HL7 PT FHIR Implementation Guide: Example IG Release 1 | STU1
1.0.0 - STU1
HL7 PT FHIR Implementation Guide: Example IG Release 1 | STU1
1.0.0 - STU1
HL7 PT FHIR Implementation Guide: Example IG Release 1 | STU1, published by HL7 Portugal. This guide is not an authorized publication; it is the continuous build for version 1.0.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/hl7-pt/resp-ig/ and changes regularly. See the Directory of published versions
| Official URL: http://example.com/fhir/example/StructureDefinition/inspirers-medicationAdministration | Version: 1.0.0 | |||
| Active as of 2024-09-24 | Computable Name: InspirersMedicationAdministration | |||
Defines constraints and extensions on the MedicationAdministration resource for the minimal set of data to query and retrieve patient MedicationAdministration.
Usage:
Description of Profiles, Differentials, Snapshots and how the different presentations work.
This structure is derived from MedicationAdministration
| Name | Flags | Card. | Type | Description & Constraints |
|---|---|---|---|---|
  MedicationAdministration |
0..* | MedicationAdministration | Administration of medication to a patient | |
  subject |
S | 1..1 | Reference(Patient | Group) | Who received medication |
| Documentation for this format | ||||
| Name | Flags | Card. | Type | Description & Constraints |
|---|---|---|---|---|
| MedicationAdministration |
0..* | MedicationAdministration | Administration of medication to a patient | |
  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 | in-progress | not-done | on-hold | completed | entered-in-error | stopped | unknown Binding: MedicationAdministration Status Codes (required): A set of codes indicating the current status of a MedicationAdministration. |
  medication[x] |
Σ | 1..1 | What was administered Binding: SNOMEDCTMedicationCodes (example): Codes identifying substance or product that can be administered. | |
  medicationCodeableConcept |
CodeableConcept | |||
 medicationReference |
Reference(Medication) | |||
| subject |
SΣ | 1..1 | Reference(Patient | Group) | Who received medication |
 effective[x] |
Σ | 1..1 | Start and end time of administration | |
 effectiveDateTime |
dateTime | |||
| effectivePeriod |
Period | |||
| Documentation for this format | ||||
| Path | Conformance | ValueSet | URI |
| MedicationAdministration.status | required | MedicationAdministration Status Codeshttp://hl7.org/fhir/ValueSet/medication-admin-status|4.0.1from the FHIR Standard | |
| MedicationAdministration.medication[x] | example | SNOMEDCTMedicationCodeshttp://hl7.org/fhir/ValueSet/medication-codesfrom the FHIR Standard |
| Id | Grade | Path(s) | Details | Requirements |
| dom-2 | error | MedicationAdministration | If the resource is contained in another resource, it SHALL NOT contain nested Resources : contained.contained.empty() | |
| dom-3 | error | MedicationAdministration | If 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 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(canonical) = '#').exists()).not()).trace('unmatched', id).empty() | |
| dom-4 | error | MedicationAdministration | If 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-5 | error | MedicationAdministration | If a resource is contained in another resource, it SHALL NOT have a security label : contained.meta.security.empty() | |
| dom-6 | best practice | MedicationAdministration | A resource should have narrative for robust management : text.`div`.exists() | |
| ele-1 | error | **ALL** elements | All FHIR elements must have a @value or children : hasValue() or (children().count() > id.count()) | |
| ext-1 | error | **ALL** extensions | Must have either extensions or value[x], not both : extension.exists() != value.exists() |
| Name | Flags | Card. | Type | Description & Constraints | ||||
|---|---|---|---|---|---|---|---|---|
| MedicationAdministration |
0..* | MedicationAdministration | Administration of medication to a patient | |||||
| 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): A human language.
