EHDS Logical Information Models
0.2.1 - qa-preview

EHDS Logical Information Models, published by Xt-EHR. This guide is not an authorized publication; it is the continuous build for version 0.2.1 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/tree/stakeholder-consultation-D7-1 and changes regularly. See the Directory of published versions

## Logical Model: Dosage model

Official URL: http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSDosage | Version: 0.2.1
Draft as of 2026-02-09 | Computable Name: EHDSDosage

The model covers usage instructions for administering a medicinal product, focusing on the most frequently used data elements. More complex dosage schemes may require additional elements, which should be communicated as part of the rendered dosage instructions element.

Usages:

- Derived from this Logical Model: Administered dosage model
- Use this Logical Model: Medication dispense model, Medication prescription model and Medication use model

You can also check for usages in the FHIR IG Statistics

### Formal Views of Profile Content

Description of Profiles, Differentials, Snapshots and how the different presentations work.

- Key Elements Table
- Differential Table
- Snapshot Table
- Statistics/References
- All

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
EHDSDosage |  | 0..* | Base | Dosage model
renderedDosageInstruction |  | 0..1 | string | Full dosage information as human-readable text covering all dosage steps. Generating the text follows local rules and should include all locally implemented dosage data even when such elements are not present in this model.
dosageDetails |  | 0..* | Base | Details of single dosage scheme step
sequence |  | 0..1 | integer | Order of the dosage instruction, in case one treatment consists of several dosage steps. When two schemes share the same sequence number, they are meant to be running in parallel.
note |  | 0..1 | string | Patient oriented instructions as free text for this dosage step
doseAndRate |  | 0..* | Base | Amount of medication administered per one dose (= one timing)
dose[x] |  | 0..1 |  | Amount of medication per one dose. (1 tablet, 2-3 tablets, 20ml) Binding Description: (preferred): UCUM (units of measurement), EDQM Standard Terms (units of presentation)
doseQuantity |  |  | Quantity |
doseRange |  |  | Range |
rate[x] |  | 0..1 |  | Amount of medication per time period (e.g. 100mg per 1 hour). When rate is provided per 1 time unit, Quantity data type can be used with a suitable unit (e.g. mg/h, ug/min). Binding Description: (preferred): UCUM (units of measurement), EDQM Standard Terms (units of presentation)
rateQuantity |  |  | Quantity |
rateRatio |  |  | Ratio |
repeat |  | 0..1 | Base | Repetition of the administration.
bounds |  | 0..1 | Base | Time bounds for the treatment (current dosage scheme). Only one of the following can exist.
duration |  | 0..1 | Quantity | Number of time units, e.g 10 days Binding Description: (preferred): UCUM
period |  | 0..1 | Period | Start and end date, 05.08.2023 - 10.08.2023
duration |  | 0..1 | Quantity | Duration of administration (e.g '5 minutes', '1 hour') Binding Description: (preferred): UCUM
frequency |  | 0..1 | Base | Frequency of intake/administration (e.g 'three times a day')
numberOfTimes |  | 0..1 | integer | Number of times per period (e.g '3 times')
period |  | 0..1 | Quantity | Duration to which the frequency applies (e.g '... / 1 day') Binding Description: (preferred): UCUM
dayOfWeek |  | 0..* | CodeableConcept | The day of the week of administration, e.g Mon, Tue, etc
timeOfDay |  | 0..* | time | Exact time of day of administration (e.g '10:00')
eventTime |  | 0..* | CodeableConcept | Time period or event when the administration should happen ('before meal', 'immediately', 'morning')
asNeeded |  | 0..1 | boolean | Take as needed
bodySite |  | 0..1 | EHDSBodyStructure | Body site of administration
routeOfAdministration |  | 0..1 | CodeableConcept | Route of administration Binding Description: (preferred): EDQM Standard Terms
Documentation for this format

#### Terminology Bindings

Path | Status | Usage | ValueSet | Version | Source
EHDSDosage.dosageDetails.​doseAndRate.dose[x] | Base | preferred |  | Not State | Unknown
EHDSDosage.dosageDetails.​doseAndRate.rate[x] | Base | preferred |  | Not State | Unknown
EHDSDosage.dosageDetails.​repeat.bounds.duration | Base | preferred |  | Not State | Unknown
EHDSDosage.dosageDetails.​repeat.duration | Base | preferred |  | Not State | Unknown
EHDSDosage.dosageDetails.​repeat.frequency.period | Base | preferred |  | Not State | Unknown
EHDSDosage.dosageDetails.​routeOfAdministration | Base | preferred |  | Not State | Unknown

