{
"description": "In some logical models, the type of content at one location depends on the value of some other element, and the type is otherwise not explicit in the instance. In such cases, the type of the element is assigned an abstract ancestor type, and this extension specifies how to determine what type is actually used",
"_filename": "StructureDefinition-type-specifier.json",
"package_name": "hl7.fhir.uv.tools.r3",
"date": "2025-04-17T05:34:58+10:00",
"derivation": "constraint",
"publisher": "HL7 International / FHIR Infrastructure",
"fhirVersion": "3.0.2",
"jurisdiction": [ {
"coding": [ {
"code": "001",
"system": "http://unstats.un.org/unsd/methods/m49/m49.htm"
} ]
} ],
"name": "TypeSpecifier",
"mapping": [ {
"uri": "http://hl7.org/v3",
"name": "RIM Mapping",
"identity": "rim"
} ],
"abstract": false,
"type": "Extension",
"experimental": "false",
"resourceType": "StructureDefinition",
"title": "Type Specifier Extension",
"package_version": "0.5.0",
"extension": [ {
"url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm",
"valueInteger": 3
}, {
"url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-wg",
"valueCode": "fhir"
}, {
"url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-type-characteristics",
"valueCode": "can-bind"
} ],
"snapshot": {
"element": [ {
"constraint": [ {
"key": "ele-1",
"human": "All FHIR elements must have a @value or children",
"xpath": "@value|f:*|h:div",
"source": "http://hl7.org/fhir/StructureDefinition/Element",
"severity": "error",
"expression": "hasValue() | (children().count() > id.count())"
}, {
"key": "ext-1",
"human": "Must have either extensions or value[x], not both",
"xpath": "exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])",
"source": "http://hl7.org/fhir/StructureDefinition/Extension",
"severity": "error",
"expression": "extension.exists() != value.exists()"
} ],
"path": "Extension",
"min": 0,
"definition": "type-specifiers applied to bindable elements.",
"short": "Indicates that this repeating element is represented as an object in json and the named one of the two sub-elements is the key for the other one",
"max": "*",
"id": "Extension",
"condition": [ "ele-1" ],
"base": {
"max": "*",
"min": 0,
"path": "Extension"
}
}, {
"path": "Extension.id",
"min": 0,
"definition": "unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
"short": "xml:id (or equivalent in JSON)",
"mapping": [ {
"map": "n/a",
"identity": "rim"
} ],
"type": [ {
"code": "string"
} ],
"representation": [ "xmlAttr" ],
"max": "1",
"id": "Extension.id",
"base": {
"max": "1",
"min": 0,
"path": "Element.id"
}
}, {
"path": "Extension.extension",
"min": 2,
"definition": "An Extension",
"short": "Extension",
"slicing": {
"rules": "closed",
"description": "Extensions are always sliced by (at least) url",
"discriminator": [ {
"path": "url",
"type": "value"
} ]
},
"type": [ {
"code": "Extension"
} ],
"max": "2",
"id": "Extension.extension",
"base": {
"max": "*",
"min": 0,
"path": "Element.extension"
}
}, {
"path": "Extension.extension",
"min": 1,
"definition": "The FHIRPath expression for this type to be true.",
"short": "Condition for this type (FHIRPath)",
"type": [ {
"code": "Extension"
} ],
"sliceName": "condition",
"max": "1",
"id": "Extension.extension:condition",
"base": {
"max": "*",
"min": 0,
"path": "Element.extension"
}
}, {
"path": "Extension.extension.id",
"min": 0,
"definition": "unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
"short": "xml:id (or equivalent in JSON)",
"mapping": [ {
"map": "n/a",
"identity": "rim"
} ],
"type": [ {
"code": "string"
} ],
"representation": [ "xmlAttr" ],
"max": "1",
"id": "Extension.extension:condition.id",
"base": {
"max": "1",
"min": 0,
"path": "Element.id"
}
}, {
"path": "Extension.extension.extension",
"min": 0,
"definition": "An Extension",
"short": "Extension",
