0.1.0 - ci-build

RuCoreIG, published by HL7 FHIR Россия. This guide is not an authorized publication; it is the continuous build for version 0.1.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/fhir-ru/RuCoreIG/ and changes regularly. See the Directory of published versions

Resource Profile: Core Service Request (Заказ услуги)

Official URL: https://fhir.ru/ig/core/StructureDefinition/core-servicerequest Version: 0.1.0
Active as of 2024-09-01 Computable Name: Core_ServiceRequest

Заказ услуги

Профиль Core Service Request ресурса Service Request не содержит уточнений, связанных с заказом медицинских услуг в РФ. Предполагается, что ограничения и расширения будут вноситься в наследованных профилях. Согласно общему правилу, атрибуты типа Reference должны указывать на профили ресурсов Ru Core, при наличии. Здесь это атрибут subject в части указания на ресурс Patient.

//в профиле следует ослабить ограничение * subject only Reference(Core_Patient)

Usage:

Formal Views of Profile Content

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

NameFlagsCard.TypeDescription & Constraintsdoco
.. ServiceRequest C 0..* ServiceRequest A request for a service to be performed
prr-1: orderDetail SHALL only be present if code is present
... implicitRules ?!Σ 0..1 uri A set of rules under which this content was created
... modifierExtension ?! 0..* Extension Extensions that cannot be ignored
... status ?!Σ 1..1 code draft | active | on-hold | revoked | completed | entered-in-error | unknown
Binding: RequestStatus (required): The status of a service order.

... doNotPerform ?!Σ 0..1 boolean True if service/procedure should not be performed
... subject Σ 1..1 Reference(Core Patient (Пациент)) Пациент

doco Documentation for this format

Terminology Bindings

PathConformanceValueSetURI
ServiceRequest.statusrequiredRequestStatus
http://hl7.org/fhir/ValueSet/request-status|4.3.0
from the FHIR Standard
ServiceRequest.intentrequiredRequestIntent
http://hl7.org/fhir/ValueSet/request-intent|4.3.0
from the FHIR Standard

Constraints

IdGradePath(s)DetailsRequirements
dom-2errorServiceRequestIf the resource is contained in another resource, it SHALL NOT contain nested Resources
: contained.contained.empty()
dom-3errorServiceRequestIf the resource is contained in another resource, it SHALL be referred to from elsewhere in the resource or SHALL refer to the containing resource
: contained.where(((id.exists() and ('#'+id in (%resource.descendants().reference | %resource.descendants().as(canonical) | %resource.descendants().as(uri) | %resource.descendants().as(url)))) or descendants().where(reference = '#').exists() or descendants().where(as(canonical) = '#').exists() or descendants().where(as(uri) = '#').exists()).not()).trace('unmatched', id).empty()
dom-4errorServiceRequestIf a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated
: contained.meta.versionId.empty() and contained.meta.lastUpdated.empty()
dom-5errorServiceRequestIf a resource is contained in another resource, it SHALL NOT have a security label
: contained.meta.security.empty()
dom-6best practiceServiceRequestA resource should have narrative for robust management
: text.`div`.exists()
ele-1error**ALL** elementsAll FHIR elements must have a @value or children
: hasValue() or (children().count() > id.count())
ext-1error**ALL** extensionsMust have either extensions or value[x], not both
: extension.exists() != value.exists()
prr-1errorServiceRequestorderDetail SHALL only be present if code is present
: orderDetail.empty() or code.exists()
NameFlagsCard.TypeDescription & Constraintsdoco
.. ServiceRequest C 0..* ServiceRequest A request for a service to be performed
prr-1: orderDetail SHALL only be present if code is present
... id Σ 0..1 id Logical id of this artifact
... meta Σ 0..1 Meta Metadata about the resource
... implicitRules ?!Σ 0..1 uri A set of rules under which this content was created
... language 0..1 code Language of the resource content
Binding: CommonLanguages (preferred): IETF language tag