This structure is derived from Base

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
EHDSDosage |  | 0..* | Base | Dosage model
renderedDosageInstruction |  | 0..1 | string | Full dosage information as human-readable text covering all dosage steps. Generating the text follows local rules and should include all locally implemented dosage data even when such elements are not present in this model.
dosageDetails |  | 0..* | Base | Details of single dosage scheme step
sequence |  | 0..1 | integer | Order of the dosage instruction, in case one treatment consists of several dosage steps. When two schemes share the same sequence number, they are meant to be running in parallel.
note |  | 0..1 | string | Patient oriented instructions as free text for this dosage step
doseAndRate |  | 0..* | Base | Amount of medication administered per one dose (= one timing)
dose[x] |  | 0..1 |  | Amount of medication per one dose. (1 tablet, 2-3 tablets, 20ml) Binding Description: (preferred): UCUM (units of measurement), EDQM Standard Terms (units of presentation)
doseQuantity |  |  | Quantity |
doseRange |  |  | Range |
rate[x] |  | 0..1 |  | Amount of medication per time period (e.g. 100mg per 1 hour). When rate is provided per 1 time unit, Quantity data type can be used with a suitable unit (e.g. mg/h, ug/min). Binding Description: (preferred): UCUM (units of measurement), EDQM Standard Terms (units of presentation)
rateQuantity |  |  | Quantity |
rateRatio |  |  | Ratio |
repeat |  | 0..1 | Base | Repetition of the administration.
bounds |  | 0..1 | Base | Time bounds for the treatment (current dosage scheme). Only one of the following can exist.
duration |  | 0..1 | Quantity | Number of time units, e.g 10 days Binding Description: (preferred): UCUM
period |  | 0..1 | Period | Start and end date, 05.08.2023 - 10.08.2023
duration |  | 0..1 | Quantity | Duration of administration (e.g '5 minutes', '1 hour') Binding Description: (preferred): UCUM
frequency |  | 0..1 | Base | Frequency of intake/administration (e.g 'three times a day')
numberOfTimes |  | 0..1 | integer | Number of times per period (e.g '3 times')
period |  | 0..1 | Quantity | Duration to which the frequency applies (e.g '... / 1 day') Binding Description: (preferred): UCUM
dayOfWeek |  | 0..* | CodeableConcept | The day of the week of administration, e.g Mon, Tue, etc
timeOfDay |  | 0..* | time | Exact time of day of administration (e.g '10:00')
eventTime |  | 0..* | CodeableConcept | Time period or event when the administration should happen ('before meal', 'immediately', 'morning')
asNeeded |  | 0..1 | boolean | Take as needed
bodySite |  | 0..1 | EHDSBodyStructure | Body site of administration
routeOfAdministration |  | 0..1 | CodeableConcept | Route of administration Binding Description: (preferred): EDQM Standard Terms
Documentation for this format

#### Terminology Bindings (Differential)

Path | Status | Usage | ValueSet | Version | Source
EHDSDosage.dosageDetails.​doseAndRate.dose[x] | Base | preferred |  | Not State | Unknown
EHDSDosage.dosageDetails.​doseAndRate.rate[x] | Base | preferred |  | Not State | Unknown
EHDSDosage.dosageDetails.​repeat.bounds.duration | Base | preferred |  | Not State | Unknown
EHDSDosage.dosageDetails.​repeat.duration | Base | preferred |  | Not State | Unknown
EHDSDosage.dosageDetails.​repeat.frequency.period | Base | preferred |  | Not State | Unknown
EHDSDosage.dosageDetails.​routeOfAdministration | Base | preferred |  | Not State | Unknown

