<status value="draft" /> <date value="2019-10-16" /> <description value="Reference to specific elements of the target resource. Can optionally provide the changed values of the element (old and new)" /> <purpose value="reference specific elements in the target resource using valueUri" /> <fhirVersion value="4.0.0" /> <kind value="complex-type" /> <abstract value="false" /> <context> <type value="element" /> <expression value="Reference" /> </context> <type value="Extension" /> <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Extension" /> <derivation value="constraint" /> <snapshot> <element id="Extension"> <path value="Extension" /> <short value="Reference to specific elements of the target resource" /> <definition value="Reference to specific elements of the target resource. Can optionally provide the changed values of the element (old and new)" /> <min value="0" /> <max value="*" /> <base> <path value="Extension" /> <min value="0" /> <max value="*" /> </base> <condition value="ele-1" /> <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> <mapping> <identity value="rim" /> <map value="n/a" /> </mapping> <mapping> <identity value="rim" /> <map value="N/A" /> </mapping> </element> <element id="Extension.id"> <path value="Extension.id" /> <representation value="xmlAttr" /> <short value="Unique id for inter-element referencing" /> <definition value="Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces." /> <min value="0" /> <max value="1" /> <base> <path value="Element.id" /> <min value="0" /> <max value="1" /> </base> <type> <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type"> <valueUrl value="string" /> </extension> <code value="http://hl7.org/fhirpath/System.String" /> </type> <mapping> <identity value="rim" /> <map value="n/a" /> </mapping> </element> <element id="Extension.extension"> <path value="Extension.extension" /> <slicing> <discriminator> <type value="value" /> <path value="url" /> </discriminator> <description value="Extensions are always sliced by (at least) url" /> <rules value="open" /> </slicing> <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 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." /> <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> <condition value="ele-1" /> <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> <mapping> <identity value="rim" /> <map value="n/a" /> </mapping> <mapping> <identity value="rim" /> <map value="N/A" /> </mapping> </element> <element id="Extension.extension:elementUri"> <path value="Extension.extension" /> <sliceName value="elementUri" /> <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 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." /> <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="1" /> <base> <path value="Element.extension" /> <min value="0" /> <max value="*" /> </base> <type> <code value="Extension" /> </type> <condition value="ele-1" /> <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> <mapping> <identity value="rim" /> <map value="n/a" /> </mapping> <mapping> <identity value="rim" /> <map value="N/A" /> </mapping> </element> <element id="Extension.extension:elementUri.id"> <path value="Extension.extension.id" /> <representation value="xmlAttr" /> <short value="Unique id for inter-element referencing" /> <definition value="Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces." /> <min value="0" /> <max value="1" /> <base> <path value="Element.id" /> <min value="0" /> <max value="1" /> </base> <type> <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type"> <valueUrl value="string" /> </extension> <code value="http://hl7.org/fhirpath/System.String" /> </type> <mapping> <identity value="rim" /> <map value="n/a" /> </mapping> </element> <element id="Extension.extension:elementUri.extension"> <path value="Extension.extension.extension" /> <slicing> <discriminator> <type value="value" /> <path value="url" /> </discriminator> <description value="Extensions are always sliced by (at least) url" /> <rules value="open" /> </slicing> <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 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." /> <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> <condition value="ele-1" /> <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> <mapping> <identity value="rim" /> <map value="n/a" /> </mapping> <mapping> <identity value="rim" /> <map value="N/A" /> </mapping> </element> <element id="Extension.extension:elementUri.url"> <path value="Extension.extension.url" /> <representation value="xmlAttr" /> <short value="identifies the meaning of the extension" /> <definition value="Source of the definition for the extension code - a logical name or a URL." /> <comment value="The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension." /> <min value="1" /> <max value="1" /> <base> <path value="Extension.url" /> <min