Additional BindingsPurpose
AllLanguages Max Binding
... text 0..1 Narrative Text summary of the resource, for human interpretation
... contained 0..* Resource Contained, inline Resources
dom-r4b: Containing new R4B resources within R4 resources may cause interoperability issues if instances are shared with R4 systems
... extension 0..* Extension Additional content defined by implementations
... modifierExtension ?! 0..* Extension Extensions that cannot be ignored
... identifier Σ 0..* Identifier Identifiers assigned to this order
... instantiatesCanonical Σ 0..* canonical(ActivityDefinition | PlanDefinition) Instantiates FHIR protocol or definition
... instantiatesUri Σ 0..* uri Instantiates external protocol or definition
... basedOn Σ 0..* Reference(CarePlan | ServiceRequest | MedicationRequest) What request fulfills
... replaces Σ 0..* Reference(ServiceRequest) What request replaces
... requisition Σ 0..1 Identifier Composite Request ID
... status ?!Σ 1..1 code draft | active | on-hold | revoked | completed | entered-in-error | unknown
Binding: RequestStatus (required): The status of a service order.

... intent ?!Σ 1..1 code proposal | plan | directive | order | original-order | reflex-order | filler-order | instance-order | option
Binding: RequestIntent (required): The kind of service request.

... category Σ 0..* CodeableConcept Classification of service
Binding: ServiceRequestCategoryCodes (example): Classification of the requested service.


... priority Σ 0..1 code routine | urgent | asap | stat
Binding: RequestPriority (required): Identifies the level of importance to be assigned to actioning the request.

... doNotPerform ?!Σ 0..1 boolean True if service/procedure should not be performed
... code Σ 0..1 CodeableConcept What is being requested/ordered
Binding: ProcedureCodes(SNOMEDCT) (example): Codes for tests or services that can be carried out by a designated individual, organization or healthcare service. For laboratory, LOINC is preferred and a valueset using LOINC Order codes is available.

... orderDetail ΣC 0..* CodeableConcept Additional order information
Binding: ServiceRequestOrderDetailsCodes (example): Codified order entry details which are based on order context.


... quantity[x] Σ 0..1 Service amount
.... quantityQuantity Quantity
.... quantityRatio Ratio
.... quantityRange Range
... subject Σ 1..1 Reference(Core Patient (Пациент)) Пациент
... encounter Σ 0..1 Reference(Encounter) Encounter in which the request was created
... occurrence[x] Σ 0..1 When service should occur
.... occurrenceDateTime dateTime
.... occurrencePeriod Period
.... occurrenceTiming Timing
... asNeeded[x] Σ 0..1 Preconditions for service
Binding: SNOMEDCTMedicationAsNeededReasonCodes (example): A coded concept identifying the pre-condition that should hold prior to performing a procedure. For example "pain", "on flare-up", etc.

.... asNeededBoolean boolean
.... asNeededCodeableConcept CodeableConcept
... authoredOn Σ 0..1 dateTime Date request signed
... requester Σ 0..1 Reference(Practitioner | PractitionerRole | Organization | Patient | RelatedPerson | Device) Who/what is requesting service
... performerType Σ 0..1 CodeableConcept Performer role
Binding: Action Participant Role (example): Indicates specific responsibility of an individual within the care team, such as "Primary physician", "Team coordinator", "Caregiver", etc.

... performer Σ 0..* Reference(Practitioner | PractitionerRole | Organization | CareTeam | HealthcareService | Patient | Device | RelatedPerson) Requested performer
... locationCode Σ 0..* CodeableConcept Requested location
Binding: ServiceDeliveryLocationRoleType (example): A location type where services are delivered.


... locationReference Σ 0..* Reference(Location) Requested location
... reasonCode Σ 0..* CodeableConcept Explanation/Justification for procedure or service
Binding: ProcedureReasonCodes (example): SNOMED CT Condition/Problem/Diagnosis Codes


... reasonReference Σ 0..* Reference(Condition | Observation | DiagnosticReport | DocumentReference) Explanation/Justification for service or service
... insurance 0..* Reference(Coverage | ClaimResponse) Associated insurance coverage
... supportingInfo 0..* Reference(Resource) Additional clinical information
... specimen Σ 0..* Reference(Specimen) Procedure Samples
... bodySite Σ 0..* CodeableConcept Location on Body
Binding: SNOMEDCTBodyStructures (example): SNOMED CT Body site concepts


