{"abstract":false,"baseDefinition":"http://hl7.org/fhir/StructureDefinition/Extension","contact":[{"telecom":[{"system":"url","value":"http://hl7.org/special/committees/FHIR"}]}],"context":["ElementDefinition"],"contextType":"datatype","date":"2015-02-28","derivation":"constraint","description":"A FHIRPath statement that defines whether an element is in the slice.","differential":{"element":[{"comment":"This extension can only appear on element definitions that are part of a set of slices, and not on the slicing definition itself. If the selector appears in the presence of nominated slices discriminators, then the slicing defined by the discriminator(s) and the selector on each slice must agree. In the absence of any nominated discriminators, then an element is allowed to be in multiple slices.","definition":"A FHIRPath statement that defines whether an element is in the slice.","id":"Extension","mapping":[{"identity":"rim","map":"N/A (MIF territory)"}],"max":"1","min":0,"path":"Extension","short":"FHIRPath that defines the selection criteria for a slice"},{"id":"Extension.extension","max":"0","path":"Extension.extension"},{"fixedUri":"http://hl7.org/fhir/StructureDefinition/elementdefinition-selector","id":"Extension.url","path":"Extension.url","type":[{"code":"uri"}]},{"id":"Extension.valueString","path":"Extension.valueString","type":[{"code":"string"}]}]},"extension":[{"url":"http://hl7.org/fhir/StructureDefinition/structuredefinition-wg","valueCode":"fhir"},{"url":"http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm","valueInteger":1}],"fhirVersion":"3.2.0","id":"elementdefinition-selector","kind":"complex-type","mapping":[{"identity":"rim","name":"RIM Mapping","uri":"http://hl7.org/v3"}],"name":"selector","publisher":"Health Level Seven, Inc. - FHIR Core WG","resourceType":"StructureDefinition","snapshot":{"element":[{"base":{"max":"*","min":0,"path":"Extension"},"comment":"This extension can only appear on element definitions that are part of a set of slices, and not on the slicing definition itself. If the selector appears in the presence of nominated slices discriminators, then the slicing defined by the discriminator(s) and the selector on each slice must agree. In the absence of any nominated discriminators, then an element is allowed to be in multiple slices.","condition":["ele-1"],"constraint":[{"expression":"hasValue() | (children().count() > id.count())","human":"All FHIR elements must have a @value or children","key":"ele-1","severity":"error","source":"Element","xpath":"@value|f:*|h:div"},{"expression":"extension.exists() != value.exists()","human":"Must have either extensions or value[x], not both","key":"ext-1","severity":"error","source":"Extension","xpath":"exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])"}],"definition":"A FHIRPath statement that defines whether an element is in the slice.","id":"Extension","mapping":[{"identity":"rim","map":"N/A (MIF territory)"}],"max":"1","min":0,"path":"Extension","short":"FHIRPath that defines the selection criteria for a slice"},{"base":{"max":"1","min":0,"path":"Element.id"},"definition":"unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.","id":"Extension.id","mapping":[{"identity":"rim","map":"n/a"}],"max":"1","min":0,"path":"Extension.id","representation":["xmlAttr"],"short":"xml:id (or equivalent in JSON)","type":[{"code":"string"}]},{"base":{"max":"*","min":0,"path":"Element.extension"},"definition":"An Extension","id":"Extension.extension","max":"0","min":0,"path":"Extension.extension","short":"Extension","slicing":{"description":"Extensions are always sliced by (at least) url","discriminator":[{"path":"url","type":"value"}],"rules":"open"},"type":[{"code":"Extension"}]},{"base":{"max":"1","min":1,"path":"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.","definition":"Source of the definition for the extension code - a logical name or a URL.","fixedUri":"http://hl7.org/fhir/StructureDefinition/elementdefinition-selector","id":"Extension.url","mapping":[{"identity":"rim","map":"N/A"}],"max":"1","min":1,"path":"Extension.url","representation":["xmlAttr"],"short":"identifies the meaning of the extension","type":[{"code":"uri"}]},{"base":{"max":"1","min":0,"path":"Extension.value[x]"},"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).","id":"Extension.valueString","mapping":[{"identity":"rim","map":"N/A"}],"max":"1","min":0,"path":"Extension.valueString","short":"Value of extension","type":[{"code":"string"}]}]},"status":"draft","type":"Extension","url":"http://hl7.org/fhir/StructureDefinition/elementdefinition-selector"}