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: EHDSServiceRequest - Detailed Descriptions

Draft as of 2026-02-23

Definitions for the EHDSServiceRequest 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. EHDSServiceRequest
Definition | The model covers details about a requested service or services. One order may include several requests. Base definition for all types defined in FHIR type system.
Short | Service request 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. EHDSServiceRequest.header
Definition | Basic metadata for this information
Short | Basic metadata for this information
Control | 1..1
Type | Base
4. EHDSServiceRequest.header.subject
Definition | Patient/subject information
Short | Patient/subject information
Control | 1..1
Type | http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSPatient
6. EHDSServiceRequest.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. EHDSServiceRequest.header.author[x]
Definition | Author(s) responsible for the provided information. The exact role of the responsible author varies across use cases and is specific to individual models.
Short | Author(s) responsible for the provided information.
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. EHDSServiceRequest.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. EHDSServiceRequest.header.status
Definition | Status of the resource or document
Short | Status of the resource or document
Control | 1..1
Type | CodeableConcept
14. EHDSServiceRequest.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. EHDSServiceRequest.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. EHDSServiceRequest.description
Definition | Textual description of the requested service
Short | Textual description of the requested service
Control | 0..1
Type | string
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
20. EHDSServiceRequest.code
Definition | A code and name that identifies a particular service (i.e., procedure, diagnostic investigation, or panel of investigations) that have been requested.
Short | A code and name that identifies a particular service (i.e., procedure, diagnostic investigation, or panel of investigations) that have been requested.
Control | 0..1
Binding | LOINC, NPU, SNOMED CT
Type | CodeableConcept
22. EHDSServiceRequest.quantity
Definition | Amount of requested services of the same type
Short | Amount of requested services of the same type
Control | 0..1
Type | Quantity
24. EHDSServiceRequest.bodySite
Definition | Anatomic location and laterality where the procedure should be performed. This is the target site.
Short | Anatomic location and laterality where the procedure should be performed. This is the target site.
Control | 0..*
Type | http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSBodyStructure
26. EHDSServiceRequest.reason[x]
Definition | Reason why this service is being requested.
Short | Reason why this service is being requested.
Control | 0..*
Binding | ICD-10, SNOMED CT, Orphacode
Type | Choice of: http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSObservation, http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSCondition, http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSMedication, 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
28. EHDSServiceRequest.priority
Definition | Indicates how quickly the request should be addressed with respect to other requests.
Short | Indicates how quickly the request should be addressed with respect to other requests.
Control | 0..1
Binding | HL7 Request Priority
Type | CodeableConcept
30. EHDSServiceRequest.supportingInformation[x]
Definition | Health conditions relevant for the results interpretation, e.g. fasting status, sex for clinical use, etc.
Short | Health conditions relevant for the results interpretation, e.g. fasting status, sex for clinical use, etc.
Control | 0..*
Type | Choice of: http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSObservation, http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSCondition, http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSProcedure, http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSMedicationAdministration
[x] Note | SeeChoice of Data Typesfor further information about how to use [x]
32. EHDSServiceRequest.specimen
Definition | Specimens to be used by the laboratory procedure
Short | Specimens to be used by the laboratory procedure
Control | 0..*
Type | http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSSpecimen
34. EHDSServiceRequest.encounter
Definition | The encounter that provides additional information about the healthcare context in which this request is made.
Short | The encounter that provides additional information about the healthcare context in which this request is made.
Control | 0..1
Type | http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSEncounter
36. EHDSServiceRequest.occurrence[x]
Definition | Expected time of the service
Short | Expected time of the service
Control | 0..1
Type | Choice of: dateTime, Period
[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
38. EHDSServiceRequest.patientInstructions
Definition | Patient or consumer-oriented instructions
Short | Patient or consumer-oriented instructions
Control | 0..1
Type | string
Primitive Value | This primitive element may be present, or absent, or replaced by an extension