value="1" /> <max value="1" /> </base> <type> <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type"> <valueUrl value="uri" /> </extension> <code value="http://hl7.org/fhirpath/System.String" /> </type> <fixedUri value="elementUri" /> <mapping> <identity value="rim" /> <map value="N/A" /> </mapping> </element> <element id="Extension.extension:elementUri.value[x]"> <path value="Extension.extension.value[x]" /> <short value="Reference to the specific element of the target resource" /> <definition value="Reference to the specific element of the target resource" /> <min value="0" /> <max value="1" /> <base> <path value="Extension.value[x]" /> <min value="0" /> <max value="1" /> </base> <type> <code value="uri" /> </type> <example> <label value="Full uri syntax" /> <valueUri value="gender/gender1" /> </example> <example> <label value="hashtag id syntax" /> <valueUri value="#gender1" /> </example> <condition value="ele-1" /> <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> <mapping> <identity value="rim" /> <map value="n/a" /> </mapping> <mapping> <identity value="rim" /> <map value="N/A" /> </mapping> </element> <element id="Extension.extension:change"> <path value="Extension.extension" /> <sliceName value="change" /> <short value="The old and new value of the changed element" /> <definition value="The old and new value of the changed element" /> <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="1" /> <base> <path value="Element.extension" /> <min value="0" /> <max value="*" /> </base> <type> <code value="Extension" /> </type> <condition value="ele-1" /> <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> <mapping> <identity value="rim" /> <map value="n/a" /> </mapping> <mapping> <identity value="rim" /> <map value="N/A" /> </mapping> </element> <element id="Extension.extension:change.id"> <path value="Extension.extension.id" /> <representation value="xmlAttr" /> <short value="Unique id for inter-element referencing" /> <definition value="Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces." /> <min value="0" /> <max value="1" /> <base> <path value="Element.id" /> <min value="0" /> <max value="1" /> </base> <type> <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type"> <valueUrl value="string" /> </extension> <code value="http://hl7.org/fhirpath/System.String" /> </type> <mapping> <identity value="rim" /> <map value="n/a" /> </mapping> </element> <element id="Extension.extension:change.extension"> <path value="Extension.extension.extension" /> <slicing> <discriminator> <type value="value" /> <path value="url" /> </discriminator> <description value="Extensions are always sliced by (at least) url" /> <rules value="open" /> </slicing> <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 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." /> <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> <condition value="ele-1" /> <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> <mapping> <identity value="rim" /> <map value="n/a" /> </mapping> <mapping> <identity value="rim" /> <map value="N/A" /> </mapping> </element> <element id="Extension.extension:change.extension:oldValue"> <path value="Extension.extension.extension" /> <sliceName value="oldValue" /> <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 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." /> <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="1" /> <base> <path value="Element.extension" /> <min value="0" /> <max value="*" /> </base> <type> <code value="Extension" /> </type> <condition value="ele-1" /> <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> <mapping> <identity value="rim" /> <map value="n/a" /> </mapping> <mapping> <identity value="rim" /> <map value="N/A" /> </mapping> </element> <element id="Extension.extension:change.extension:oldValue.id"> <path value="Extension.extension.extension.id" /> <representation value="xmlAttr" /> <short value="Unique id for inter-element referencing" /> <definition value="Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces." /> <min value="0" /> <max value="1" /> <base> <path value="Element.id" /> <min value="0" /> <max value="1" /> </base> <type> <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type"> <valueUrl value="string" /> </extension> <code value="http://hl7.org/fhirpath/System.String" /> </type> <mapping> <identity value="rim" /> <map value="n/a" /> </mapping> </element> <element id="Extension.extension:change.extension:oldValue.extension"> <path value="Extension.extension.extension.extension" /> <slicing> <discriminator> <type value="value" /> <path value="url" /> </discriminator> <description value="Extensions are always sliced by (at least) url" /> <rules value="open" /> </slicing> <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 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." /> <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> <condition