{
"description": "An expression that defines the criteria for group membership. This extension can only be used on a Group resource with a membership of `definitional`. When this expression is used, the Group resource cannot have any characteristic elements; this mechanism is exclusive with characteristics. The result of the expression SHALL be boolean-valued. The expression SHALL be parameterized with a `%context` variable that represents the subject being tested for membership. If evaluation of the expression results in `true`, the subject is considered a member of the group.",
"_filename": "StructureDefinition-characteristicExpression.json",
"package_name": "hl7.fhir.uv.extensions.r4",
"date": "2013-12-05",
"derivation": "constraint",
"publisher": "HL7 International / FHIR Infrastructure",
"fhirVersion": "5.0.0",
"jurisdiction": [ {
"coding": [ {
"code": "001",
"system": "http://unstats.un.org/unsd/methods/m49/m49.htm"
} ]
} ],
"name": "CharacteristicExpression",
"mapping": [ {
"uri": "http://hl7.org/v3",
"name": "RIM Mapping",
"identity": "rim"
} ],
"abstract": false,
"type": "Extension",
"experimental": "false",
"resourceType": "StructureDefinition",
"title": "Characteristic Expression",
"package_version": "5.1.0-cibuild",
"extension": [ {
"url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-wg",
"valueCode": "fhir"
}, {
"url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm",
"valueInteger": 2
}, {
"url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status",
"valueCode": "trial-use"
}, {
"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",
"source": "http://hl7.org/fhir/StructureDefinition/Element",
"severity": "error",
"expression": "hasValue() or (children().count() > id.count())"
}, {
"key": "ext-1",
"human": "Must have either extensions or value[x], not both",
"source": "http://hl7.org/fhir/StructureDefinition/Extension",
"severity": "error",
"expression": "extension.exists() != value.exists()"
} ],
"path": "Extension",
"min": 0,
"definition": "An expression that defines the criteria for group membership. This extension can only be used on a Group resource with a membership of `definitional`. When this expression is used, the Group resource cannot have any characteristic elements; this mechanism is exclusive with characteristics. The result of the expression SHALL be boolean-valued. The expression SHALL be parameterized with a `%context` variable that represents the subject being tested for membership. If evaluation of the expression results in `true`, the subject is considered a member of the group.",
"isModifier": false,
"short": "Criteria for group membership",
"max": "1",
"id": "Extension",
"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.",
"isModifier": false,
"short": "Unique id for inter-element referencing",
"mapping": [ {
"map": "n/a",
"identity": "rim"
} ],
"type": [ {
"code": "http://hl7.org/fhirpath/System.String",
"extension": [ {
"url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type",
"valueUrl": "id"
} ]
} ],
"representation": [ "xmlAttr" ],
"max": "1",
"id": "Extension.id",
"condition": [ "ele-1" ],
"base": {
"max": "1",
"min": 0,
"path": "Element.id"
},
"isSummary": false
}, {
"constraint": [ {
"key": "ele-1",
"human": "All FHIR elements must have a @value or children",
"source": "http://hl7.org/fhir/StructureDefinition/Element",
"severity": "error",
"expression": "hasValue() or (children().count() > id.count())"
}, {
"key": "ext-1",
"human": "Must have either extensions or value[x], not both",
"source": "http://hl7.org/fhir/StructureDefinition/Extension",
"severity": "error",
"expression": "extension.exists() != value.exists()"
} ],
"path": "Extension.extension",
"min": 0,
"definition": "An Extension",
"isModifier": false,
"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",
"base": {
"max": "*",
"min": 0,
"path": "Element.extension"
},
"isSummary": false
}, {
"path": "Extension.url",
"min": 1,
"definition": "Source of the definition for the extension code - a logical name or a URL.",
"isModifier": false,
"short": "identifies the meaning of the extension",
"fixedUri": "http://hl7.org/fhir/StructureDefinition/characteristicExpression",
"mapping": [ {
"map": "N/A",
"identity": "rim"
} ],
"type": [ {
"code": "http://hl7.org/fhirpath/System.String",
"extension": [ {
"url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type",
"valueUrl": "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"
},
"isSummary": false
}, {
"constraint": [ {
"key": "ele-1",
"human": "All FHIR elements must have a @value or children",
"source": "http://hl7.org/fhir/StructureDefinition/Element",
"severity": "error",
"expression": "hasValue() or (children().count() > id.count())"
} ],
"path": "Extension.value[x]",
"min": 1,
"definition": "Value of extension - must be one of a constrained set of the data types (see [Extensibility](http://hl7.org/fhir/R5/extensibility.html) for a list).",
"isModifier": false,
"short": "Value of extension",
"mapping": [ {
"map": "N/A",
"identity": "rim"
} ],
"type": [ {
"code": "Expression"
} ],
"max": "1",
"id": "Extension.value[x]",
"condition": [ "ext-1" ],
"base": {
"max": "1",
"min": 0,
"path": "Extension.value[x]"
},
"isSummary": false
} ]
},
"status": "draft",
"id": "6259b72c-2093-43c6-83e3-b7e1c1274ade",
"kind": "complex-type",
"url": "http://hl7.org/fhir/StructureDefinition/characteristicExpression",
"identifier": [ {
"value": "urn:oid:2.16.840.1.113883.4.642.5.1557",
"system": "urn:ietf:rfc:3986"
} ],
"context": [ {
"type": "element",
"expression": "Group"
} ],
"version": "5.1.0-cibuild",
"differential": {
"element": [ {
"id": "Extension",
"max": "1",
"min": 0,
"path": "Extension",
"short": "Criteria for group membership",
"definition": "An expression that defines the criteria for group membership. This extension can only be used on a Group resource with a membership of `definitional`. When this expression is used, the Group resource cannot have any characteristic elements; this mechanism is exclusive with characteristics. The result of the expression SHALL be boolean-valued. The expression SHALL be parameterized with a `%context` variable that represents the subject being tested for membership. If evaluation of the expression results in `true`, the subject is considered a member of the group."
}, {
"id": "Extension.extension",
"max": "0",
"path": "Extension.extension"
}, {
"id": "Extension.url",
"path": "Extension.url",
"fixedUri": "http://hl7.org/fhir/StructureDefinition/characteristicExpression"
}, {
"id": "Extension.value[x]",
"min": 1,
"path": "Extension.value[x]",
"type": [ {
"code": "Expression"
} ]
} ]
},
"contact": [ {
"telecom": [ {
"value": "http://www.hl7.org/Special/committees/fiwg",
"system": "url"
} ]
} ],
"baseDefinition": "http://hl7.org/fhir/StructureDefinition/Extension"
}