... note 0..* Annotation Comments
... patientInstruction Σ 0..1 string Patient or consumer-oriented instructions
... relevantHistory 0..* Reference(Provenance) Request provenance

doco Documentation for this format

Terminology Bindings

PathConformanceValueSetURI
ServiceRequest.languagepreferredCommonLanguages
Additional Bindings Purpose
AllLanguages Max Binding
http://hl7.org/fhir/ValueSet/languages
from the FHIR Standard
ServiceRequest.statusrequiredRequestStatus
http://hl7.org/fhir/ValueSet/request-status|4.3.0
from the FHIR Standard
ServiceRequest.intentrequiredRequestIntent
http://hl7.org/fhir/ValueSet/request-intent|4.3.0
from the FHIR Standard
ServiceRequest.categoryexampleServiceRequestCategoryCodes
http://hl7.org/fhir/ValueSet/servicerequest-category
from the FHIR Standard
ServiceRequest.priorityrequiredRequestPriority
http://hl7.org/fhir/ValueSet/request-priority|4.3.0
from the FHIR Standard
ServiceRequest.codeexampleProcedureCodes(SNOMEDCT)
http://hl7.org/fhir/ValueSet/procedure-code
from the FHIR Standard
ServiceRequest.orderDetailexampleServiceRequestOrderDetailsCodes
http://hl7.org/fhir/ValueSet/servicerequest-orderdetail
from the FHIR Standard
ServiceRequest.asNeeded[x]exampleSNOMEDCTMedicationAsNeededReasonCodes
http://hl7.org/fhir/ValueSet/medication-as-needed-reason
from the FHIR Standard
ServiceRequest.performerTypeexampleActionParticipantRole
http://terminology.hl7.org/ValueSet/action-participant-role
ServiceRequest.locationCodeexampleServiceDeliveryLocationRoleType
http://terminology.hl7.org/ValueSet/v3-ServiceDeliveryLocationRoleType
ServiceRequest.reasonCodeexampleProcedureReasonCodes
http://hl7.org/fhir/ValueSet/procedure-reason
from the FHIR Standard
ServiceRequest.bodySiteexampleSNOMEDCTBodyStructures
http://hl7.org/fhir/ValueSet/body-site
from the FHIR Standard

Constraints

IdGradePath(s)DetailsRequirements
dom-2errorServiceRequestIf the resource is contained in another resource, it SHALL NOT contain nested Resources
: contained.contained.empty()
dom-3errorServiceRequestIf the resource is contained in another resource, it SHALL be referred to from elsewhere in the resource or SHALL refer to the containing resource
: contained.where(((id.exists() and ('#'+id in (%resource.descendants().reference | %resource.descendants().as(canonical) | %resource.descendants().as(uri) | %resource.descendants().as(url)))) or descendants().where(reference = '#').exists() or descendants().where(as(canonical) = '#').exists() or descendants().where(as(uri) = '#').exists()).not()).trace('unmatched', id).empty()
dom-4errorServiceRequestIf a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated
: contained.meta.versionId.empty() and contained.meta.lastUpdated.empty()
dom-5errorServiceRequestIf a resource is contained in another resource, it SHALL NOT have a security label
: contained.meta.security.empty()
dom-6best practiceServiceRequestA resource should have narrative for robust management
: text.`div`.exists()
dom-r4bwarningServiceRequest.containedContaining new R4B resources within R4 resources may cause interoperability issues if instances are shared with R4 systems
: ($this is Citation or $this is Evidence or $this is EvidenceReport or $this is EvidenceVariable or $this is MedicinalProductDefinition or $this is PackagedProductDefinition or $this is AdministrableProductDefinition or $this is Ingredient or $this is ClinicalUseDefinition or $this is RegulatedAuthorization or $this is SubstanceDefinition or $this is SubscriptionStatus or $this is SubscriptionTopic) implies (%resource is Citation or %resource is Evidence or %resource is EvidenceReport or %resource is EvidenceVariable or %resource is MedicinalProductDefinition or %resource is PackagedProductDefinition or %resource is AdministrableProductDefinition or %resource is Ingredient or %resource is ClinicalUseDefinition or %resource is RegulatedAuthorization or %resource is SubstanceDefinition or %resource is SubscriptionStatus or %resource is SubscriptionTopic)
ele-1error**ALL** elementsAll FHIR elements must have a @value or children
: hasValue() or (children().count() > id.count())
ext-1error**ALL** extensionsMust have either extensions or value[x], not both
: extension.exists() != value.exists()
prr-1errorServiceRequestorderDetail SHALL only be present if code is present
: orderDetail.empty() or code.exists()