value="ele-1" /> <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> <mapping> <identity value="rim" /> <map value="n/a" /> </mapping> <mapping> <identity value="rim" /> <map value="N/A" /> </mapping> </element> <element id="Extension.extension:change.extension:oldValue.url"> <path value="Extension.extension.extension.url" /> <representation value="xmlAttr" /> <short value="identifies the meaning of the extension" /> <definition value="Source of the definition for the extension code - a logical name or a URL." /> <comment value="The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension." /> <min value="1" /> <max value="1" /> <base> <path value="Extension.url" /> <min value="1" /> <max value="1" /> </base> <type> <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type"> <valueUrl value="uri" /> </extension> <code value="http://hl7.org/fhirpath/System.String" /> </type> <fixedUri value="oldValue" /> <mapping> <identity value="rim" /> <map value="N/A" /> </mapping> </element> <element id="Extension.extension:change.extension:oldValue.value[x]"> <path value="Extension.extension.extension.value[x]" /> <short value="The old value of the element" /> <definition value="The old value of the element" /> <min value="0" /> <max value="1" /> <base> <path value="Extension.value[x]" /> <min value="0" /> <max value="1" /> </base> <type> <code value="base64Binary" /> </type> <type> <code value="boolean" /> </type> <type> <code value="canonical" /> </type> <type> <code value="code" /> </type> <type> <code value="date" /> </type> <type> <code value="dateTime" /> </type> <type> <code value="decimal" /> </type> <type> <code value="id" /> </type> <type> <code value="instant" /> </type> <type> <code value="integer" /> </type> <type> <code value="markdown" /> </type> <type> <code value="oid" /> </type> <type> <code value="positiveInt" /> </type> <type> <code value="string" /> </type> <type> <code value="time" /> </type> <type> <code value="unsignedInt" /> </type> <type> <code value="uri" /> </type> <type> <code value="url" /> </type> <type> <code value="uuid" /> </type> <type> <code value="Address" /> </type> <type> <code value="Age" /> </type> <type> <code value="Annotation" /> </type> <type> <code value="Attachment" /> </type> <type> <code value="CodeableConcept" /> </type> <type> <code value="Coding" /> </type> <type> <code value="ContactPoint" /> </type> <type> <code value="Count" /> </type> <type> <code value="Distance" /> </type> <type> <code value="Duration" /> </type> <type> <code value="HumanName" /> </type> <type> <code value="Identifier" /> </type> <type> <code value="Money" /> </type> <type> <code value="Period" /> </type> <type> <code value="Quantity" /> </type> <type> <code value="Range" /> </type> <type> <code value="Ratio" /> </type> <type> <code value="Reference" /> </type> <type> <code value="SampledData" /> </type> <type> <code value="Signature" /> </type> <type> <code value="Timing" /> </type> <type> <code value="ContactDetail" /> </type> <type> <code value="Contributor" /> </type> <type> <code value="DataRequirement" /> </type> <type> <code value="Expression" /> </type> <type> <code value="ParameterDefinition" /> </type> <type> <code value="RelatedArtifact" /> </type> <type> <code value="TriggerDefinition" /> </type> <type> <code value="UsageContext" /> </type> <type> <code value="Dosage" /> </type> <type> <code value="Meta" /> </type> <condition value="ele-1" /> <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> <mapping> <identity value="rim" /> <map value="n/a" /> </mapping> <mapping> <identity value="rim" /> <map value="N/A" /> </mapping> </element> <element id="Extension.extension:change.extension:newValue"> <path value="Extension.extension.extension" /> <sliceName value="newValue" /> <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 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." /> <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="1" /> <base> <path value="Element.extension" /> <min value="0" /> <max value="*" /> </base> <type> <code value="Extension" /> </type> <condition value="ele-1" /> <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> <mapping> <identity value="rim" /> <map value="n/a" /> </mapping> <mapping> <identity value="rim" /> <map value="N/A" /> </mapping> </element> <element id="Extension.extension:change.extension:newValue.id"> <path value="Extension.extension.extension.id" /> <representation value="xmlAttr" /> <short value="Unique id for inter-element referencing" /> <definition value="Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces." /> <min value="0" /> <max value="1" /> <base> <path value="Element.id" /> <min value="0" /> <max value="1" /> </base> <type> <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type"> <valueUrl value="string" /> </extension> <code