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/ and changes regularly. See the Directory of published versions

## Logical Model: EHDSServiceRequest - Detailed Descriptions

Draft as of 2026-02-05

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 | EHDS refined base model for Specification of requested service or services 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.serviceText
Definition | Textual description of the requested service
Short | Service text
Control | 0..1
Type | string
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
20. EHDSServiceRequest.serviceCode
Definition | A code that identifies a particular service (i.e., procedure, diagnostic investigation, or panel of investigations) that have been requested.
Short | Service code
Control | 0..1
Binding | LOINC, NPU, SNOMED CT
Type | CodeableConcept
22. EHDSServiceRequest.reasonCode
Definition | Health conditions affecting the health of the patient and are important to be known for a health professional during a health encounter. Clinical conditions of the subject relevant for the results interpretation.
Short | Reason code
Control | 0..*
Binding | ICD-10 (ICD-11 when available), SNOMED CT, Orphacode
Type | CodeableConcept
24. EHDSServiceRequest.quantity
Definition | Amount of requested services of the same type
Short | Quantity
Control | 0..1
Type | Quantity
26. EHDSServiceRequest.bodySite
Definition | Anatomic location and laterality where the procedure should be performed. This is the target site.
Short | Anatomic location
Control | 0..*
Type | http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSBodyStructure
28. EHDSServiceRequest.reasonReference[x]
Definition | Indicates another resource that provides a justification for why this service is being requested.
Short | Reason reference
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/EHDSMedication
[x] Note | SeeChoice of Data Typesfor further information about how to use [x]
30. EHDSServiceRequest.priority
Definition | Indicates how quickly the ServiceRequest should be addressed with respect to other requests.
Short | Priority
Control | 0..1
Binding | HL7 Request priority
Type | CodeableConcept
32. EHDSServiceRequest.supportingInformation[x]
Definition | Health conditions relevant for the results interpretation, e.g. fasting status, sex for clinical use, etc.
Short | Supporting information
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]
34. EHDSServiceRequest.specimen
Definition | Specimens to be used by the laboratory procedure
Short | Specimen
Control | 0..*
Type | http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSSpecimen
36. EHDSServiceRequest.encounter
Definition | An encounter that provides additional information about the healthcare context in which this request is made.
Short | Encounter
Control | 0..1
Type | http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSEncounter
38. EHDSServiceRequest.occurrence[x]
Definition | When service should occur
Short | Occurrence
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
40. EHDSServiceRequest.patientInstructions
Definition | Patient or consumer-oriented instructions
Short | Patient 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 | EHDS refined base model for Specification of requested service or services
Short | Service request model
Logical Model | Instances of this logical model are not marked to be the target of a Reference
2. EHDSServiceRequest.serviceText
Definition | Textual description of the requested service
Short | Service text
Control | 0..1
Type | string
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
4. EHDSServiceRequest.serviceCode
Definition | A code that identifies a particular service (i.e., procedure, diagnostic investigation, or panel of investigations) that have been requested.
Short | Service code
Control | 0..1
Binding | LOINC, NPU, SNOMED CT
Type | CodeableConcept
6. EHDSServiceRequest.reasonCode
Definition | Health conditions affecting the health of the patient and are important to be known for a health professional during a health encounter. Clinical conditions of the subject relevant for the results interpretation.
Short | Reason code
Control | 0..*
Binding | ICD-10 (ICD-11 when available), SNOMED CT, Orphacode
Type | CodeableConcept
8. EHDSServiceRequest.quantity
Definition | Amount of requested services of the same type
Short | Quantity
Control | 0..1
Type | Quantity
10. EHDSServiceRequest.bodySite
Definition | Anatomic location and laterality where the procedure should be performed. This is the target site.
Short | Anatomic location
Control | 0..*
Type | http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSBodyStructure
12. EHDSServiceRequest.reasonReference[x]
Definition | Indicates another resource that provides a justification for why this service is being requested.
Short | Reason reference
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/EHDSMedication
[x] Note | SeeChoice of Data Typesfor further information about how to use [x]
14. EHDSServiceRequest.priority
Definition | Indicates how quickly the ServiceRequest should be addressed with respect to other requests.
Short | Priority
Control | 0..1
Binding | HL7 Request priority
Type | CodeableConcept
16. EHDSServiceRequest.supportingInformation[x]
Definition | Health conditions relevant for the results interpretation, e.g. fasting status, sex for clinical use, etc.
Short | Supporting information
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]
18. EHDSServiceRequest.specimen
Definition | Specimens to be used by the laboratory procedure
Short | Specimen
Control | 0..*
Type | http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSSpecimen
20. EHDSServiceRequest.encounter
Definition | An encounter that provides additional information about the healthcare context in which this request is made.
Short | Encounter
Control | 0..1
Type | http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSEncounter
22. EHDSServiceRequest.occurrence[x]
Definition | When service should occur
Short | Occurrence
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
24. EHDSServiceRequest.patientInstructions
Definition | Patient or consumer-oriented instructions
Short | Patient 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 | EHDS refined base model for Specification of requested service or services
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.serviceText
Definition | Textual description of the requested service
Short | Service text
Control | 0..1
Type | string
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
20. EHDSServiceRequest.serviceCode
Definition | A code that identifies a particular service (i.e., procedure, diagnostic investigation, or panel of investigations) that have been requested.
Short | Service code
Control | 0..1
Binding | LOINC, NPU, SNOMED CT
Type | CodeableConcept
22. EHDSServiceRequest.reasonCode
Definition | Health conditions affecting the health of the patient and are important to be known for a health professional during a health encounter. Clinical conditions of the subject relevant for the results interpretation.
Short | Reason code
Control | 0..*
Binding | ICD-10 (ICD-11 when available), SNOMED CT, Orphacode
Type | CodeableConcept
24. EHDSServiceRequest.quantity
Definition | Amount of requested services of the same type
Short | Quantity
Control | 0..1
Type | Quantity
26. EHDSServiceRequest.bodySite
Definition | Anatomic location and laterality where the procedure should be performed. This is the target site.
Short | Anatomic location
Control | 0..*
Type | http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSBodyStructure
28. EHDSServiceRequest.reasonReference[x]
Definition | Indicates another resource that provides a justification for why this service is being requested.
Short | Reason reference
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/EHDSMedication
[x] Note | SeeChoice of Data Typesfor further information about how to use [x]
30. EHDSServiceRequest.priority
Definition | Indicates how quickly the ServiceRequest should be addressed with respect to other requests.
Short | Priority
Control | 0..1
Binding | HL7 Request priority
Type | CodeableConcept
32. EHDSServiceRequest.supportingInformation[x]
Definition | Health conditions relevant for the results interpretation, e.g. fasting status, sex for clinical use, etc.
Short | Supporting information
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]
34. EHDSServiceRequest.specimen
Definition | Specimens to be used by the laboratory procedure
Short | Specimen
Control | 0..*
Type | http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSSpecimen
36. EHDSServiceRequest.encounter
Definition | An encounter that provides additional information about the healthcare context in which this request is made.
Short | Encounter
Control | 0..1
Type | http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSEncounter
38. EHDSServiceRequest.occurrence[x]
Definition | When service should occur
Short | Occurrence
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
40. EHDSServiceRequest.patientInstructions
Definition | Patient or consumer-oriented instructions
Short | Patient instructions
Control | 0..1
Type | string
Primitive Value | This primitive element may be present, or absent, or replaced by an extension