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

0. EHDSServiceRequest
Definition | The model covers details about a requested service or services. One order may include several requests.
Short | Service request model
Logical Model | Instances of this logical model are not marked to be the target of a Reference
2. EHDSServiceRequest.description
Definition | Textual description of the requested service
Short | Textual description of the requested service
Control | 0..1
Type | string
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
4. EHDSServiceRequest.code
Definition | A code and name that identifies a particular service (i.e., procedure, diagnostic investigation, or panel of investigations) that have been requested.
Short | A code and name that identifies a particular service (i.e., procedure, diagnostic investigation, or panel of investigations) that have been requested.
Control | 0..1
Binding | LOINC, NPU, SNOMED CT
Type | CodeableConcept
6. EHDSServiceRequest.quantity
Definition | Amount of requested services of the same type
Short | Amount of requested services of the same type
Control | 0..1
Type | Quantity
8. EHDSServiceRequest.bodySite
Definition | Anatomic location and laterality where the procedure should be performed. This is the target site.
Short | Anatomic location and laterality where the procedure should be performed. This is the target site.
Control | 0..*
Type | http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSBodyStructure
10. EHDSServiceRequest.reason[x]
Definition | Reason why this service is being requested.
Short | Reason why this service is being requested.
Control | 0..*
Binding | ICD-10, SNOMED CT, Orphacode
Type | Choice of: http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSObservation, http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSCondition, http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSMedication, 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
12. EHDSServiceRequest.priority
Definition | Indicates how quickly the request should be addressed with respect to other requests.
Short | Indicates how quickly the request should be addressed with respect to other requests.
Control | 0..1
Binding | HL7 Request Priority
Type | CodeableConcept
14. EHDSServiceRequest.supportingInformation[x]
Definition | Health conditions relevant for the results interpretation, e.g. fasting status, sex for clinical use, etc.
Short | Health conditions relevant for the results interpretation, e.g. fasting status, sex for clinical use, etc.
Control | 0..*
Type | Choice of: http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSObservation, http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSCondition, http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSProcedure, http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSMedicationAdministration
[x] Note | SeeChoice of Data Typesfor further information about how to use [x]
16. EHDSServiceRequest.specimen
Definition | Specimens to be used by the laboratory procedure
Short | Specimens to be used by the laboratory procedure
Control | 0..*
Type | http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSSpecimen
18. EHDSServiceRequest.encounter
Definition | The encounter that provides additional information about the healthcare context in which this request is made.
Short | The encounter that provides additional information about the healthcare context in which this request is made.
Control | 0..1
Type | http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSEncounter
20. EHDSServiceRequest.occurrence[x]
Definition | Expected time of the service
Short | Expected time of the service
Control | 0..1
Type | Choice of: dateTime, Period
[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
22. EHDSServiceRequest.patientInstructions
Definition | Patient or consumer-oriented instructions
Short | Patient or consumer-oriented instructions
Control | 0..1
Type | string
Primitive Value | This primitive element may be present, or absent, or replaced by an extension

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

0. EHDSServiceRequest
Definition | The model covers details about a requested service or services. One order may include several requests.
Short | Service request model
Control | 0..*
Is Modifier | false
Logical Model | Instances of this logical model are not marked to be the target of a Reference
2. EHDSServiceRequest.header
Definition | Basic metadata for this information
Short | Basic metadata for this information
Control | 1..1
Type | Base
4. EHDSServiceRequest.header.subject
Definition | Patient/subject information
Short | Patient/subject information
Control | 1..1
Type | http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSPatient
6. EHDSServiceRequest.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. EHDSServiceRequest.header.author[x]
Definition | Author(s) responsible for the provided information. The exact role of the responsible author varies across use cases and is specific to individual models.
Short | Author(s) responsible for the provided information.
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. EHDSServiceRequest.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. EHDSServiceRequest.header.status
Definition | Status of the resource or document
Short | Status of the resource or document
Control | 1..1
Type | CodeableConcept
14. EHDSServiceRequest.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. EHDSServiceRequest.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. EHDSServiceRequest.description
Definition | Textual description of the requested service
Short | Textual description of the requested service
Control | 0..1
Type | string
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
20. EHDSServiceRequest.code
Definition | A code and name that identifies a particular service (i.e., procedure, diagnostic investigation, or panel of investigations) that have been requested.
Short | A code and name that identifies a particular service (i.e., procedure, diagnostic investigation, or panel of investigations) that have been requested.
Control | 0..1
Binding | LOINC, NPU, SNOMED CT
Type | CodeableConcept
22. EHDSServiceRequest.quantity
Definition | Amount of requested services of the same type
Short | Amount of requested services of the same type
Control | 0..1
Type | Quantity
24. EHDSServiceRequest.bodySite
Definition | Anatomic location and laterality where the procedure should be performed. This is the target site.
Short | Anatomic location and laterality where the procedure should be performed. This is the target site.
Control | 0..*
Type | http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSBodyStructure
26. EHDSServiceRequest.reason[x]
Definition | Reason why this service is being requested.
Short | Reason why this service is being requested.
Control | 0..*
Binding | ICD-10, SNOMED CT, Orphacode
Type | Choice of: http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSObservation, http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSCondition, http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSMedication, 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
28. EHDSServiceRequest.priority
Definition | Indicates how quickly the request should be addressed with respect to other requests.
Short | Indicates how quickly the request should be addressed with respect to other requests.
Control | 0..1
Binding | HL7 Request Priority
Type | CodeableConcept
30. EHDSServiceRequest.supportingInformation[x]
Definition | Health conditions relevant for the results interpretation, e.g. fasting status, sex for clinical use, etc.
Short | Health conditions relevant for the results interpretation, e.g. fasting status, sex for clinical use, etc.
Control | 0..*
Type | Choice of: http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSObservation, http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSCondition, http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSProcedure, http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSMedicationAdministration
[x] Note | SeeChoice of Data Typesfor further information about how to use [x]
32. EHDSServiceRequest.specimen
Definition | Specimens to be used by the laboratory procedure
Short | Specimens to be used by the laboratory procedure
Control | 0..*
Type | http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSSpecimen
34. EHDSServiceRequest.encounter
Definition | The encounter that provides additional information about the healthcare context in which this request is made.
Short | The encounter that provides additional information about the healthcare context in which this request is made.
Control | 0..1
Type | http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSEncounter
36. EHDSServiceRequest.occurrence[x]
Definition | Expected time of the service
Short | Expected time of the service
Control | 0..1
Type | Choice of: dateTime, Period
[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
38. EHDSServiceRequest.patientInstructions
Definition | Patient or consumer-oriented instructions
Short | Patient or consumer-oriented instructions
Control | 0..1
Type | string
Primitive Value | This primitive element may be present, or absent, or replaced by an extension