| |||||
| text |
0..1 | Narrative | Text summary of the resource, for human interpretation | |||||
| contained |
0..* | Resource | Contained, inline Resources | |||||
 extension |
0..* | Extension | Additional content defined by implementations | |||||
| modifierExtension |
?! | 0..* | Extension | Extensions that cannot be ignored | ||||
| identifier |
0..* | Identifier | External identifier | |||||
| instantiates |
Σ | 0..* | uri | Instantiates protocol or definition | ||||
| partOf |
Σ | 0..* | Reference(MedicationAdministration | Procedure) | Part of referenced event | ||||
| status |
?!Σ | 1..1 | code | in-progress | not-done | on-hold | completed | entered-in-error | stopped | unknown Binding: MedicationAdministration Status Codes (required): A set of codes indicating the current status of a MedicationAdministration. | ||||
| statusReason |
0..* | CodeableConcept | Reason administration not performed Binding: SNOMEDCTReasonMedicationNotGivenCodes (example): A set of codes indicating the reason why the MedicationAdministration is negated. | |||||
| category |
0..1 | CodeableConcept | Type of medication usage Binding: MedicationAdministration Category Codes (preferred): A coded concept describing where the medication administered is expected to occur. | |||||
| medication[x] |
Σ | 1..1 | What was administered Binding: SNOMEDCTMedicationCodes (example): Codes identifying substance or product that can be administered. | |||||
| medicationCodeableConcept |
CodeableConcept | |||||||
| medicationReference |
Reference(Medication) | |||||||
| subject |
SΣ | 1..1 | Reference(Patient | Group) | Who received medication | ||||
| context |
0..1 | Reference(Encounter | EpisodeOfCare) | Encounter or Episode of Care administered as part of | |||||
| supportingInformation |
0..* | Reference(Resource) | Additional information to support administration | |||||
| effective[x] |
Σ | 1..1 | Start and end time of administration | |||||
| effectiveDateTime |
dateTime | |||||||
| effectivePeriod |
Period | |||||||
| performer |
Σ | 0..* | BackboneElement | Who performed the medication administration and what they did | ||||
| id |
0..1 | string | Unique id for inter-element referencing | |||||
| extension |
0..* | Extension | Additional content defined by implementations | |||||
| modifierExtension |
?!Σ | 0..* | Extension | Extensions that cannot be ignored even if unrecognized | ||||
| function |
0..1 | CodeableConcept | Type of performance Binding: MedicationAdministration Performer Function Codes (example): A code describing the role an individual played in administering the medication. | |||||
| actor |
Σ | 1..1 | Reference(Practitioner | PractitionerRole | Patient | RelatedPerson | Device) | Who performed the medication administration | ||||
| reasonCode |
0..* | CodeableConcept | Reason administration performed Binding: ReasonMedicationGivenCodes (example): A set of codes indicating the reason why the MedicationAdministration was made. | |||||
| reasonReference |
0..* | Reference(Condition | Observation | DiagnosticReport) | Condition or observation that supports why the medication was administered | |||||
| request |
0..1 | Reference(MedicationRequest) | Request administration performed against | |||||
| device |
0..* | Reference(Device) | Device used to administer | |||||
| note |
0..* | Annotation | Information about the administration | |||||
| dosage |
C | 0..1 | BackboneElement | Details of how medication was taken mad-1: SHALL have at least one of dosage.dose or dosage.rate[x] | ||||
| id |
0..1 | string | Unique id for inter-element referencing | |||||
| extension |
0..* | Extension | Additional content defined by implementations | |||||
| modifierExtension |
?!Σ | 0..* | Extension | Extensions that cannot be ignored even if unrecognized | ||||
| text |
0..1 | string | Free text dosage instructions e.g. SIG | |||||
| site |
0..1 | CodeableConcept | Body site administered to Binding: SNOMEDCTAnatomicalStructureForAdministrationSiteCodes (example): A coded concept describing the site location the medicine enters into or onto the body. | |||||
| route |
0..1 | CodeableConcept | Path of substance into body Binding: SNOMEDCTRouteCodes (example): A coded concept describing the route or physiological path of administration of a therapeutic agent into or onto the body of a subject. | |||||
| method |
0..1 | CodeableConcept | How drug was administered Binding: SNOMEDCTAdministrationMethodCodes (example): A coded concept describing the technique by which the medicine is administered. | |||||
| dose |
0..1 | SimpleQuantity | Amount of medication per dose | |||||
| rate[x] |
0..1 | Dose quantity per unit of time | ||||||
| rateRatio |
Ratio | |||||||
| rateQuantity |
Quantity(SimpleQuantity) | |||||||
| eventHistory |
0..* | Reference(Provenance) | A list of events of interest in the lifecycle | |||||
| Documentation for this format | ||||||||
| Path | Conformance | ValueSet | URI | |||
| MedicationAdministration.language | preferred | CommonLanguages
http://hl7.org/fhir/ValueSet/languagesfrom the FHIR Standard | ||||
| MedicationAdministration.status | required | MedicationAdministration Status Codeshttp://hl7.org/fhir/ValueSet/medication-admin-status|4.0.1from the FHIR Standard | ||||
| MedicationAdministration.statusReason | example | SNOMEDCTReasonMedicationNotGivenCodeshttp://hl7.org/fhir/ValueSet/reason-medication-not-given-codesfrom the FHIR Standard | ||||
| MedicationAdministration.category | preferred | MedicationAdministration Category Codeshttp://hl7.org/fhir/ValueSet/medication-admin-categoryfrom the FHIR Standard | ||||
