Release 5 Ballot

This page is part of the FHIR Specification (v5.0.0-ballot: R5 Ballot - see ballot notes). 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

Example StructureDefinition/Expression (Turtle)

Modeling and Methodology Work GroupMaturity Level: N/AStandards Status: Informative

Raw Turtle (+ also see Turtle/RDF Format Specification)

StructureDefinition for Expression

@prefix fhir: <http://hl7.org/fhir/> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .

# - resource -------------------------------------------------------------------

[] a fhir:StructureDefinition;
  fhir:Resource.id [ fhir:value "Expression"];
  fhir:DomainResource.text [
     fhir:Narrative.status [ fhir:value "generated" ]
  ];
  fhir:DomainResource.extension [
     fhir:Extension.url [ fhir:value "http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status" ];
     fhir:Extension.value [ fhir:value "trial-use" ]
  ];
  fhir:CanonicalResource.url [ fhir:value "http://hl7.org/fhir/StructureDefinition/Expression"];
  fhir:CanonicalResource.version [ fhir:value "5.0.0-ballot"];
  fhir:CanonicalResource.name [ fhir:value "Expression"];
  fhir:CanonicalResource.status [ fhir:value "draft"];
  fhir:CanonicalResource.experimental [ fhir:value "false"];
  fhir:CanonicalResource.date [ fhir:value "2022-09-10T04:52:37+10:00"];
  fhir:CanonicalResource.publisher [ fhir:value "HL7 FHIR Standard"];
  fhir:CanonicalResource.contact [
     fhir:ContactDetail.telecom [
       fhir:ContactPoint.system [ fhir:value "url" ];
       fhir:ContactPoint.value [ fhir:value "http://hl7.org/fhir" ]
     ]
  ];
  fhir:CanonicalResource.description [ fhir:value "Expression Type: A expression that is evaluated in a specified context and returns a value. The context of use of the expression must specify the context in which the expression is evaluated, and how the result of the expression is used."];
  fhir:StructureDefinition.url [ fhir:value "http://hl7.org/fhir/StructureDefinition/Expression"];
  fhir:StructureDefinition.version [ fhir:value "5.0.0-ballot"];
  fhir:StructureDefinition.name [ fhir:value "Expression"];
  fhir:StructureDefinition.status [ fhir:value "draft"];
  fhir:StructureDefinition.experimental [ fhir:value "false"];
  fhir:StructureDefinition.date [ fhir:value "2022-09-10T04:52:37+10:00"];
  fhir:StructureDefinition.publisher [ fhir:value "HL7 FHIR Standard"];
  fhir:StructureDefinition.contact [
     fhir:ContactDetail.telecom [
       fhir:ContactPoint.system [ fhir:value "url" ];
       fhir:ContactPoint.value [ fhir:value "http://hl7.org/fhir" ]
     ]
  ];
  fhir:StructureDefinition.description [ fhir:value "Expression Type: A expression that is evaluated in a specified context and returns a value. The context of use of the expression must specify the context in which the expression is evaluated, and how the result of the expression is used."];
  fhir:StructureDefinition.fhirVersion [ fhir:value "5.0.0-ballot"];
  fhir:StructureDefinition.mapping [
     fhir:StructureDefinitionMappingComponent.identity [ fhir:value "rim" ];
     fhir:StructureDefinitionMappingComponent.uri [ fhir:value "http://hl7.org/v3" ];
     fhir:StructureDefinitionMappingComponent.name [ fhir:value "RIM Mapping" ]
  ];
  fhir:StructureDefinition.kind [ fhir:value "complex-type"];
  fhir:StructureDefinition.abstract [ fhir:value "false"];
  fhir:StructureDefinition.type [ fhir:value "Expression"];
  fhir:StructureDefinition.baseDefinition [ fhir:value "http://hl7.org/fhir/StructureDefinition/DataType"];
  fhir:StructureDefinition.derivation [ fhir:value "specialization"];
  fhir:StructureDefinition.snapshot [
     fhir:StructureDefinitionSnapshotComponent.element [
       fhir:Element.id [ fhir:value "Expression" ];
       fhir:Element.extension [
         fhir:Extension.url [ fhir:value "http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status" ];
         fhir:Extension.value [ fhir:value "trial-use" ]
       ];
