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: Service request model

Official URL: http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSServiceRequest | Version: 0.4.0
Draft as of 2026-03-03 | Computable Name: EHDSServiceRequest

The model covers details about a requested service or services. One order may include several requests.

Usages:

- Use this Logical Model: Encounter model, Imaging study model, Laboratory report model, Observation model and Specimen 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
--- | --- | --- | --- | ---
EHDSServiceRequest |  | 0..* | EHDSDataSet | Service request model Elements defined in Ancestors:header
header |  | 1..1 | Base | Basic metadata for this information
subject |  | 1..1 | EHDSPatient | Patient/subject information
identifier |  | 0..* | Identifier | Business identifier for the object, unique within its system. Supporting disambiguation between different contexts (systems/countries).
author[x] |  | 0..* |  | Author(s) responsible for the provided information.
authorEHDSHealthProfessional |  |  | EHDSHealthProfessional |
authorEHDSOrganisation |  |  | EHDSOrganisation |
authorEHDSDevice |  |  | EHDSDevice |
date |  | 0..1 | dateTime | Date and optionally time of authoring/issuing
status |  | 1..1 | CodeableConcept | Status of the resource or document
source |  | 0..1 | CodeableConcept | 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.
language |  | 0..1 | CodeableConcept | Language in which the resource is written. Language is expressed by the IETF language tag. Binding Description: (preferred): BCP 47
description |  | 0..1 | string | Textual description of the requested service
code |  | 0..1 | CodeableConcept | A code and name that identifies a particular service (i.e., procedure, diagnostic investigation, or panel of investigations) that have been requested. Binding Description: (preferred): LOINC, NPU, SNOMED CT
quantity |  | 0..1 | Quantity | Amount of requested services of the same type
bodySite |  | 0..* | EHDSBodyStructure | Anatomic location and laterality where the procedure should be performed. This is the target site.
reason[x] |  | 0..* |  | Reason why this service is being requested. Binding Description: (preferred): ICD-10, SNOMED CT, Orphacode
reasonEHDSObservation |  |  | EHDSObservation |
reasonEHDSCondition |  |  | EHDSCondition |
reasonEHDSMedication |  |  | EHDSMedication |
reasonString |  |  | string |
priority |  | 0..1 | CodeableConcept | Indicates how quickly the request should be addressed with respect to other requests. Binding Description: (preferred): HL7 Request Priority
supportingInformation[x] |  | 0..* |  | Health conditions relevant for the results interpretation, e.g. fasting status, sex for clinical use, etc.
supportingInformationEHDSObservation |  |  | EHDSObservation |
supportingInformationEHDSCondition |  |  | EHDSCondition |
supportingInformationEHDSProcedure |  |  | EHDSProcedure |
supportingInformationEHDSMedicationAdministration |  |  | EHDSMedicationAdministration |
specimen |  | 0..* | EHDSSpecimen | Specimens to be used by the laboratory procedure
encounter |  | 0..1 | EHDSEncounter | The encounter that provides additional information about the healthcare context in which this request is made.
occurrence[x] |  | 0..1 |  | Expected time of the service
occurrenceDateTime |  |  | dateTime |
occurrencePeriod |  |  | Period |
patientInstructions |  | 0..1 | string | Patient or consumer-oriented instructions
Documentation for this format

#### Terminology Bindings

Path | Status | Usage | ValueSet | Version | Source
EHDSServiceRequest.header.​language | Base | preferred |  | Not State | Unknown
EHDSServiceRequest.code | Base | preferred |  | Not State | Unknown
EHDSServiceRequest.reason[x] | Base | preferred |  | Not State | Unknown
EHDSServiceRequest.priority | Base | preferred |  | Not State | Unknown