This structure is derived from ServiceRequest

Summary

Structures

This structure refers to these other structures:

Differential View

This structure is derived from ServiceRequest

Key Elements View

NameFlagsCard.TypeDescription & Constraintsdoco
.. ServiceRequest C 0..* ServiceRequest A request for a service to be performed
prr-1: orderDetail SHALL only be present if code is present
... implicitRules ?!Σ 0..1 uri A set of rules under which this content was created
... modifierExtension ?! 0..* Extension Extensions that cannot be ignored
... status ?!Σ 1..1 code draft | active | on-hold | revoked | completed | entered-in-error | unknown
Binding: RequestStatus (required): The status of a service order.

... doNotPerform ?!Σ 0..1 boolean True if service/procedure should not be performed
... subject Σ 1..1 Reference(Core Patient (Пациент)) Пациент

doco Documentation for this format

Terminology Bindings

PathConformanceValueSetURI
ServiceRequest.statusrequiredRequestStatus
http://hl7.org/fhir/ValueSet/request-status|4.3.0
from the FHIR Standard
ServiceRequest.intentrequiredRequestIntent
http://hl7.org/fhir/ValueSet/request-intent|4.3.0
from the FHIR Standard

Constraints

IdGradePath(s)DetailsRequirements
dom-2errorServiceRequestIf the resource is contained in another resource, it SHALL NOT contain nested Resources
: contained.contained.empty()
dom-3errorServiceRequestIf the resource is contained in another resource, it SHALL be referred to from elsewhere in the resource or SHALL refer to the containing resource
: contained.where(((id.exists() and ('#'+id in (%resource.descendants().reference | %resource.descendants().as(canonical) | %resource.descendants().as(uri) | %resource.descendants().as(url)))) or descendants().where(reference = '#').exists() or descendants().where(as(canonical) = '#').exists() or descendants().where(as(uri) = '#').exists()).not()).trace('unmatched', id).empty()
dom-4errorServiceRequestIf a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated
: contained.meta.versionId.empty() and contained.meta.lastUpdated.empty()
dom-5errorServiceRequestIf a resource is contained in another resource, it SHALL NOT have a security label
: contained.meta.security.empty()
dom-6best practiceServiceRequestA resource should have narrative for robust management
: text.`div`.exists()
ele-1error**ALL** elementsAll FHIR elements must have a @value or children
: hasValue() or (children().count() > id.count())
ext-1error**ALL** extensionsMust have either extensions or value[x], not both
: extension.exists() != value.exists()
prr-1errorServiceRequestorderDetail SHALL only be present if code is present
: orderDetail.empty() or code.exists()

Snapshot View

NameFlagsCard.TypeDescription & Constraintsdoco
.. ServiceRequest C 0..* ServiceRequest A request for a service to be performed
prr-1: orderDetail SHALL only be present if code is present
... id Σ 0..1 id Logical id of this artifact
... meta Σ 0..1 Meta Metadata about the resource
... implicitRules ?!Σ 0..1 uri A set of rules under which this content was created
... language 0..1 code Language of the resource content
Binding: CommonLanguages (preferred): IETF language tag

Additional BindingsPurpose
AllLanguages Max Binding
... text 0..1 Narrative Text summary of the resource, for human interpretation
... contained 0..* Resource Contained, inline Resources
dom-r4b: Containing new R4B resources within R4 resources may cause interoperability issues if instances are shared with R4 systems
... extension 0..* Extension Additional content defined by implementations
... modifierExtension ?! 0..* Extension Extensions that cannot be ignored
... identifier Σ 0..* Identifier Identifiers assigned to this order
... instantiatesCanonical Σ 0..* canonical(ActivityDefinition | PlanDefinition) Instantiates FHIR protocol or definition
... instantiatesUri Σ 0..* uri Instantiates external protocol or definition
... basedOn Σ 0..* Reference(CarePlan | ServiceRequest | MedicationRequest) What request fulfills
... replaces Σ 0..* Reference(ServiceRequest) What request replaces
... requisition Σ 0..1 Identifier Composite Request ID
... status ?!Σ 1..1 code draft | active | on-hold | revoked | completed | entered-in-error | unknown
Binding: RequestStatus (required): The status of a service order.