       fhir:ElementDefinition.path [ fhir:value "Expression" ];
       fhir:ElementDefinition.short [ fhir:value "An expression that can be used to generate a value" ];
       fhir:ElementDefinition.definition [ fhir:value "A expression that is evaluated in a specified context and returns a value. The context of use of the expression must specify the context in which the expression is evaluated, and how the result of the expression is used." ];
       fhir:ElementDefinition.min [ fhir:value "0" ];
       fhir:ElementDefinition.max [ fhir:value "*" ];
       fhir:ElementDefinition.base [
         fhir:ElementDefinitionBaseComponent.path [ fhir:value "Expression" ];
         fhir:ElementDefinitionBaseComponent.min [ fhir:value "0" ];
         fhir:ElementDefinitionBaseComponent.max [ fhir:value "*" ]
       ];
       fhir:ElementDefinition.constraint [
         fhir:ElementDefinitionConstraintComponent.key [ fhir:value "ele-1" ];
         fhir:ElementDefinitionConstraintComponent.severity [ fhir:value "error" ];
         fhir:ElementDefinitionConstraintComponent.human [ fhir:value "All FHIR elements must have a @value or children" ];
         fhir:ElementDefinitionConstraintComponent.expression [ fhir:value "hasValue() or (children().count() > id.count())" ];
         fhir:ElementDefinitionConstraintComponent.xpath [ fhir:value "@value|f:*|h:div" ];
         fhir:ElementDefinitionConstraintComponent.source [ fhir:value "http://hl7.org/fhir/StructureDefinition/Element" ]
       ], [
         fhir:ElementDefinitionConstraintComponent.key [ fhir:value "exp-1" ];
         fhir:ElementDefinitionConstraintComponent.severity [ fhir:value "error" ];
         fhir:ElementDefinitionConstraintComponent.human [ fhir:value "An expression or a reference must be provided" ];
         fhir:ElementDefinitionConstraintComponent.expression [ fhir:value "expression.exists() or reference.exists()" ];
         fhir:ElementDefinitionConstraintComponent.xpath [ fhir:value "exists(f:expression) or exists(f:reference)" ];
         fhir:ElementDefinitionConstraintComponent.source [ fhir:value "http://hl7.org/fhir/StructureDefinition/Expression" ]
       ];
       fhir:ElementDefinition.isModifier [ fhir:value "false" ];
       fhir:ElementDefinition.mapping [
         fhir:ElementDefinitionMappingComponent.identity [ fhir:value "rim" ];
         fhir:ElementDefinitionMappingComponent.map [ fhir:value "n/a" ]
       ]
     ], [
       fhir:Element.id [ fhir:value "Expression.id" ];
       fhir:ElementDefinition.path [ fhir:value "Expression.id" ];
       fhir:ElementDefinition.representation [ fhir:value "xmlAttr" ];
       fhir:ElementDefinition.short [ fhir:value "Unique id for inter-element referencing" ];
       fhir:ElementDefinition.definition [ fhir:value "Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces." ];
       fhir:ElementDefinition.min [ fhir:value "0" ];
       fhir:ElementDefinition.max [ fhir:value "1" ];
       fhir:ElementDefinition.base [
         fhir:ElementDefinitionBaseComponent.path [ fhir:value "Element.id" ];
         fhir:ElementDefinitionBaseComponent.min [ fhir:value "0" ];
         fhir:ElementDefinitionBaseComponent.max [ fhir:value "1" ]
       ];
       fhir:ElementDefinition.type [
         fhir:Element.extension [
           fhir:Extension.url [ fhir:value "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type" ];
           fhir:Extension.value [ fhir:value "id" ]
         ];
         fhir:TypeRefComponent.code [ fhir:value "http://hl7.org/fhirpath/System.String" ]
       ];
       fhir:ElementDefinition.isModifier [ fhir:value "false" ];
       fhir:ElementDefinition.isSummary [ fhir:value "false" ];
       fhir:ElementDefinition.mapping [
         fhir:ElementDefinitionMappingComponent.identity [ fhir:value "rim" ];
         fhir:ElementDefinitionMappingComponent.map [ fhir:value "n/a" ]
       ]
     ], [
       fhir:Element.id [ fhir:value "Expression.extension" ];