This structure is derived from EHDSDataSet

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
EHDSServiceRequest |  | 0..* | EHDSDataSet | Service request model Elements defined in Ancestors:header
description |  | 0..1 | string | Textual description of the requested service
code |  | 0..1 | CodeableConcept | A code and name that identifies a particular service (i.e., procedure, diagnostic investigation, or panel of investigations) that have been requested. Binding Description: (preferred): LOINC, NPU, SNOMED CT
quantity |  | 0..1 | Quantity | Amount of requested services of the same type
bodySite |  | 0..* | EHDSBodyStructure | Anatomic location and laterality where the procedure should be performed. This is the target site.
reason[x] |  | 0..* |  | Reason why this service is being requested. Binding Description: (preferred): ICD-10, SNOMED CT, Orphacode
reasonEHDSObservation |  |  | EHDSObservation |
reasonEHDSCondition |  |  | EHDSCondition |
reasonEHDSMedication |  |  | EHDSMedication |
reasonString |  |  | string |
priority |  | 0..1 | CodeableConcept | Indicates how quickly the request should be addressed with respect to other requests. Binding Description: (preferred): HL7 Request Priority
supportingInformation[x] |  | 0..* |  | Health conditions relevant for the results interpretation, e.g. fasting status, sex for clinical use, etc.
supportingInformationEHDSObservation |  |  | EHDSObservation |
supportingInformationEHDSCondition |  |  | EHDSCondition |
supportingInformationEHDSProcedure |  |  | EHDSProcedure |
supportingInformationEHDSMedicationAdministration |  |  | EHDSMedicationAdministration |
specimen |  | 0..* | EHDSSpecimen | Specimens to be used by the laboratory procedure
encounter |  | 0..1 | EHDSEncounter | The encounter that provides additional information about the healthcare context in which this request is made.
occurrence[x] |  | 0..1 |  | Expected time of the service
occurrenceDateTime |  |  | dateTime |
occurrencePeriod |  |  | Period |
patientInstructions |  | 0..1 | string | Patient or consumer-oriented instructions
Documentation for this format

#### Terminology Bindings (Differential)

Path | Status | Usage | ValueSet | Version | Source
EHDSServiceRequest.code | Base | preferred |  | Not State | Unknown
EHDSServiceRequest.reason[x] | Base | preferred |  | Not State | Unknown
EHDSServiceRequest.priority | Base | preferred |  | Not State | Unknown

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
EHDSServiceRequest |  | 0..* | EHDSDataSet | Service request model Elements defined in Ancestors:header
header |  | 1..1 | Base | Basic metadata for this information
subject |  | 1..1 | EHDSPatient | Patient/subject information
identifier |  | 0..* | Identifier | Business identifier for the object, unique within its system. Supporting disambiguation between different contexts (systems/countries).
author[x] |  | 0..* |  | Author(s) responsible for the provided information.
authorEHDSHealthProfessional |  |  | EHDSHealthProfessional |
authorEHDSOrganisation |  |  | EHDSOrganisation |
authorEHDSDevice |  |  | EHDSDevice |
date |  | 0..1 | dateTime | Date and optionally time of authoring/issuing
status |  | 1..1 | CodeableConcept | Status of the resource or document
source |  | 0..1 | CodeableConcept | 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.
language |  | 0..1 | CodeableConcept | Language in which the resource is written. Language is expressed by the IETF language tag. Binding Description: (preferred): BCP 47
description |  | 0..1 | string | Textual description of the requested service
code |  | 0..1 | CodeableConcept | A code and name that identifies a particular service (i.e., procedure, diagnostic investigation, or panel of investigations) that have been requested. Binding Description: (preferred): LOINC, NPU, SNOMED CT
quantity |  | 0..1 | Quantity | Amount of requested services of the same type
bodySite |  | 0..* | EHDSBodyStructure | Anatomic location and laterality where the procedure should be performed. This is the target site.
reason[x] |  | 0..* |  | Reason why this service is being requested. Binding Description: (preferred): ICD-10, SNOMED CT, Orphacode
reasonEHDSObservation |  |  | EHDSObservation |
reasonEHDSCondition |  |  | EHDSCondition |
reasonEHDSMedication |  |  | EHDSMedication |
reasonString |  |  | string |
priority |  | 0..1 | CodeableConcept | Indicates how quickly the request should be addressed with respect to other requests. Binding Description: (preferred): HL7 Request Priority
supportingInformation[x] |  | 0..* |  | Health conditions relevant for the results interpretation, e.g. fasting status, sex for clinical use, etc.
supportingInformationEHDSObservation |  |  | EHDSObservation |
supportingInformationEHDSCondition |  |  | EHDSCondition |
supportingInformationEHDSProcedure |  |  | EHDSProcedure |
supportingInformationEHDSMedicationAdministration |  |  | EHDSMedicationAdministration |
specimen |  | 0..* | EHDSSpecimen | Specimens to be used by the laboratory procedure
encounter |  | 0..1 | EHDSEncounter | The encounter that provides additional information about the healthcare context in which this request is made.
occurrence[x] |  | 0..1 |  | Expected time of the service
occurrenceDateTime |  |  | dateTime |
occurrencePeriod |  |  | Period |
patientInstructions |  | 0..1 | string | Patient or consumer-oriented instructions
Documentation for this format

#### Terminology Bindings

Path | Status | Usage | ValueSet | Version | Source
EHDSServiceRequest.header.​language | Base | preferred |  | Not State | Unknown
EHDSServiceRequest.code | Base | preferred |  | Not State | Unknown
EHDSServiceRequest.reason[x] | Base | preferred |  | Not State | Unknown
EHDSServiceRequest.priority | Base | preferred |  | Not State | Unknown