value="http://hl7.org/fhirpath/System.String" /> </type> <mapping> <identity value="rim" /> <map value="n/a" /> </mapping> </element> <element id="Extension.extension:change.extension:newValue.extension"> <path value="Extension.extension.extension.extension" /> <slicing> <discriminator> <type value="value" /> <path value="url" /> </discriminator> <description value="Extensions are always sliced by (at least) url" /> <rules value="open" /> </slicing> <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 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." /> <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> <condition value="ele-1" /> <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> <mapping> <identity value="rim" /> <map value="n/a" /> </mapping> <mapping> <identity value="rim" /> <map value="N/A" /> </mapping> </element> <element id="Extension.extension:change.extension:newValue.url"> <path value="Extension.extension.extension.url" /> <representation value="xmlAttr" /> <short value="identifies the meaning of the extension" /> <definition value="Source of the definition for the extension code - a logical name or a URL." /> <comment value="The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension." /> <min value="1" /> <max value="1" /> <base> <path value="Extension.url" /> <min value="1" /> <max value="1" /> </base> <type> <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type"> <valueUrl value="uri" /> </extension> <code value="http://hl7.org/fhirpath/System.String" /> </type> <fixedUri value="newValue" /> <mapping> <identity value="rim" /> <map value="N/A" /> </mapping> </element> <element id="Extension.extension:change.extension:newValue.value[x]"> <path value="Extension.extension.extension.value[x]" /> <short value="The new value of the element" /> <definition value="The new value of the element" /> <min value="0" /> <max value="1" /> <base> <path value="Extension.value[x]" /> <min value="0" /> <max value="1" /> </base> <type> <code value="base64Binary" /> </type> <type> <code value="boolean" /> </type> <type> <code value="canonical" /> </type> <type> <code value="code" /> </type> <type> <code value="date" /> </type> <type> <code value="dateTime" /> </type> <type> <code value="decimal" /> </type> <type> <code value="id" /> </type> <type> <code value="instant" /> </type> <type> <code value="integer" /> </type> <type> <code value="markdown" /> </type> <type> <code value="oid" /> </type> <type> <code value="positiveInt" /> </type> <type> <code value="string" /> </type> <type> <code value="time" /> </type> <type> <code value="unsignedInt" /> </type> <type> <code value="uri" /> </type> <type> <code value="url" /> </type> <type> <code value="uuid" /> </type> <type> <code value="Address" /> </type> <type> <code value="Age" /> </type> <type> <code value="Annotation" /> </type> <type> <code value="Attachment" /> </type> <type> <code value="CodeableConcept" /> </type> <type> <code value="Coding" /> </type> <type> <code value="ContactPoint" /> </type> <type> <code value="Count" /> </type> <type> <code value="Distance" /> </type> <type> <code value="Duration" /> </type> <type> <code value="HumanName" /> </type> <type> <code value="Identifier" /> </type> <type> <code value="Money" /> </type> <type> <code value="Period" /> </type> <type> <code value="Quantity" /> </type> <type> <code value="Range" /> </type> <type> <code value="Ratio" /> </type> <type> <code value="Reference" /> </type> <type> <code value="SampledData" /> </type> <type> <code value="Signature" /> </type> <type> <code value="Timing" /> </type> <type> <code value="ContactDetail" /> </type> <type> <code value="Contributor" /> </type> <type> <code value="DataRequirement" /> </type> <type> <code value="Expression" /> </type> <type> <code value="ParameterDefinition" /> </type> <type> <code value="RelatedArtifact" /> </type> <type> <code value="TriggerDefinition" /> </type> <type> <code value="UsageContext" /> </type> <type> <code value="Dosage" /> </type> <type> <code value="Meta" /> </type> <condition value="ele-1" /> <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> <mapping> <identity value="rim" /> <map value="n/a" /> </mapping> <mapping> <identity value="rim" /> <map value="N/A" /> </mapping> </element> <element id="Extension.extension:change.url"> <path value="Extension.extension.url" /> <representation value="xmlAttr" /> <short value="identifies the meaning of the extension" /> <definition value="Source of the definition for the extension code - a logical name or a URL." /> <comment value="The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension." /> <min value="1" /> <max value="1" /> <base> <path value="Extension.url" /> <min value="1" /> <max value="1" /> </base> <type> <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type"> <valueUrl value="uri" /> </extension> <code