       fhir:ElementDefinition.path [ fhir:value "Expression.extension" ];
       fhir:ElementDefinition.slicing [
         fhir:ElementDefinitionSlicingComponent.discriminator [
           fhir:ElementDefinitionSlicingDiscriminatorComponent.type [ fhir:value "value" ];
           fhir:ElementDefinitionSlicingDiscriminatorComponent.path [ fhir:value "url" ]
         ];
         fhir:ElementDefinitionSlicingComponent.description [ fhir:value "Extensions are always sliced by (at least) url" ];
         fhir:ElementDefinitionSlicingComponent.rules [ fhir:value "open" ]
       ];
       fhir:ElementDefinition.short [ fhir:value "Additional content defined by implementations" ];
       fhir:ElementDefinition.definition [ fhir:value "May be used to represent additional information that is not part of the basic definition of the element. 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." ];
       fhir:ElementDefinition.comment [ fhir: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." ];
       fhir:ElementDefinition.alias [ fhir:value "extensions" ], [ fhir:value "user content" ];
       fhir:ElementDefinition.min [ fhir:value "0" ];
       fhir:ElementDefinition.max [ fhir:value "*" ];
       fhir:ElementDefinition.base [
         fhir:ElementDefinitionBaseComponent.path [ fhir:value "Element.extension" ];
         fhir:ElementDefinitionBaseComponent.min [ fhir:value "0" ];
         fhir:ElementDefinitionBaseComponent.max [ fhir:value "*" ]
       ];
       fhir:ElementDefinition.type [
         fhir:TypeRefComponent.code [ fhir:value "Extension" ]
       ];
       fhir:ElementDefinition.constraint [
         fhir:ElementDefinitionConstraintComponent.key [ fhir:value "ele-1" ];
         fhir:ElementDefinitionConstraintComponent.severity [ fhir:value "error" ];
         fhir:ElementDefinitionConstraintComponent.human [ fhir:value "All FHIR elements must have a @value or children" ];
         fhir:ElementDefinitionConstraintComponent.expression [ fhir:value "hasValue() or (children().count() > id.count())" ];
         fhir:ElementDefinitionConstraintComponent.xpath [ fhir:value "@value|f:*|h:div" ];
         fhir:ElementDefinitionConstraintComponent.source [ fhir:value "http://hl7.org/fhir/StructureDefinition/Element" ]
       ], [
         fhir:ElementDefinitionConstraintComponent.key [ fhir:value "ext-1" ];
         fhir:ElementDefinitionConstraintComponent.severity [ fhir:value "error" ];
         fhir:ElementDefinitionConstraintComponent.human [ fhir:value "Must have either extensions or value[x], not both" ];
         fhir:ElementDefinitionConstraintComponent.expression [ fhir:value "extension.exists() != value.exists()" ];
         fhir:ElementDefinitionConstraintComponent.xpath [ fhir:value "exists(f:extension)!=exists(f:*[starts-with(local-name(.), \"value\")])" ];
         fhir:ElementDefinitionConstraintComponent.source [ fhir:value "http://hl7.org/fhir/StructureDefinition/Extension" ]
       ];
       fhir:ElementDefinition.isModifier [ fhir:value "false" ];
       fhir:ElementDefinition.isSummary [ fhir:value "false" ];
       fhir:ElementDefinition.mapping [
         fhir:ElementDefinitionMappingComponent.identity [ fhir:value "rim" ];
         fhir:ElementDefinitionMappingComponent.map [ fhir:value "n/a" ]
       ]
     ], [
       fhir:Element.id [ fhir:value "Expression.description" ];
       fhir:ElementDefinition.path [ fhir:value "Expression.description" ];
       fhir:ElementDefinition.short [ fhir:value "Natural language description of the condition" ];
       fhir:ElementDefinition.definition [ fhir:value "A brief, natural language description of the condition that effectively communicates the intended semantics." ];
       fhir:ElementDefinition.min [ fhir:value "0" ];
       fhir:ElementDefinition.max [ fhir:value "1" ];
       fhir:ElementDefinition.base [
         fhir:ElementDefinitionBaseComponent.path [ fhir:value "Expression.description" ];