"slicing": {
"rules": "open",
"description": "Extensions are always sliced by (at least) url",
"discriminator": [ {
"path": "url",
"type": "value"
} ]
},
"type": [ {
"code": "Extension"
} ],
"max": "0",
"id": "Extension.extension:condition.extension",
"base": {
"max": "*",
"min": 0,
"path": "Element.extension"
}
}, {
"path": "Extension.extension.url",
"min": 1,
"definition": "Source of the definition for the extension code - a logical name or a URL.",
"short": "identifies the meaning of the extension",
"fixedUri": "condition",
"mapping": [ {
"map": "N/A",
"identity": "rim"
} ],
"type": [ {
"code": "uri"
} ],
"representation": [ "xmlAttr" ],
"max": "1",
"id": "Extension.extension:condition.url",
"comment": "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.",
"base": {
"max": "1",
"min": 1,
"path": "Extension.url"
}
}, {
"path": "Extension.extension.value[x]",
"min": 1,
"definition": "Value of extension - may be a resource or one of a constrained set of the data types (see Extensibility in the spec for list).",
"short": "Value of extension",
"mapping": [ {
"map": "N/A",
"identity": "rim"
} ],
"type": [ {
"code": "string"
} ],
"max": "1",
"id": "Extension.extension:condition.value[x]",
"base": {
"max": "1",
"min": 0,
"path": "Extension.value[x]"
}
}, {
"path": "Extension.extension",
"min": 1,
"definition": "An Extension",
"short": "The type (uri - usually full URI of logical model type_",
"type": [ {
"code": "Extension"
} ],
"sliceName": "type",
"max": "1",
"id": "Extension.extension:type",
"base": {
"max": "*",
"min": 0,
"path": "Element.extension"
}
}, {
"path": "Extension.extension.id",
"min": 0,
"definition": "unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
"short": "xml:id (or equivalent in JSON)",
"mapping": [ {
"map": "n/a",
"identity": "rim"
} ],
"type": [ {
"code": "string"
} ],
"representation": [ "xmlAttr" ],
"max": "1",
"id": "Extension.extension:type.id",
"base": {
"max": "1",
"min": 0,
"path": "Element.id"
}
}, {
"path": "Extension.extension.extension",
"min": 0,
"definition": "An Extension",
"short": "Extension",
"slicing": {
"rules": "open",
"description": "Extensions are always sliced by (at least) url",
"discriminator": [ {
"path": "url",
"type": "value"
} ]
},
"type": [ {
"code": "Extension"
} ],
"max": "0",
"id": "Extension.extension:type.extension",
"base": {
"max": "*",
"min": 0,
"path": "Element.extension"
}
}, {
"path": "Extension.extension.url",
"min": 1,
"definition": "Source of the definition for the extension code - a logical name or a URL.",
"short": "identifies the meaning of the extension",
"fixedUri": "type",
"mapping": [ {
"map": "N/A",
"identity": "rim"
} ],
"type": [ {
"code": "uri"
} ],
"representation": [ "xmlAttr" ],
"max": "1",
"id": "Extension.extension:type.url",
"comment": "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.",
"base": {
"max": "1",
"min": 1,
"path": "Extension.url"
}
}, {
"path": "Extension.extension.value[x]",
"min": 1,
"definition": "Value of extension - may be a resource or one of a constrained set of the data types (see Extensibility in the spec for list).",
"short": "Value of extension",
"mapping": [ {
"map": "N/A",
"identity": "rim"
} ],
"type": [ {
"code": "code"
} ],
"max": "1",
"id": "Extension.extension:type.value[x]",
"base": {
"max": "1",
"min": 0,
"path": "Extension.value[x]"
}
}, {
"path": "Extension.url",
"min": 1,
"definition": "Source of the definition for the extension code - a logical name or a URL.",
"short": "identifies the meaning of the extension",
"fixedUri": "http://hl7.org/fhir/tools/StructureDefinition/type-specifier",
"mapping": [ {
"map": "N/A",
"identity": "rim"
} ],
"type": [ {
"code": "uri"
} ],
"representation": [ "xmlAttr" ],
"max": "1",
"id": "Extension.url",
"comment": "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.",
"base": {
"max": "1",