value="http://hl7.org/fhirpath/System.String" /> </type> <fixedUri value="change" /> <mapping> <identity value="rim" /> <map value="N/A" /> </mapping> </element> <element id="Extension.extension:change.value[x]"> <path value="Extension.extension.value[x]" /> <short value="Value of extension" /> <definition value="Value of extension - must be one of a constrained set of the data types (see [Extensibility](extensibility.html) for a list)." /> <min value="0" /> <max value="0" /> <base> <path value="Extension.value[x]" /> <min value="0" /> <max value="1" /> </base> <type> <code value="base64Binary" /> </type> <type> <code value="boolean" /> </type> <type> <code value="canonical" /> </type> <type> <code value="code" /> </type> <type> <code value="date" /> </type> <type> <code value="dateTime" /> </type> <type> <code value="decimal" /> </type> <type> <code value="id" /> </type> <type> <code value="instant" /> </type> <type> <code value="integer" /> </type> <type> <code value="markdown" /> </type> <type> <code value="oid" /> </type> <type> <code value="positiveInt" /> </type> <type> <code value="string" /> </type> <type> <code value="time" /> </type> <type> <code value="unsignedInt" /> </type> <type> <code value="uri" /> </type> <type> <code value="url" /> </type> <type> <code value="uuid" /> </type> <type> <code value="Address" /> </type> <type> <code value="Age" /> </type> <type> <code value="Annotation" /> </type> <type> <code value="Attachment" /> </type> <type> <code value="CodeableConcept" /> </type> <type> <code value="Coding" /> </type> <type> <code value="ContactPoint" /> </type> <type> <code value="Count" /> </type> <type> <code value="Distance" /> </type> <type> <code value="Duration" /> </type> <type> <code value="HumanName" /> </type> <type> <code value="Identifier" /> </type> <type> <code value="Money" /> </type> <type> <code value="Period" /> </type> <type> <code value="Quantity" /> </type> <type> <code value="Range" /> </type> <type> <code value="Ratio" /> </type> <type> <code value="Reference" /> </type> <type> <code value="SampledData" /> </type> <type> <code value="Signature" /> </type> <type> <code value="Timing" /> </type> <type> <code value="ContactDetail" /> </type> <type> <code value="Contributor" /> </type> <type> <code value="DataRequirement" /> </type> <type> <code value="Expression" /> </type> <type> <code value="ParameterDefinition" /> </type> <type> <code value="RelatedArtifact" /> </type> <type> <code value="TriggerDefinition" /> </type> <type> <code value="UsageContext" /> </type> <type> <code value="Dosage" /> </type> <type> <code value="Meta" /> </type> <condition value="ele-1" /> <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> <mapping> <identity value="rim" /> <map value="n/a" /> </mapping> <mapping> <identity value="rim" /> <map value="N/A" /> </mapping> </element> <element id="Extension.url"> <path value="Extension.url" /> <representation value="xmlAttr" /> <short value="identifies the meaning of the extension" /> <definition value="Source of the definition for the extension code - a logical name or a URL." /> <comment value="The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension." /> <min value="1" /> <max value="1" /> <base> <path value="Extension.url" /> <min value="1" /> <max value="1" /> </base> <type> <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type"> <valueUrl value="uri" /> </extension> <code value="http://hl7.org/fhirpath/System.String" /> </type> <fixedUri value="http://hl7.no/fhir/StructureDefinition/reference-targetElement" /> <mapping> <identity value="rim" /> <map value="N/A" /> </mapping> </element> <element id="Extension.value[x]"> <path value="Extension.value[x]" /> <short value="Value of extension" /> <definition value="Value of extension - must be one of a constrained set of the data types (see [Extensibility](extensibility.html) for a list)." /> <min value="0" /> <max value="0" /> <base> <path value="Extension.value[x]" /> <min value="0" /> <max value="1" /> </base> <type> <code value="base64Binary" /> </type> <type> <code value="boolean" /> </type> <type> <code value="canonical" /> </type> <type> <code value="code" /> </type> <type> <code value="date" /> </type> <type> <code value="dateTime" /> </type> <type> <code value="decimal" /> </type> <type> <code value="id" /> </type> <type> <code value="instant" /> </type> <type> <code value="integer" /> </type> <type> <code value="markdown" /> </type> <type> <code value="oid" /> </type> <type> <code value="positiveInt" /> </type> <type> <code value="string" /> </type> <type> <code value="time" /> </type> <type> <code value="unsignedInt" /> </type> <type> <code value="uri" /> </type> <type> <code value="url" /> </type> <type> <code value="uuid" /> </type> <type> <code value="Address" /> </type> <type> <code value="Age" /> </type> <type> <code