| MedicationAdministration.medication[x] | example | SNOMEDCTMedicationCodeshttp://hl7.org/fhir/ValueSet/medication-codesfrom the FHIR Standard | ||||
| MedicationAdministration.performer.function | example | MedicationAdministration Performer Function Codeshttp://hl7.org/fhir/ValueSet/med-admin-perform-functionfrom the FHIR Standard | ||||
| MedicationAdministration.reasonCode | example | ReasonMedicationGivenCodeshttp://hl7.org/fhir/ValueSet/reason-medication-given-codesfrom the FHIR Standard | ||||
| MedicationAdministration.dosage.site | example | SNOMEDCTAnatomicalStructureForAdministrationSiteCodeshttp://hl7.org/fhir/ValueSet/approach-site-codesfrom the FHIR Standard | ||||
| MedicationAdministration.dosage.route | example | SNOMEDCTRouteCodeshttp://hl7.org/fhir/ValueSet/route-codesfrom the FHIR Standard | ||||
| MedicationAdministration.dosage.method | example | SNOMEDCTAdministrationMethodCodeshttp://hl7.org/fhir/ValueSet/administration-method-codesfrom the FHIR Standard |
| Id | Grade | Path(s) | Details | Requirements |
| dom-2 | error | MedicationAdministration | If the resource is contained in another resource, it SHALL NOT contain nested Resources : contained.contained.empty() | |
| dom-3 | error | MedicationAdministration | If 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 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(canonical) = '#').exists()).not()).trace('unmatched', id).empty() | |
| dom-4 | error | MedicationAdministration | If 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-5 | error | MedicationAdministration | If a resource is contained in another resource, it SHALL NOT have a security label : contained.meta.security.empty() | |
| dom-6 | best practice | MedicationAdministration | A resource should have narrative for robust management : text.`div`.exists() | |
| ele-1 | error | **ALL** elements | All FHIR elements must have a @value or children : hasValue() or (children().count() > id.count()) | |
| ext-1 | error | **ALL** extensions | Must have either extensions or value[x], not both : extension.exists() != value.exists() | |
| mad-1 | error | MedicationAdministration.dosage | SHALL have at least one of dosage.dose or dosage.rate[x] : dose.exists() or rate.exists() |
This structure is derived from MedicationAdministration
Differential View
This structure is derived from MedicationAdministration
| Name | Flags | Card. | Type | Description & Constraints |
|---|---|---|---|---|
| MedicationAdministration |
0..* | MedicationAdministration | Administration of medication to a patient | |
| subject |
S | 1..1 | Reference(Patient | Group) | Who received medication |
| Documentation for this format | ||||
Key Elements View
| Name | Flags | Card. | Type | Description & Constraints |
|---|---|---|---|---|
| MedicationAdministration |
0..* | MedicationAdministration | Administration of medication to a patient | |
| 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 | in-progress | not-done | on-hold | completed | entered-in-error | stopped | unknown Binding: MedicationAdministration Status Codes (required): A set of codes indicating the current status of a MedicationAdministration. |
| medication[x] |
Σ | 1..1 | What was administered Binding: SNOMEDCTMedicationCodes (example): Codes identifying substance or product that can be administered. | |
| medicationCodeableConcept |
CodeableConcept | |||
| medicationReference |
Reference(Medication) | |||
| subject |
SΣ | 1..1 | Reference(Patient | Group) | Who received medication |
| effective[x] |
Σ | 1..1 | Start and end time of administration | |
| effectiveDateTime |
dateTime | |||
| effectivePeriod |
Period | |||
| Documentation for this format | ||||
| Path | Conformance | ValueSet | URI |
| MedicationAdministration.status | required | MedicationAdministration Status Codeshttp://hl7.org/fhir/ValueSet/medication-admin-status|4.0.1from the FHIR Standard | |
| MedicationAdministration.medication[x] | example | SNOMEDCTMedicationCodeshttp://hl7.org/fhir/ValueSet/medication-codesfrom the FHIR Standard |
| Id | Grade | Path(s) | Details | Requirements |
| dom-2 | error | MedicationAdministration | If the resource is contained in another resource, it SHALL NOT contain nested Resources : contained.contained.empty() | |
| dom-3 | error | MedicationAdministration | If 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 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(canonical) = '#').exists()).not()).trace('unmatched', id).empty() | |
| dom-4 | error | MedicationAdministration | If 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-5 | error | MedicationAdministration | If a resource is contained in another resource, it SHALL NOT have a security label : contained.meta.security.empty() | |
| dom-6 | best practice | MedicationAdministration | A resource should have narrative for robust management : text.`div`.exists() | |
| ele-1 | error | **ALL** elements | All FHIR elements must have a @value or children : hasValue() or (children().count() > id.count()) | |
| ext-1 | error | **ALL** extensions | Must have either extensions or value[x], not both : extension.exists() != value.exists() |
Snapshot View
| Name | Flags | Card. | Type | Description & Constraints | ||||
|---|---|---|---|---|---|---|---|---|
| MedicationAdministration |
0..* | MedicationAdministration | Administration of medication to a patient | |||||
| 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): A human language.