This structure is derived from EHDSDataSet

Summary

Key Elements View

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
EHDSServiceRequest |  | 0..* | EHDSDataSet | Service request model Elements defined in Ancestors:header
header |  | 1..1 | Base | Basic metadata for this information
subject |  | 1..1 | EHDSPatient | Patient/subject information
identifier |  | 0..* | Identifier | Business identifier for the object, unique within its system. Supporting disambiguation between different contexts (systems/countries).
author[x] |  | 0..* |  | Author(s) responsible for the provided information.
authorEHDSHealthProfessional |  |  | EHDSHealthProfessional |
authorEHDSOrganisation |  |  | EHDSOrganisation |
authorEHDSDevice |  |  | EHDSDevice |
date |  | 0..1 | dateTime | Date and optionally time of authoring/issuing
status |  | 1..1 | CodeableConcept | Status of the resource or document
source |  | 0..1 | CodeableConcept | 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.
language |  | 0..1 | CodeableConcept | Language in which the resource is written. Language is expressed by the IETF language tag. Binding Description: (preferred): BCP 47
description |  | 0..1 | string | Textual description of the requested service
code |  | 0..1 | CodeableConcept | A code and name that identifies a particular service (i.e., procedure, diagnostic investigation, or panel of investigations) that have been requested. Binding Description: (preferred): LOINC, NPU, SNOMED CT
quantity |  | 0..1 | Quantity | Amount of requested services of the same type
bodySite |  | 0..* | EHDSBodyStructure | Anatomic location and laterality where the procedure should be performed. This is the target site.
reason[x] |  | 0..* |  | Reason why this service is being requested. Binding Description: (preferred): ICD-10, SNOMED CT, Orphacode
reasonEHDSObservation |  |  | EHDSObservation |
reasonEHDSCondition |  |  | EHDSCondition |
reasonEHDSMedication |  |  | EHDSMedication |
reasonString |  |  | string |
priority |  | 0..1 | CodeableConcept | Indicates how quickly the request should be addressed with respect to other requests. Binding Description: (preferred): HL7 Request Priority
supportingInformation[x] |  | 0..* |  | Health conditions relevant for the results interpretation, e.g. fasting status, sex for clinical use, etc.
supportingInformationEHDSObservation |  |  | EHDSObservation |
supportingInformationEHDSCondition |  |  | EHDSCondition |
supportingInformationEHDSProcedure |  |  | EHDSProcedure |
supportingInformationEHDSMedicationAdministration |  |  | EHDSMedicationAdministration |
specimen |  | 0..* | EHDSSpecimen | Specimens to be used by the laboratory procedure
encounter |  | 0..1 | EHDSEncounter | The encounter that provides additional information about the healthcare context in which this request is made.
occurrence[x] |  | 0..1 |  | Expected time of the service
occurrenceDateTime |  |  | dateTime |
occurrencePeriod |  |  | Period |
patientInstructions |  | 0..1 | string | Patient or consumer-oriented instructions
Documentation for this format

#### Terminology Bindings

Path | Status | Usage | ValueSet | Version | Source
EHDSServiceRequest.header.​language | Base | preferred |  | Not State | Unknown
EHDSServiceRequest.code | Base | preferred |  | Not State | Unknown
EHDSServiceRequest.reason[x] | Base | preferred |  | Not State | Unknown
EHDSServiceRequest.priority | Base | preferred |  | Not State | Unknown

Differential View

This structure is derived from EHDSDataSet

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
EHDSServiceRequest |  | 0..* | EHDSDataSet | Service request model Elements defined in Ancestors:header
description |  | 0..1 | string | Textual description of the requested service
code |  | 0..1 | CodeableConcept | A code and name that identifies a particular service (i.e., procedure, diagnostic investigation, or panel of investigations) that have been requested. Binding Description: (preferred): LOINC, NPU, SNOMED CT
quantity |  | 0..1 | Quantity | Amount of requested services of the same type
bodySite |  | 0..* | EHDSBodyStructure | Anatomic location and laterality where the procedure should be performed. This is the target site.
reason[x] |  | 0..* |  | Reason why this service is being requested. Binding Description: (preferred): ICD-10, SNOMED CT, Orphacode
reasonEHDSObservation |  |  | EHDSObservation |
reasonEHDSCondition |  |  | EHDSCondition |
reasonEHDSMedication |  |  | EHDSMedication |
reasonString |  |  | string |
priority |  | 0..1 | CodeableConcept | Indicates how quickly the request should be addressed with respect to other requests. Binding Description: (preferred): HL7 Request Priority
supportingInformation[x] |  | 0..* |  | Health conditions relevant for the results interpretation, e.g. fasting status, sex for clinical use, etc.
supportingInformationEHDSObservation |  |  | EHDSObservation |
supportingInformationEHDSCondition |  |  | EHDSCondition |
supportingInformationEHDSProcedure |  |  | EHDSProcedure |
supportingInformationEHDSMedicationAdministration |  |  | EHDSMedicationAdministration |
specimen |  | 0..* | EHDSSpecimen | Specimens to be used by the laboratory procedure
encounter |  | 0..1 | EHDSEncounter | The encounter that provides additional information about the healthcare context in which this request is made.
occurrence[x] |  | 0..1 |  | Expected time of the service
occurrenceDateTime |  |  | dateTime |
occurrencePeriod |  |  | Period |
patientInstructions |  | 0..1 | string | Patient or consumer-oriented instructions
Documentation for this format