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
EHDSDosage |  | 0..* | Base | Dosage model
renderedDosageInstruction |  | 0..1 | string | Full dosage information as human-readable text covering all dosage steps. Generating the text follows local rules and should include all locally implemented dosage data even when such elements are not present in this model.
dosageDetails |  | 0..* | Base | Details of single dosage scheme step
sequence |  | 0..1 | integer | Order of the dosage instruction, in case one treatment consists of several dosage steps. When two schemes share the same sequence number, they are meant to be running in parallel.
note |  | 0..1 | string | Patient oriented instructions as free text for this dosage step
doseAndRate |  | 0..* | Base | Amount of medication administered per one dose (= one timing)
dose[x] |  | 0..1 |  | Amount of medication per one dose. (1 tablet, 2-3 tablets, 20ml) Binding Description: (preferred): UCUM (units of measurement), EDQM Standard Terms (units of presentation)
doseQuantity |  |  | Quantity |
doseRange |  |  | Range |
rate[x] |  | 0..1 |  | Amount of medication per time period (e.g. 100mg per 1 hour). When rate is provided per 1 time unit, Quantity data type can be used with a suitable unit (e.g. mg/h, ug/min). Binding Description: (preferred): UCUM (units of measurement), EDQM Standard Terms (units of presentation)
rateQuantity |  |  | Quantity |
rateRatio |  |  | Ratio |
repeat |  | 0..1 | Base | Repetition of the administration.
bounds |  | 0..1 | Base | Time bounds for the treatment (current dosage scheme). Only one of the following can exist.
duration |  | 0..1 | Quantity | Number of time units, e.g 10 days Binding Description: (preferred): UCUM
period |  | 0..1 | Period | Start and end date, 05.08.2023 - 10.08.2023
duration |  | 0..1 | Quantity | Duration of administration (e.g '5 minutes', '1 hour') Binding Description: (preferred): UCUM
frequency |  | 0..1 | Base | Frequency of intake/administration (e.g 'three times a day')
numberOfTimes |  | 0..1 | integer | Number of times per period (e.g '3 times')
period |  | 0..1 | Quantity | Duration to which the frequency applies (e.g '... / 1 day') Binding Description: (preferred): UCUM
dayOfWeek |  | 0..* | CodeableConcept | The day of the week of administration, e.g Mon, Tue, etc
timeOfDay |  | 0..* | time | Exact time of day of administration (e.g '10:00')
eventTime |  | 0..* | CodeableConcept | Time period or event when the administration should happen ('before meal', 'immediately', 'morning')
asNeeded |  | 0..1 | boolean | Take as needed
bodySite |  | 0..1 | EHDSBodyStructure | Body site of administration
routeOfAdministration |  | 0..1 | CodeableConcept | Route of administration Binding Description: (preferred): EDQM Standard Terms
Documentation for this format

#### Terminology Bindings

Path | Status | Usage | ValueSet | Version | Source
EHDSDosage.dosageDetails.​doseAndRate.dose[x] | Base | preferred |  | Not State | Unknown
EHDSDosage.dosageDetails.​doseAndRate.rate[x] | Base | preferred |  | Not State | Unknown
EHDSDosage.dosageDetails.​repeat.bounds.duration | Base | preferred |  | Not State | Unknown
EHDSDosage.dosageDetails.​repeat.duration | Base | preferred |  | Not State | Unknown
EHDSDosage.dosageDetails.​repeat.frequency.period | Base | preferred |  | Not State | Unknown
EHDSDosage.dosageDetails.​routeOfAdministration | Base | preferred |  | Not State | Unknown

This structure is derived from Base

Summary

Key Elements View

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
EHDSDosage |  | 0..* | Base | Dosage model
renderedDosageInstruction |  | 0..1 | string | Full dosage information as human-readable text covering all dosage steps. Generating the text follows local rules and should include all locally implemented dosage data even when such elements are not present in this model.
dosageDetails |  | 0..* | Base | Details of single dosage scheme step
sequence |  | 0..1 | integer | Order of the dosage instruction, in case one treatment consists of several dosage steps. When two schemes share the same sequence number, they are meant to be running in parallel.
note |  | 0..1 | string | Patient oriented instructions as free text for this dosage step
doseAndRate |  | 0..* | Base | Amount of medication administered per one dose (= one timing)
dose[x] |  | 0..1 |  | Amount of medication per one dose. (1 tablet, 2-3 tablets, 20ml) Binding Description: (preferred): UCUM (units of measurement), EDQM Standard Terms (units of presentation)
doseQuantity |  |  | Quantity |
doseRange |  |  | Range |
rate[x] |  | 0..1 |  | Amount of medication per time period (e.g. 100mg per 1 hour). When rate is provided per 1 time unit, Quantity data type can be used with a suitable unit (e.g. mg/h, ug/min). Binding Description: (preferred): UCUM (units of measurement), EDQM Standard Terms (units of presentation)
rateQuantity |  |  | Quantity |
rateRatio |  |  | Ratio |
repeat |  | 0..1 | Base | Repetition of the administration.
bounds |  | 0..1 | Base | Time bounds for the treatment (current dosage scheme). Only one of the following can exist.
duration |  | 0..1 | Quantity | Number of time units, e.g 10 days Binding Description: (preferred): UCUM
period |  | 0..1 | Period | Start and end date, 05.08.2023 - 10.08.2023
duration |  | 0..1 | Quantity | Duration of administration (e.g '5 minutes', '1 hour') Binding Description: (preferred): UCUM
frequency |  | 0..1 | Base | Frequency of intake/administration (e.g 'three times a day')
numberOfTimes |  | 0..1 | integer | Number of times per period (e.g '3 times')
period |  | 0..1 | Quantity | Duration to which the frequency applies (e.g '... / 1 day') Binding Description: (preferred): UCUM
dayOfWeek |  | 0..* | CodeableConcept | The day of the week of administration, e.g Mon, Tue, etc
timeOfDay |  | 0..* | time | Exact time of day of administration (e.g '10:00')
eventTime |  | 0..* | CodeableConcept | Time period or event when the administration should happen ('before meal', 'immediately', 'morning')
asNeeded |  | 0..1 | boolean | Take as needed
bodySite |  | 0..1 | EHDSBodyStructure | Body site of administration
routeOfAdministration |  | 0..1 | CodeableConcept | Route of administration Binding Description: (preferred): EDQM Standard Terms
Documentation for this format