| |||||
| text |
0..1 | Narrative | Text summary of the resource, for human interpretation | |||||
| contained |
0..* | Resource | Contained, inline Resources | |||||
| extension |
0..* | Extension | Additional content defined by implementations | |||||
| modifierExtension |
?! | 0..* | Extension | Extensions that cannot be ignored | ||||
| identifier |
0..* | Identifier | External identifier | |||||
| instantiates |
Σ | 0..* | uri | Instantiates protocol or definition | ||||
| partOf |
Σ | 0..* | Reference(MedicationAdministration | Procedure) | Part of referenced event | ||||
| status |
?!Σ | 1..1 | code | in-progress | not-done | on-hold | completed | entered-in-error | stopped | unknown Binding: MedicationAdministration Status Codes (required): A set of codes indicating the current status of a MedicationAdministration. | ||||
| statusReason |
0..* | CodeableConcept | Reason administration not performed Binding: SNOMEDCTReasonMedicationNotGivenCodes (example): A set of codes indicating the reason why the MedicationAdministration is negated. | |||||
| category |
0..1 | CodeableConcept | Type of medication usage Binding: MedicationAdministration Category Codes (preferred): A coded concept describing where the medication administered is expected to occur. | |||||
| medication[x] |
Σ | 1..1 | What was administered Binding: SNOMEDCTMedicationCodes (example): Codes identifying substance or product that can be administered. | |||||
| medicationCodeableConcept |
CodeableConcept | |||||||
| medicationReference |
Reference(Medication) | |||||||
| subject |
SΣ | 1..1 | Reference(Patient | Group) | Who received medication | ||||
| context |
0..1 | Reference(Encounter | EpisodeOfCare) | Encounter or Episode of Care administered as part of | |||||
| supportingInformation |
0..* | Reference(Resource) | Additional information to support administration | |||||
| effective[x] |
Σ | 1..1 | Start and end time of administration | |||||
| effectiveDateTime |
dateTime | |||||||
| effectivePeriod |
Period | |||||||
| performer |
Σ | 0..* | BackboneElement | Who performed the medication administration and what they did | ||||
| id |
0..1 | string | Unique id for inter-element referencing | |||||
| extension |
0..* | Extension | Additional content defined by implementations | |||||
| modifierExtension |
?!Σ | 0..* | Extension | Extensions that cannot be ignored even if unrecognized | ||||
| function |
0..1 | CodeableConcept | Type of performance Binding: MedicationAdministration Performer Function Codes (example): A code describing the role an individual played in administering the medication. | |||||
| actor |
Σ | 1..1 | Reference(Practitioner | PractitionerRole | Patient | RelatedPerson | Device) | Who performed the medication administration | ||||
| reasonCode |
0..* | CodeableConcept | Reason administration performed Binding: ReasonMedicationGivenCodes (example): A set of codes indicating the reason why the MedicationAdministration was made. | |||||
| reasonReference |
0..* | Reference(Condition | Observation | DiagnosticReport) | Condition or observation that supports why the medication was administered | |||||
| request |
0..1 | Reference(MedicationRequest) | Request administration performed against | |||||
| device |
0..* | Reference(Device) | Device used to administer | |||||
| note |
0..* | Annotation | Information about the administration | |||||
| dosage |
C | 0..1 | BackboneElement | Details of how medication was taken mad-1: SHALL have at least one of dosage.dose or dosage.rate[x] | ||||
| id |
0..1 | string | Unique id for inter-element referencing | |||||
| extension |
0..* | Extension | Additional content defined by implementations | |||||
| modifierExtension |
?!Σ | 0..* | Extension | Extensions that cannot be ignored even if unrecognized | ||||
| text |
0..1 | string | Free text dosage instructions e.g. SIG | |||||
| site |