         fhir:ElementDefinitionBaseComponent.min [ fhir:value "0" ];
         fhir:ElementDefinitionBaseComponent.max [ fhir:value "1" ]
       ];
       fhir:ElementDefinition.type [
         fhir:TypeRefComponent.code [ fhir:value "string" ]
       ];
       fhir:ElementDefinition.constraint [
         fhir:ElementDefinitionConstraintComponent.key [ fhir:value "ele-1" ];
         fhir:ElementDefinitionConstraintComponent.severity [ fhir:value "error" ];
         fhir:ElementDefinitionConstraintComponent.human [ fhir:value "All FHIR elements must have a @value or children" ];
         fhir:ElementDefinitionConstraintComponent.expression [ fhir:value "hasValue() or (children().count() > id.count())" ];
         fhir:ElementDefinitionConstraintComponent.xpath [ fhir:value "@value|f:*|h:div" ];
         fhir:ElementDefinitionConstraintComponent.source [ fhir:value "http://hl7.org/fhir/StructureDefinition/Element" ]
       ];
       fhir:ElementDefinition.isModifier [ fhir:value "false" ];
       fhir:ElementDefinition.isSummary [ fhir:value "true" ]
     ], [
       fhir:Element.id [ fhir:value "Expression.name" ];
       fhir:ElementDefinition.path [ fhir:value "Expression.name" ];
       fhir:ElementDefinition.short [ fhir:value "Short name assigned to expression for reuse" ];
       fhir:ElementDefinition.definition [ fhir:value "A short name assigned to the expression to allow for multiple reuse of the expression in the context where it is defined." ];
       fhir:ElementDefinition.min [ fhir:value "0" ];
       fhir:ElementDefinition.max [ fhir:value "1" ];
       fhir:ElementDefinition.base [
         fhir:ElementDefinitionBaseComponent.path [ fhir:value "Expression.name" ];
         fhir:ElementDefinitionBaseComponent.min [ fhir:value "0" ];
         fhir:ElementDefinitionBaseComponent.max [ fhir:value "1" ]
       ];
       fhir:ElementDefinition.type [
         fhir:TypeRefComponent.code [ fhir:value "id" ]
       ];
       fhir:ElementDefinition.constraint [
         fhir:ElementDefinitionConstraintComponent.key [ fhir:value "ele-1" ];
         fhir:ElementDefinitionConstraintComponent.severity [ fhir:value "error" ];
         fhir:ElementDefinitionConstraintComponent.human [ fhir:value "All FHIR elements must have a @value or children" ];
         fhir:ElementDefinitionConstraintComponent.expression [ fhir:value "hasValue() or (children().count() > id.count())" ];
         fhir:ElementDefinitionConstraintComponent.xpath [ fhir:value "@value|f:*|h:div" ];
         fhir:ElementDefinitionConstraintComponent.source [ fhir:value "http://hl7.org/fhir/StructureDefinition/Element" ]
       ];
       fhir:ElementDefinition.isModifier [ fhir:value "false" ];
       fhir:ElementDefinition.isSummary [ fhir:value "true" ]
     ], [
       fhir:Element.id [ fhir:value "Expression.language" ];
       fhir:ElementDefinition.path [ fhir:value "Expression.language" ];
       fhir:ElementDefinition.short [ fhir:value "text/cql | text/fhirpath | application/x-fhir-query | etc." ];
       fhir:ElementDefinition.definition [ fhir:value "The media type of the language for the expression." ];
       fhir:ElementDefinition.requirements [ fhir:value "The cardinality of this element is optional to allow text only as part of the authoring process.  However, in order to be executable, the expression element must be specified." ];
       fhir:ElementDefinition.min [ fhir:value "0" ];
       fhir:ElementDefinition.max [ fhir:value "1" ];
       fhir:ElementDefinition.base [
         fhir:ElementDefinitionBaseComponent.path [ fhir:value "Expression.language" ];
         fhir:ElementDefinitionBaseComponent.min [ fhir:value "0" ];
         fhir:ElementDefinitionBaseComponent.max [ fhir:value "1" ]
       ];
       fhir:ElementDefinition.type [
         fhir:TypeRefComponent.code [ fhir:value "code" ]
       ];
       fhir:ElementDefinition.constraint [
         fhir:ElementDefinitionConstraintComponent.key [ fhir:value "ele-1" ];