"min": 1,
"path": "Extension.url"
}
}, {
"path": "Extension.value[x]",
"min": 0,
"definition": "Value of extension - may be a resource or one of a constrained set of the data types (see Extensibility in the spec for list).",
"short": "Value of extension",
"mapping": [ {
"map": "N/A",
"identity": "rim"
} ],
"type": [ {
"code": "base64Binary"
}, {
"code": "boolean"
}, {
"code": "code"
}, {
"code": "date"
}, {
"code": "dateTime"
}, {
"code": "decimal"
}, {
"code": "id"
}, {
"code": "instant"
}, {
"code": "integer"
}, {
"code": "markdown"
}, {
"code": "oid"
}, {
"code": "positiveInt"
}, {
"code": "string"
}, {
"code": "time"
}, {
"code": "unsignedInt"
}, {
"code": "uri"
}, {
"code": "Address"
}, {
"code": "Age"
}, {
"code": "Annotation"
}, {
"code": "Attachment"
}, {
"code": "CodeableConcept"
}, {
"code": "Coding"
}, {
"code": "ContactPoint"
}, {
"code": "Count"
}, {
"code": "Distance"
}, {
"code": "Duration"
}, {
"code": "HumanName"
}, {
"code": "Identifier"
}, {
"code": "Money"
}, {
"code": "Period"
}, {
"code": "Quantity"
}, {
"code": "Range"
}, {
"code": "Ratio"
}, {
"code": "Reference"
}, {
"code": "SampledData"
}, {
"code": "Signature"
}, {
"code": "Timing"
}, {
"code": "Meta"
} ],
"max": "0",
"id": "Extension.value[x]",
"base": {
"max": "1",
"min": 0,
"path": "Extension.value[x]"
}
} ]
},
"status": "active",
"id": "efe52d89-01f3-4a55-9424-ef94f39ab740",
"kind": "complex-type",
"url": "http://hl7.org/fhir/tools/StructureDefinition/type-specifier",
"identifier": [ {
"value": "urn:oid:2.16.840.1.113883.4.642.40.1.42.41",
"system": "urn:ietf:rfc:3986"
} ],
"context": [ "ElementDefinition" ],
"version": "0.5.0",
"differential": {
"element": [ {
"id": "Extension",
"max": "*",
"min": 0,
"path": "Extension",
"short": "Indicates that this repeating element is represented as an object in json and the named one of the two sub-elements is the key for the other one",
"definition": "type-specifiers applied to bindable elements."
}, {
"id": "Extension.extension",
"max": "2",
"min": 2,
"path": "Extension.extension",
"slicing": {
"rules": "closed",
"description": "Extensions are sliced by url",
"discriminator": [ {
"path": "url",
"type": "value"
} ]
}
}, {
"id": "Extension.extension:condition",
"max": "1",
"min": 1,
"path": "Extension.extension",
"type": [ {
"code": "Extension"
} ],
"short": "Condition for this type (FHIRPath)",
"sliceName": "condition",
"definition": "The FHIRPath expression for this type to be true."
}, {
"id": "Extension.extension:condition.extension",
"max": "0",
"path": "Extension.extension.extension"
}, {
"id": "Extension.extension:condition.url",
"path": "Extension.extension.url",
"type": [ {
"code": "uri"
} ],
"fixedUri": "condition"
}, {
"id": "Extension.extension:condition.value[x]",
"min": 1,
"path": "Extension.extension.value[x]",
"type": [ {
"code": "string"
} ]
}, {
"id": "Extension.extension:type",
"max": "1",
"min": 1,
"path": "Extension.extension",
"type": [ {
"code": "Extension"
} ],
"short": "The type (uri - usually full URI of logical model type_",
"sliceName": "type"
}, {
"id": "Extension.extension:type.extension",
"max": "0",
"path": "Extension.extension.extension"
}, {
"id": "Extension.extension:type.url",
"path": "Extension.extension.url",
"type": [ {
"code": "uri"
} ],
"fixedUri": "type"
}, {
"id": "Extension.extension:type.value[x]",
"min": 1,
"path": "Extension.extension.value[x]",
"type": [ {
"code": "code"
} ]
}, {
"id": "Extension.url",
"path": "Extension.url",
"fixedUri": "http://hl7.org/fhir/tools/StructureDefinition/type-specifier"
}, {
"id": "Extension.value[x]",
"max": "0",
"path": "Extension.value[x]"
} ]
},
"contact": [ {
"telecom": [ {
"value": "http://www.hl7.org/Special/committees/fiwg",
"system": "url"
} ]
} ],
"contextType": "datatype",
"baseDefinition": "http://hl7.org/fhir/StructureDefinition/Extension"
}