... intent ?!Σ 1..1 code proposal | plan | directive | order | original-order | reflex-order | filler-order | instance-order | option
Binding: RequestIntent (required): The kind of service request.

... category Σ 0..* CodeableConcept Classification of service
Binding: ServiceRequestCategoryCodes (example): Classification of the requested service.


... priority Σ 0..1 code routine | urgent | asap | stat
Binding: RequestPriority (required): Identifies the level of importance to be assigned to actioning the request.

... doNotPerform ?!Σ 0..1 boolean True if service/procedure should not be performed
... code Σ 0..1 CodeableConcept What is being requested/ordered
Binding: ProcedureCodes(SNOMEDCT) (example): Codes for tests or services that can be carried out by a designated individual, organization or healthcare service. For laboratory, LOINC is preferred and a valueset using LOINC Order codes is available.

... orderDetail ΣC 0..* CodeableConcept Additional order information
Binding: ServiceRequestOrderDetailsCodes (example): Codified order entry details which are based on order context.


... quantity[x] Σ 0..1 Service amount
.... quantityQuantity Quantity
.... quantityRatio Ratio
.... quantityRange Range
... subject Σ 1..1 Reference(Core Patient (Пациент)) Пациент
... encounter Σ 0..1 Reference(Encounter) Encounter in which the request was created
... occurrence[x] Σ 0..1 When service should occur
.... occurrenceDateTime dateTime
.... occurrencePeriod Period
.... occurrenceTiming Timing
... asNeeded[x] Σ 0..1 Preconditions for service
Binding: SNOMEDCTMedicationAsNeededReasonCodes (example): A coded concept identifying the pre-condition that should hold prior to performing a procedure. For example "pain", "on flare-up", etc.

.... asNeededBoolean boolean
.... asNeededCodeableConcept CodeableConcept
... authoredOn Σ 0..1 dateTime Date request signed
... requester Σ 0..1 Reference(Practitioner | PractitionerRole | Organization | Patient | RelatedPerson | Device) Who/what is requesting service
... performerType Σ 0..1 CodeableConcept Performer role
Binding: Action Participant Role (example): Indicates specific responsibility of an individual within the care team, such as "Primary physician", "Team coordinator", "Caregiver", etc.

... performer Σ 0..* Reference(Practitioner | PractitionerRole | Organization | CareTeam | HealthcareService | Patient | Device | RelatedPerson) Requested performer
... locationCode Σ 0..* CodeableConcept Requested location
Binding: ServiceDeliveryLocationRoleType (example): A location type where services are delivered.


... locationReference Σ 0..* Reference(Location) Requested location
... reasonCode Σ 0..* CodeableConcept Explanation/Justification for procedure or service
Binding: ProcedureReasonCodes (example): SNOMED CT Condition/Problem/Diagnosis Codes


... reasonReference Σ 0..* Reference(Condition | Observation | DiagnosticReport | DocumentReference) Explanation/Justification for service or service
... insurance 0..* Reference(Coverage | ClaimResponse) Associated insurance coverage
... supportingInfo 0..* Reference(Resource) Additional clinical information
... specimen Σ 0..* Reference(Specimen) Procedure Samples
... bodySite Σ 0..* CodeableConcept Location on Body
Binding: SNOMEDCTBodyStructures (example): SNOMED CT Body site concepts