#### Terminology Bindings

Path | Status | Usage | ValueSet | Version | Source
EHDSDosage.dosageDetails.​doseAndRate.dose[x] | Base | preferred |  | Not State | Unknown
EHDSDosage.dosageDetails.​doseAndRate.rate[x] | Base | preferred |  | Not State | Unknown
EHDSDosage.dosageDetails.​repeat.bounds.duration | Base | preferred |  | Not State | Unknown
EHDSDosage.dosageDetails.​repeat.duration | Base | preferred |  | Not State | Unknown
EHDSDosage.dosageDetails.​repeat.frequency.period | Base | preferred |  | Not State | Unknown
EHDSDosage.dosageDetails.​routeOfAdministration | Base | preferred |  | Not State | Unknown

Differential View

This structure is derived from Base

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
EHDSDosage |  | 0..* | Base | Dosage model
renderedDosageInstruction |  | 0..1 | string | Full dosage information as human-readable text covering all dosage steps. Generating the text follows local rules and should include all locally implemented dosage data even when such elements are not present in this model.
dosageDetails |  | 0..* | Base | Details of single dosage scheme step
sequence |  | 0..1 | integer | Order of the dosage instruction, in case one treatment consists of several dosage steps. When two schemes share the same sequence number, they are meant to be running in parallel.
note |  | 0..1 | string | Patient oriented instructions as free text for this dosage step
doseAndRate |  | 0..* | Base | Amount of medication administered per one dose (= one timing)
dose[x] |  | 0..1 |  | Amount of medication per one dose. (1 tablet, 2-3 tablets, 20ml) Binding Description: (preferred): UCUM (units of measurement), EDQM Standard Terms (units of presentation)
doseQuantity |  |  | Quantity |
doseRange |  |  | Range |
rate[x] |  | 0..1 |  | Amount of medication per time period (e.g. 100mg per 1 hour). When rate is provided per 1 time unit, Quantity data type can be used with a suitable unit (e.g. mg/h, ug/min). Binding Description: (preferred): UCUM (units of measurement), EDQM Standard Terms (units of presentation)
rateQuantity |  |  | Quantity |
rateRatio |  |  | Ratio |
repeat |  | 0..1 | Base | Repetition of the administration.
bounds |  | 0..1 | Base | Time bounds for the treatment (current dosage scheme). Only one of the following can exist.
duration |  | 0..1 | Quantity | Number of time units, e.g 10 days Binding Description: (preferred): UCUM
period |  | 0..1 | Period | Start and end date, 05.08.2023 - 10.08.2023
duration |  | 0..1 | Quantity | Duration of administration (e.g '5 minutes', '1 hour') Binding Description: (preferred): UCUM
frequency |  | 0..1 | Base | Frequency of intake/administration (e.g 'three times a day')
numberOfTimes |  | 0..1 | integer | Number of times per period (e.g '3 times')
period |  | 0..1 | Quantity | Duration to which the frequency applies (e.g '... / 1 day') Binding Description: (preferred): UCUM
dayOfWeek |  | 0..* | CodeableConcept | The day of the week of administration, e.g Mon, Tue, etc
timeOfDay |  | 0..* | time | Exact time of day of administration (e.g '10:00')
eventTime |  | 0..* | CodeableConcept | Time period or event when the administration should happen ('before meal', 'immediately', 'morning')
asNeeded |  | 0..1 | boolean | Take as needed
bodySite |  | 0..1 | EHDSBodyStructure | Body site of administration
routeOfAdministration |  | 0..1 | CodeableConcept | Route of administration Binding Description: (preferred): EDQM Standard Terms
Documentation for this format