0..1 | CodeableConcept | Body site administered to Binding: SNOMEDCTAnatomicalStructureForAdministrationSiteCodes (example): A coded concept describing the site location the medicine enters into or onto the body. | |||||
| route |
0..1 | CodeableConcept | Path of substance into body Binding: SNOMEDCTRouteCodes (example): A coded concept describing the route or physiological path of administration of a therapeutic agent into or onto the body of a subject. | |||||
| method |
0..1 | CodeableConcept | How drug was administered Binding: SNOMEDCTAdministrationMethodCodes (example): A coded concept describing the technique by which the medicine is administered. | |||||
| dose |
0..1 | SimpleQuantity | Amount of medication per dose | |||||
| rate[x] |
0..1 | Dose quantity per unit of time | ||||||
| rateRatio |
Ratio | |||||||
| rateQuantity |
Quantity(SimpleQuantity) | |||||||
| eventHistory |
0..* | Reference(Provenance) | A list of events of interest in the lifecycle | |||||
| Documentation for this format | ||||||||
| Path | Conformance | ValueSet | URI | |||
| MedicationAdministration.language | preferred | CommonLanguages
http://hl7.org/fhir/ValueSet/languagesfrom the FHIR Standard | ||||
| MedicationAdministration.status | required | MedicationAdministration Status Codeshttp://hl7.org/fhir/ValueSet/medication-admin-status|4.0.1from the FHIR Standard | ||||
| MedicationAdministration.statusReason | example | SNOMEDCTReasonMedicationNotGivenCodeshttp://hl7.org/fhir/ValueSet/reason-medication-not-given-codesfrom the FHIR Standard | ||||
| MedicationAdministration.category | preferred | MedicationAdministration Category Codeshttp://hl7.org/fhir/ValueSet/medication-admin-categoryfrom the FHIR Standard | ||||
| MedicationAdministration.medication[x] | example | SNOMEDCTMedicationCodeshttp://hl7.org/fhir/ValueSet/medication-codesfrom the FHIR Standard | ||||
| MedicationAdministration.performer.function | example | MedicationAdministration Performer Function Codeshttp://hl7.org/fhir/ValueSet/med-admin-perform-functionfrom the FHIR Standard | ||||
| MedicationAdministration.reasonCode | example | ReasonMedicationGivenCodeshttp://hl7.org/fhir/ValueSet/reason-medication-given-codesfrom the FHIR Standard | ||||
| MedicationAdministration.dosage.site | example | SNOMEDCTAnatomicalStructureForAdministrationSiteCodeshttp://hl7.org/fhir/ValueSet/approach-site-codesfrom the FHIR Standard | ||||
| MedicationAdministration.dosage.route | example | SNOMEDCTRouteCodeshttp://hl7.org/fhir/ValueSet/route-codesfrom the FHIR Standard | ||||
| MedicationAdministration.dosage.method | example | SNOMEDCTAdministrationMethodCodeshttp://hl7.org/fhir/ValueSet/administration-method-codesfrom the FHIR Standard |
| Id | Grade | Path(s) | Details | Requirements |
| dom-2 | error | MedicationAdministration | If the resource is contained in another resource, it SHALL NOT contain nested Resources : contained.contained.empty() | |
| dom-3 | error | MedicationAdministration | If 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 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(canonical) = '#').exists()).not()).trace('unmatched', id).empty() | |
| dom-4 | error | MedicationAdministration | If 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-5 | error | MedicationAdministration | If a resource is contained in another resource, it SHALL NOT have a security label : contained.meta.security.empty() | |
| dom-6 | best practice | MedicationAdministration | A resource should have narrative for robust management : text.`div`.exists() | |
| ele-1 | error | **ALL** elements | All FHIR elements must have a @value or children : hasValue() or (children().count() > id.count()) | |
| ext-1 | error | **ALL** extensions | Must have either extensions or value[x], not both : extension.exists() != value.exists() | |
| mad-1 | error | MedicationAdministration.dosage | SHALL have at least one of dosage.dose or dosage.rate[x] : dose.exists() or rate.exists() |
This structure is derived from MedicationAdministration
Other representations of profile: CSV, Excel, Schematron