This page is part of the FHIR Specification (v4.0.1: R4 - Mixed Normative and STU) in it's permanent home (it will always be available at this URL). The current version which supercedes this version is 5.0.0. For a full list of available versions, see the Directory of published versions . Page versions: R5 R4B R4
Modeling and Methodology Work Group | Maturity Level: N/A | Standards Status: Informative |
Raw XML (canonical form + also see XML Format Specification)
StructureDefinition for canonical
<?xml version="1.0" encoding="UTF-8"?> <StructureDefinition xmlns="http://hl7.org/fhir"> <id value="canonical"/> <text> <status value="generated"/> <div xmlns="http://www.w3.org/1999/xhtml">to do</div> </text> <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status"> <valueCode value="normative"/> </extension> <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-normative-version"> <valueCode value="4.0.0"/> </extension> <url value="http://hl7.org/fhir/StructureDefinition/canonical"/> <version value="4.0.1"/> <name value="canonical"/> <status value="active"/> <date value="2019-11-01T09:29:23+11:00"/> <publisher value="HL7 FHIR Standard"/> <contact> <telecom> <system value="url"/> <value value="http://hl7.org/fhir"/> </telecom> </contact> <description value="Base StructureDefinition for canonical type: A URI that is a reference to a canonical URL on a FHIR resource"/> <fhirVersion value="4.0.1"/> <kind value="primitive-type"/> <abstract value="false"/> <type value="canonical"/> <baseDefinition value="http://hl7.org/fhir/StructureDefinition/uri"/> <derivation value="specialization"/> <snapshot> <element id="canonical"> <path value="canonical"/> <short value="Primitive Type canonical"/> <definition value="A URI that is a reference to a canonical URL on a FHIR resource"/> <comment value="see [Canonical References](references.html#canonical)"/> <min value="0"/> <max value="*"/> <base> <path value="canonical"/> <min value="0"/> <max value="*"/> </base> <constraint> <key value="ele-1"/> <severity value="error"/> <human value="All FHIR elements must have a @value or children"/> <expression value="hasValue() or (children().count() > id.count())"/> <xpath value="@value|f:*|h:div"/> <source value="http://hl7.org/fhir/StructureDefinition/Element"/> </constraint> <isModifier value="false"/> <isSummary value="false"/> </element> <element id="canonical.id"> <path value="canonical.id"/> <representation value="xmlAttr"/> <short value="xml:id (or equivalent in JSON)"/> <definition value="unique id for the element within a resource (for internal references)"/> <min value="0"/> <max value="1"/> <base> <path value="Element.id"/> <min value="0"/> <max value="1"/> </base> <!-- Note: special primitive values have a FHIRPath system type. e.g. this is compiler magic (h) --> <type> <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type"> <valueUrl value="string"/> </extension> <code value="http://hl7.org/fhirpath/System.String"/> </type> <isModifier value="false"/> <isSummary value="false"/> </element> <element id="canonical.extension"> <path value="canonical.extension"/> <short value="Additional content defined by implementations"/> <definition value="May be used to represent additional information that is not part of the basic definition of the resource. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension."/> <comment value="There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone."/> <alias value="extensions"/> <alias value="user content"/> <min value="0"/> <max value="*"/> <base> <path value="Element.extension"/> <min value="0"/> <max value="*"/> </base> <type> <code value="Extension"/> </type> <constraint> <key value="ele-1"/> <severity value="error"/> <human value="All FHIR elements must have a @value or children"/> <expression value="hasValue() or (children().count() > id.count())"/> <xpath value="@value|f:*|h:div"/> <source value="http://hl7.org/fhir/StructureDefinition/Element"/> </constraint> <constraint> <key value="ext-1"/> <severity value="error"/> <human value="Must have either extensions or value[x], not both"/> <expression value="extension.exists() != value.exists()"/> <xpath value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])"/> <source value="http://hl7.org/fhir/StructureDefinition/Extension"/> </constraint> <isModifier value="false"/> <isSummary value="false"/> </element> <element id="canonical.value"> <path value="canonical.value"/> <representation value="xmlAttr"/> <short value="Primitive value for canonical"/> <definition value="Primitive value for canonical"/> <min value="0"/> <max value="1"/> <base> <path value="uri.value"/> <min value="0"/> <max value="1"/> </base> <!-- Note: special primitive values have a FHIRPath system type. e.g. this is compiler magic (i) --> <type> <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type"> <valueUrl value="string"/> </extension> <extension url="http://hl7.org/fhir/StructureDefinition/regex"> <valueString value="\S*"/> </extension> <code value="http://hl7.org/fhirpath/System.String"/> </type> <isModifier value="false"/> <isSummary value="false"/> </element> </snapshot> <differential> <element id="canonical"> <path value="canonical"/> <short value="Primitive Type canonical"/> <definition value="A URI that is a reference to a canonical URL on a FHIR resource"/> <comment value="see [Canonical References](references.html#canonical)"/> <min value="0"/> <max value="*"/> </element> <element id="canonical.value"> <path value="canonical.value"/> <representation value="xmlAttr"/> <short value="Primitive value for canonical"/> <definition value="Primitive value for canonical"/> <min value="0"/> <max value="1"/> <!-- Note: special primitive values have a FHIRPath system type. e.g. this is compiler magic (g) --> <type> <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type"> <valueUrl value="canonical"/> </extension> <extension url="http://hl7.org/fhir/StructureDefinition/regex"> <valueString value="\S*"/> </extension> <code value="http://hl7.org/fhirpath/System.String"/> </type> </element> </differential> </StructureDefinition>
Usage note: every effort has been made to ensure that the examples are correct and useful, but they are not a normative part of the specification.