... note 0..* Annotation Comments
... patientInstruction Σ 0..1 string Patient or consumer-oriented instructions
... relevantHistory 0..* Reference(Provenance) Request provenance

doco Documentation for this format

Terminology Bindings

PathConformanceValueSetURI
ServiceRequest.languagepreferredCommonLanguages
Additional Bindings Purpose
AllLanguages Max Binding
http://hl7.org/fhir/ValueSet/languages
from the FHIR Standard
ServiceRequest.statusrequiredRequestStatus
http://hl7.org/fhir/ValueSet/request-status|4.3.0
from the FHIR Standard
ServiceRequest.intentrequiredRequestIntent
http://hl7.org/fhir/ValueSet/request-intent|4.3.0
from the FHIR Standard
ServiceRequest.categoryexampleServiceRequestCategoryCodes
http://hl7.org/fhir/ValueSet/servicerequest-category
from the FHIR Standard
ServiceRequest.priorityrequiredRequestPriority
http://hl7.org/fhir/ValueSet/request-priority|4.3.0
from the FHIR Standard
ServiceRequest.codeexampleProcedureCodes(SNOMEDCT)
http://hl7.org/fhir/ValueSet/procedure-code
from the FHIR Standard
ServiceRequest.orderDetailexampleServiceRequestOrderDetailsCodes
http://hl7.org/fhir/ValueSet/servicerequest-orderdetail
from the FHIR Standard
ServiceRequest.asNeeded[x]exampleSNOMEDCTMedicationAsNeededReasonCodes
http://hl7.org/fhir/ValueSet/medication-as-needed-reason
from the FHIR Standard
ServiceRequest.performerTypeexampleActionParticipantRole
http://terminology.hl7.org/ValueSet/action-participant-role
ServiceRequest.locationCodeexampleServiceDeliveryLocationRoleType
http://terminology.hl7.org/ValueSet/v3-ServiceDeliveryLocationRoleType
ServiceRequest.reasonCodeexampleProcedureReasonCodes
http://hl7.org/fhir/ValueSet/procedure-reason
from the FHIR Standard
ServiceRequest.bodySiteexampleSNOMEDCTBodyStructures
http://hl7.org/fhir/ValueSet/body-site
from the FHIR Standard

Constraints

IdGradePath(s)DetailsRequirements
dom-2errorServiceRequestIf the resource is contained in another resource, it SHALL NOT contain nested Resources
: contained.contained.empty()
dom-3errorServiceRequestIf the resource is contained in another resource, it SHALL be referred to from elsewhere in the resource or SHALL refer to the containing resource
: contained.where(((id.exists() and ('#'+id in (%resource.descendants().reference | %resource.descendants().as(canonical) | %resource.descendants().as(uri) | %resource.descendants().as(url)))) or descendants().where(reference = '#').exists() or descendants().where(as(canonical) = '#').exists() or descendants().where(as(uri) = '#').exists()).not()).trace('unmatched', id).empty()
dom-4errorServiceRequestIf a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated
: contained.meta.versionId.empty() and contained.meta.lastUpdated.empty()
dom-5errorServiceRequestIf a resource is contained in another resource, it SHALL NOT have a security label
: contained.meta.security.empty()
dom-6best practiceServiceRequestA resource should have narrative for robust management
: text.`div`.exists()
dom-r4bwarningServiceRequest.containedContaining new R4B resources within R4 resources may cause interoperability issues if instances are shared with R4 systems
: ($this is Citation or $this is Evidence or $this is EvidenceReport or $this is EvidenceVariable or $this is MedicinalProductDefinition or $this is PackagedProductDefinition or $this is AdministrableProductDefinition or $this is Ingredient or $this is ClinicalUseDefinition or $this is RegulatedAuthorization or $this is SubstanceDefinition or $this is SubscriptionStatus or $this is SubscriptionTopic) implies (%resource is Citation or %resource is Evidence or %resource is EvidenceReport or %resource is EvidenceVariable or %resource is MedicinalProductDefinition or %resource is PackagedProductDefinition or %resource is AdministrableProductDefinition or %resource is Ingredient or %resource is ClinicalUseDefinition or %resource is RegulatedAuthorization or %resource is SubstanceDefinition or %resource is SubscriptionStatus or %resource is SubscriptionTopic)
ele-1error**ALL** elementsAll FHIR elements must have a @value or children
: hasValue() or (children().count() > id.count())
ext-1error**ALL** extensionsMust have either extensions or value[x], not both
: extension.exists() != value.exists()
prr-1errorServiceRequestorderDetail SHALL only be present if code is present
: orderDetail.empty() or code.exists()

This structure is derived from ServiceRequest

Summary

Structures

This structure refers to these other structures:

 

Other representations of profile: CSV, Excel, Schematron