#### Terminology Bindings (Differential)

Path | Status | Usage | ValueSet | Version | Source
EHDSDosage.dosageDetails.​doseAndRate.dose[x] | Base | preferred |  | Not State | Unknown
EHDSDosage.dosageDetails.​doseAndRate.rate[x] | Base | preferred |  | Not State | Unknown
EHDSDosage.dosageDetails.​repeat.bounds.duration | Base | preferred |  | Not State | Unknown
EHDSDosage.dosageDetails.​repeat.duration | Base | preferred |  | Not State | Unknown
EHDSDosage.dosageDetails.​repeat.frequency.period | Base | preferred |  | Not State | Unknown
EHDSDosage.dosageDetails.​routeOfAdministration | Base | preferred |  | Not State | Unknown

Snapshot View

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
EHDSDosage |  | 0..* | Base | Dosage model
renderedDosageInstruction |  | 0..1 | string | Full dosage information as human-readable text covering all dosage steps. Generating the text follows local rules and should include all locally implemented dosage data even when such elements are not present in this model.
dosageDetails |  | 0..* | Base | Details of single dosage scheme step
sequence |  | 0..1 | integer | Order of the dosage instruction, in case one treatment consists of several dosage steps. When two schemes share the same sequence number, they are meant to be running in parallel.
note |  | 0..1 | string | Patient oriented instructions as free text for this dosage step
doseAndRate |  | 0..* | Base | Amount of medication administered per one dose (= one timing)
dose[x] |  | 0..1 |  | Amount of medication per one dose. (1 tablet, 2-3 tablets, 20ml) Binding Description: (preferred): UCUM (units of measurement), EDQM Standard Terms (units of presentation)
doseQuantity |  |  | Quantity |
doseRange |  |  | Range |
rate[x] |  | 0..1 |  | Amount of medication per time period (e.g. 100mg per 1 hour). When rate is provided per 1 time unit, Quantity data type can be used with a suitable unit (e.g. mg/h, ug/min). Binding Description: (preferred): UCUM (units of measurement), EDQM Standard Terms (units of presentation)
rateQuantity |  |  | Quantity |
rateRatio |  |  | Ratio |
repeat |  | 0..1 | Base | Repetition of the administration.
bounds |  | 0..1 | Base | Time bounds for the treatment (current dosage scheme). Only one of the following can exist.
duration |  | 0..1 | Quantity | Number of time units, e.g 10 days Binding Description: (preferred): UCUM
period |  | 0..1 | Period | Start and end date, 05.08.2023 - 10.08.2023
duration |  | 0..1 | Quantity | Duration of administration (e.g '5 minutes', '1 hour') Binding Description: (preferred): UCUM
frequency |  | 0..1 | Base | Frequency of intake/administration (e.g 'three times a day')
numberOfTimes |  | 0..1 | integer | Number of times per period (e.g '3 times')
period |  | 0..1 | Quantity | Duration to which the frequency applies (e.g '... / 1 day') Binding Description: (preferred): UCUM
dayOfWeek |  | 0..* | CodeableConcept | The day of the week of administration, e.g Mon, Tue, etc
timeOfDay |  | 0..* | time | Exact time of day of administration (e.g '10:00')
eventTime |  | 0..* | CodeableConcept | Time period or event when the administration should happen ('before meal', 'immediately', 'morning')
asNeeded |  | 0..1 | boolean | Take as needed
bodySite |  | 0..1 | EHDSBodyStructure | Body site of administration
routeOfAdministration |  | 0..1 | CodeableConcept | Route of administration Binding Description: (preferred): EDQM Standard Terms
Documentation for this format

#### Terminology Bindings

Path | Status | Usage | ValueSet | Version | Source
EHDSDosage.dosageDetails.​doseAndRate.dose[x] | Base | preferred |  | Not State | Unknown
EHDSDosage.dosageDetails.​doseAndRate.rate[x] | Base | preferred |  | Not State | Unknown
EHDSDosage.dosageDetails.​repeat.bounds.duration | Base | preferred |  | Not State | Unknown
EHDSDosage.dosageDetails.​repeat.duration | Base | preferred |  | Not State | Unknown
EHDSDosage.dosageDetails.​repeat.frequency.period | Base | preferred |  | Not State | Unknown
EHDSDosage.dosageDetails.​routeOfAdministration | Base | preferred |  | Not State | Unknown

This structure is derived from Base

Summary

Other representations of profile: CSV, Excel