#### Terminology Bindings (Differential)

Path | Status | Usage | ValueSet | Version | Source
EHDSServiceRequest.code | Base | preferred |  | Not State | Unknown
EHDSServiceRequest.reason[x] | Base | preferred |  | Not State | Unknown
EHDSServiceRequest.priority | Base | preferred |  | Not State | Unknown

Snapshot View

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
EHDSServiceRequest |  | 0..* | EHDSDataSet | Service request model Elements defined in Ancestors:header
header |  | 1..1 | Base | Basic metadata for this information
subject |  | 1..1 | EHDSPatient | Patient/subject information
identifier |  | 0..* | Identifier | Business identifier for the object, unique within its system. Supporting disambiguation between different contexts (systems/countries).
author[x] |  | 0..* |  | Author(s) responsible for the provided information.
authorEHDSHealthProfessional |  |  | EHDSHealthProfessional |
authorEHDSOrganisation |  |  | EHDSOrganisation |
authorEHDSDevice |  |  | EHDSDevice |
date |  | 0..1 | dateTime | Date and optionally time of authoring/issuing
status |  | 1..1 | CodeableConcept | Status of the resource or document
source |  | 0..1 | CodeableConcept | 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.
language |  | 0..1 | CodeableConcept | Language in which the resource is written. Language is expressed by the IETF language tag. Binding Description: (preferred): BCP 47
description |  | 0..1 | string | Textual description of the requested service
code |  | 0..1 | CodeableConcept | A code and name that identifies a particular service (i.e., procedure, diagnostic investigation, or panel of investigations) that have been requested. Binding Description: (preferred): LOINC, NPU, SNOMED CT
quantity |  | 0..1 | Quantity | Amount of requested services of the same type
bodySite |  | 0..* | EHDSBodyStructure | Anatomic location and laterality where the procedure should be performed. This is the target site.
reason[x] |  | 0..* |  | Reason why this service is being requested. Binding Description: (preferred): ICD-10, SNOMED CT, Orphacode
reasonEHDSObservation |  |  | EHDSObservation |
reasonEHDSCondition |  |  | EHDSCondition |
reasonEHDSMedication |  |  | EHDSMedication |
reasonString |  |  | string |
priority |  | 0..1 | CodeableConcept | Indicates how quickly the request should be addressed with respect to other requests. Binding Description: (preferred): HL7 Request Priority
supportingInformation[x] |  | 0..* |  | Health conditions relevant for the results interpretation, e.g. fasting status, sex for clinical use, etc.
supportingInformationEHDSObservation |  |  | EHDSObservation |
supportingInformationEHDSCondition |  |  | EHDSCondition |
supportingInformationEHDSProcedure |  |  | EHDSProcedure |
supportingInformationEHDSMedicationAdministration |  |  | EHDSMedicationAdministration |
specimen |  | 0..* | EHDSSpecimen | Specimens to be used by the laboratory procedure
encounter |  | 0..1 | EHDSEncounter | The encounter that provides additional information about the healthcare context in which this request is made.
occurrence[x] |  | 0..1 |  | Expected time of the service
occurrenceDateTime |  |  | dateTime |
occurrencePeriod |  |  | Period |
patientInstructions |  | 0..1 | string | Patient or consumer-oriented instructions
Documentation for this format

#### Terminology Bindings

Path | Status | Usage | ValueSet | Version | Source
EHDSServiceRequest.header.​language | Base | preferred |  | Not State | Unknown
EHDSServiceRequest.code | Base | preferred |  | Not State | Unknown
EHDSServiceRequest.reason[x] | Base | preferred |  | Not State | Unknown
EHDSServiceRequest.priority | Base | preferred |  | Not State | Unknown

This structure is derived from EHDSDataSet

Summary

Other representations of profile: CSV, Excel