obligations | Actor
SHALL:able-to-populate | Producer
Requirements | eHN PS Guideline, ISO IPS, MyHealth@EU
28. EHDSMedicationUse.periodOfUse
Definition | Period when the patient took, is taking or is expected to take the medication
Short | Period when the patient took, is taking or is expected to take the medication
Control | 0..1
Type | Period
Obligations |
Obligations | Actor
SHALL:able-to-populate | Producer
Requirements | eHN PS Guideline, ISO IPS, MyHealth@EU
30. EHDSMedicationUse.derivedFrom[x]
Definition | Prescriptions, dispenses or administrations that are the basis of this medication use statement.
Short | Prescriptions, dispenses or administrations that are the basis of this medication use statement.
Control | 0..*
Type | Choice of: http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSMedicationPrescription, http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSMedicationDispense, http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSMedicationAdministration
[x] Note | SeeChoice of Data Typesfor further information about how to use [x]
32. EHDSMedicationUse.note
Definition | Additional information about the medication use statement
Short | Additional information about the medication use statement
Control | 0..1
Type | string
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Obligations |
Obligations | Actor
SHOULD:able-to-populate | Producer