         fhir:ElementDefinitionConstraintComponent.severity [ fhir:value "error" ];
         fhir:ElementDefinitionConstraintComponent.human [ fhir:value "All FHIR elements must have a @value or children" ];
         fhir:ElementDefinitionConstraintComponent.expression [ fhir:value "hasValue() or (children().count() > id.count())" ];
         fhir:ElementDefinitionConstraintComponent.xpath [ fhir:value "@value|f:*|h:div" ];
         fhir:ElementDefinitionConstraintComponent.source [ fhir:value "http://hl7.org/fhir/StructureDefinition/Element" ]
       ];
       fhir:ElementDefinition.isModifier [ fhir:value "false" ];
       fhir:ElementDefinition.isSummary [ fhir:value "true" ];
       fhir:ElementDefinition.binding [
         fhir:Element.extension [
           fhir:Extension.url [ fhir:value "http://hl7.org/fhir/build/StructureDefinition/binding-definition" ];
           fhir:Extension.value [ fhir:value "The media type of the expression language." ]
         ], [
           fhir:Extension.url [ fhir:value "http://hl7.org/fhir/StructureDefinition/elementdefinition-maxValueSet" ];
           fhir:Extension.value [ fhir:value "http://hl7.org/fhir/ValueSet/mimetypes" ]
         ], [
           fhir:Extension.url [ fhir:value "http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName" ];
           fhir:Extension.value [ fhir:value "ExpressionLanguage" ]
         ];
         fhir:ElementDefinitionBindingComponent.strength [ fhir:value "extensible" ];
         fhir:ElementDefinitionBindingComponent.valueSet [ fhir:value "http://hl7.org/fhir/ValueSet/expression-language" ]
       ]
     ], [
       fhir:Element.id [ fhir:value "Expression.expression" ];
       fhir:ElementDefinition.path [ fhir:value "Expression.expression" ];
       fhir:ElementDefinition.short [ fhir:value "Expression in specified language" ];
       fhir:ElementDefinition.definition [ fhir:value "An expression in the specified language that returns a value." ];
       fhir:ElementDefinition.comment [ fhir:value "If Expression.expression and Expression.reference are both present, the Expression.expression might just be a name pointing something within the referenced content." ];
       fhir:ElementDefinition.min [ fhir:value "0" ];
       fhir:ElementDefinition.max [ fhir:value "1" ];
       fhir:ElementDefinition.base [
         fhir:ElementDefinitionBaseComponent.path [ fhir:value "Expression.expression" ];
         fhir:ElementDefinitionBaseComponent.min [ fhir:value "0" ];
         fhir:ElementDefinitionBaseComponent.max [ fhir:value "1" ]
       ];
       fhir:ElementDefinition.type [
         fhir:TypeRefComponent.code [ fhir:value "string" ]
       ];
       fhir:ElementDefinition.constraint [
         fhir:ElementDefinitionConstraintComponent.key [ fhir:value "ele-1" ];
         fhir:ElementDefinitionConstraintComponent.severity [ fhir:value "error" ];
         fhir:ElementDefinitionConstraintComponent.human [ fhir:value "All FHIR elements must have a @value or children" ];
         fhir:ElementDefinitionConstraintComponent.expression [ fhir:value "hasValue() or (children().count() > id.count())" ];
         fhir:ElementDefinitionConstraintComponent.xpath [ fhir:value "@value|f:*|h:div" ];
         fhir:ElementDefinitionConstraintComponent.source [ fhir:value "http://hl7.org/fhir/StructureDefinition/Element" ]
       ];
       fhir:ElementDefinition.isModifier [ fhir:value "false" ];
       fhir:ElementDefinition.isSummary [ fhir:value "true" ]
     ], [
       fhir:Element.id [ fhir:value "Expression.reference" ];
       fhir:ElementDefinition.path [ fhir:value "Expression.reference" ];
       fhir:ElementDefinition.short [ fhir:value "Where the expression is found" ];
       fhir:ElementDefinition.definition [ fhir:value "A URI that defines where the expression is found." ];
       fhir:ElementDefinition.comment [ fhir:value "If both a reference and an expression is found, the reference SHALL point to the same expression." ];