value="Annotation" /> </type> <type> <code value="Attachment" /> </type> <type> <code value="CodeableConcept" /> </type> <type> <code value="Coding" /> </type> <type> <code value="ContactPoint" /> </type> <type> <code value="Count" /> </type> <type> <code value="Distance" /> </type> <type> <code value="Duration" /> </type> <type> <code value="HumanName" /> </type> <type> <code value="Identifier" /> </type> <type> <code value="Money" /> </type> <type> <code value="Period" /> </type> <type> <code value="Quantity" /> </type> <type> <code value="Range" /> </type> <type> <code value="Ratio" /> </type> <type> <code value="Reference" /> </type> <type> <code value="SampledData" /> </type> <type> <code value="Signature" /> </type> <type> <code value="Timing" /> </type> <type> <code value="ContactDetail" /> </type> <type> <code value="Contributor" /> </type> <type> <code value="DataRequirement" /> </type> <type> <code value="Expression" /> </type> <type> <code value="ParameterDefinition" /> </type> <type> <code value="RelatedArtifact" /> </type> <type> <code value="TriggerDefinition" /> </type> <type> <code value="UsageContext" /> </type> <type> <code value="Dosage" /> </type> <type> <code value="Meta" /> </type> <condition value="ele-1" /> <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> <mapping> <identity value="rim" /> <map value="n/a" /> </mapping> <mapping> <identity value="rim" /> <map value="N/A" /> </mapping> </element> </snapshot> <differential> <element id="Extension"> <path value="Extension" /> <short value="Reference to specific elements of the target resource" /> <definition value="Reference to specific elements of the target resource. Can optionally provide the changed values of the element (old and new)" /> </element> <element id="Extension.extension"> <path value="Extension.extension" /> <slicing> <discriminator> <type value="value" /> <path value="url" /> </discriminator> <rules value="open" /> </slicing> </element> <element id="Extension.extension:elementUri"> <path value="Extension.extension" /> <sliceName value="elementUri" /> <max value="1" /> </element> <element id="Extension.extension:elementUri.url"> <path value="Extension.extension.url" /> <fixedUri value="elementUri" /> </element> <element id="Extension.extension:elementUri.value[x]"> <path value="Extension.extension.value[x]" /> <short value="Reference to the specific element of the target resource" /> <definition value="Reference to the specific element of the target resource" /> <type> <code value="uri" /> </type> <example> <label value="Full uri syntax" /> <valueUri value="gender/gender1" /> </example> <example> <label value="hashtag id syntax" /> <valueUri value="#gender1" /> </example> </element> <element id="Extension.extension:change"> <path value="Extension.extension" /> <sliceName value="change" /> <short value="The old and new value of the changed element" /> <definition value="The old and new value of the changed element" /> <max value="1" /> </element> <element id="Extension.extension:change.extension"> <path value="Extension.extension.extension" /> <slicing> <discriminator> <type value="value" /> <path value="url" /> </discriminator> <rules value="open" /> </slicing> </element> <element id="Extension.extension:change.extension:oldValue"> <path value="Extension.extension.extension" /> <sliceName value="oldValue" /> <max value="1" /> </element> <element id="Extension.extension:change.extension:oldValue.url"> <path value="Extension.extension.extension.url" /> <fixedUri value="oldValue" /> </element> <element id="Extension.extension:change.extension:oldValue.value[x]"> <path value="Extension.extension.extension.value[x]" /> <short value="The old value of the element" /> <definition value="The old value of the element" /> </element> <element id="Extension.extension:change.extension:newValue"> <path value="Extension.extension.extension" /> <sliceName value="newValue" /> <max value="1" /> </element> <element id="Extension.extension:change.extension:newValue.url"> <path value="Extension.extension.extension.url" /> <fixedUri value="newValue" /> </element> <element id="Extension.extension:change.extension:newValue.value[x]"> <path value="Extension.extension.extension.value[x]" /> <short value="The new value of the element" /> <definition value="The new value of the element" /> </element> <element id="Extension.extension:change.url"> <path value="Extension.extension.url" /> <fixedUri value="change" /> </element> <element id="Extension.extension:change.value[x]"> <path value="Extension.extension.value[x]" /> <max value="0" /> </element> <element id="Extension.url"> <path value="Extension.url" /> <fixedUri value="http://hl7.no/fhir/StructureDefinition/reference-targetElement" /> </element> <element id="Extension.value[x]"> <path value="Extension.value[x]" /> <max value="0" /> </element> </differential> </StructureDefinition>