       fhir:ElementDefinition.min [ fhir:value "0" ];
       fhir:ElementDefinition.max [ fhir:value "1" ];
       fhir:ElementDefinition.base [
         fhir:ElementDefinitionBaseComponent.path [ fhir:value "Expression.reference" ];
         fhir:ElementDefinitionBaseComponent.min [ fhir:value "0" ];
         fhir:ElementDefinitionBaseComponent.max [ fhir:value "1" ]
       ];
       fhir:ElementDefinition.type [
         fhir:TypeRefComponent.code [ fhir:value "uri" ]
       ];
       fhir:ElementDefinition.constraint [
         fhir:ElementDefinitionConstraintComponent.key [ fhir:value "ele-1" ];
         fhir:ElementDefinitionConstraintComponent.severity [ fhir:value "error" ];
         fhir:ElementDefinitionConstraintComponent.human [ fhir:value "All FHIR elements must have a @value or children" ];
         fhir:ElementDefinitionConstraintComponent.expression [ fhir:value "hasValue() or (children().count() > id.count())" ];
         fhir:ElementDefinitionConstraintComponent.xpath [ fhir:value "@value|f:*|h:div" ];
         fhir:ElementDefinitionConstraintComponent.source [ fhir:value "http://hl7.org/fhir/StructureDefinition/Element" ]
       ];
       fhir:ElementDefinition.isModifier [ fhir:value "false" ];
       fhir:ElementDefinition.isSummary [ fhir:value "true" ]
     ]
  ];
  fhir:StructureDefinition.differential [
     fhir:StructureDefinitionDifferentialComponent.element [
       fhir:Element.id [ fhir:value "Expression" ];
       fhir:Element.extension [
         fhir:Extension.url [ fhir:value "http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status" ];
         fhir:Extension.value [ fhir:value "trial-use" ]
       ];
       fhir:ElementDefinition.path [ fhir:value "Expression" ];
       fhir:ElementDefinition.short [ fhir:value "An expression that can be used to generate a value" ];
       fhir:ElementDefinition.definition [ fhir:value "A expression that is evaluated in a specified context and returns a value. The context of use of the expression must specify the context in which the expression is evaluated, and how the result of the expression is used." ];
       fhir:ElementDefinition.min [ fhir:value "0" ];
       fhir:ElementDefinition.max [ fhir:value "*" ];
       fhir:ElementDefinition.constraint [
         fhir:ElementDefinitionConstraintComponent.key [ fhir:value "exp-1" ];
         fhir:ElementDefinitionConstraintComponent.severity [ fhir:value "error" ];
         fhir:ElementDefinitionConstraintComponent.human [ fhir:value "An expression or a reference must be provided" ];
         fhir:ElementDefinitionConstraintComponent.expression [ fhir:value "expression.exists() or reference.exists()" ];
         fhir:ElementDefinitionConstraintComponent.xpath [ fhir:value "exists(f:expression) or exists(f:reference)" ];
         fhir:ElementDefinitionConstraintComponent.source [ fhir:value "http://hl7.org/fhir/StructureDefinition/Expression" ]
       ]
     ], [
       fhir:Element.id [ fhir:value "Expression.description" ];
       fhir:ElementDefinition.path [ fhir:value "Expression.description" ];
       fhir:ElementDefinition.short [ fhir:value "Natural language description of the condition" ];
       fhir:ElementDefinition.definition [ fhir:value "A brief, natural language description of the condition that effectively communicates the intended semantics." ];
       fhir:ElementDefinition.min [ fhir:value "0" ];
       fhir:ElementDefinition.max [ fhir:value "1" ];
       fhir:ElementDefinition.type [
         fhir:TypeRefComponent.code [ fhir:value "string" ]
       ];
       fhir:ElementDefinition.isSummary [ fhir:value "true" ]
     ], [
       fhir:Element.id [ fhir:value "Expression.name" ];
       fhir:ElementDefinition.path [ fhir:value "Expression.name" ];
       fhir:ElementDefinition.short [ fhir:value "Short name assigned to expression for reuse" ];
       fhir:ElementDefinition.definition [ fhir:value "A short name assigned to the expression to allow for multiple reuse of the expression in the context where it is defined." ];
       fhir:ElementDefinition.min [ fhir:value "0" ];
       fhir:ElementDefinition.max [ fhir:value "1" ];
       fhir:ElementDefinition.type [
         fhir:TypeRefComponent.code [ fhir:value "id" ]
       ];
       fhir:ElementDefinition.isSummary [ fhir:value "true" ]
     ], [
       fhir:Element.id [ fhir:value "Expression.language" ];
       fhir:ElementDefinition.path [ fhir:value "Expression.language" ];
       fhir:ElementDefinition.short [ fhir:value "text/cql | text/fhirpath | application/x-fhir-query | etc." ];
       fhir:ElementDefinition.definition [ fhir:value "The media type of the language for the expression." ];
       fhir:ElementDefinition.requirements [ fhir:value "The cardinality of this element is optional to allow text only as part of the authoring process.  However, in order to be executable, the expression element must be specified." ];
       fhir:ElementDefinition.min [ fhir:value "0" ];
       fhir:ElementDefinition.max [ fhir:value "1" ];
       fhir:ElementDefinition.type [
         fhir:TypeRefComponent.code [ fhir:value "code" ]
       ];
       fhir:ElementDefinition.isSummary [ fhir:value "true" ];
       fhir:ElementDefinition.binding [
         fhir:Element.extension [
           fhir:Extension.url [ fhir:value "http://hl7.org/fhir/build/StructureDefinition/binding-definition" ];
           fhir:Extension.value [ fhir:value "The media type of the expression language." ]
         ], [
           fhir:Extension.url [ fhir:value "http://hl7.org/fhir/StructureDefinition/elementdefinition-maxValueSet" ];
           fhir:Extension.value [ fhir:value "http://hl7.org/fhir/ValueSet/mimetypes" ]
         ], [
           fhir:Extension.url [ fhir:value "http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName" ];
           fhir:Extension.value [ fhir:value "ExpressionLanguage" ]
         ];
         fhir:ElementDefinitionBindingComponent.strength [ fhir:value "extensible" ];
         fhir:ElementDefinitionBindingComponent.valueSet [ fhir:value "http://hl7.org/fhir/ValueSet/expression-language" ]
       ]
     ], [
       fhir:Element.id [ fhir:value "Expression.expression" ];
       fhir:ElementDefinition.path [ fhir:value "Expression.expression" ];
       fhir:ElementDefinition.short [ fhir:value "Expression in specified language" ];
       fhir:ElementDefinition.definition [ fhir:value "An expression in the specified language that returns a value." ];
       fhir:ElementDefinition.comment [ fhir:value "If Expression.expression and Expression.reference are both present, the Expression.expression might just be a name pointing something within the referenced content." ];
       fhir:ElementDefinition.min [ fhir:value "0" ];
       fhir:ElementDefinition.max [ fhir:value "1" ];
       fhir:ElementDefinition.type [
         fhir:TypeRefComponent.code [ fhir:value "string" ]
       ];
       fhir:ElementDefinition.isSummary [ fhir:value "true" ]
     ], [
       fhir:Element.id [ fhir:value "Expression.reference" ];
       fhir:ElementDefinition.path [ fhir:value "Expression.reference" ];
       fhir:ElementDefinition.short [ fhir:value "Where the expression is found" ];
       fhir:ElementDefinition.definition [ fhir:value "A URI that defines where the expression is found." ];
       fhir:ElementDefinition.comment [ fhir:value "If both a reference and an expression is found, the reference SHALL point to the same expression." ];
       fhir:ElementDefinition.min [ fhir:value "0" ];
       fhir:ElementDefinition.max [ fhir:value "1" ];
       fhir:ElementDefinition.type [
         fhir:TypeRefComponent.code [ fhir:value "uri" ]
       ];
       fhir:ElementDefinition.isSummary [ fhir:value "true" ]
     ]
  ] .

# -------------------------------------------------------------------------------------

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.