{"resourceType":"StructureDefinition","id":"snapshot-behavior","language":"en","extension":[{"url":"http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm","valueInteger":2},{"url":"http://hl7.org/fhir/StructureDefinition/structuredefinition-wg","valueCode":"fhir"},{"url":"http://hl7.org/fhir/StructureDefinition/structuredefinition-type-characteristics","valueCode":"can-bind"}],"url":"http://hl7.org/fhir/tools/StructureDefinition/snapshot-behavior","identifier":[{"system":"urn:ietf:rfc:3986","value":"urn:oid:2.16.840.1.113883.4.642.40.1.42.53"}],"version":"1.1.0","name":"ExtensionSnapshotBehavior","title":"Extension Snapshot Behavior","status":"active","experimental":false,"date":"2026-03-03T22:50:55+11:00","publisher":"HL7 International / FHIR Infrastructure","contact":[{"telecom":[{"system":"url","value":"http://www.hl7.org/Special/committees/fiwg"}]}],"description":"Defines how an extension is treated when generating snapshots - ignore, add, override, defer","jurisdiction":[{"coding":[{"system":"http://unstats.un.org/unsd/methods/m49/m49.htm","code":"001"}]}],"fhirVersion":"4.0.1","mapping":[{"identity":"rim","uri":"http://hl7.org/v3","name":"RIM Mapping"}],"kind":"complex-type","abstract":false,"context":[{"type":"element","expression":"StructureDefinition"}],"type":"Extension","baseDefinition":"http://hl7.org/fhir/StructureDefinition/Extension","derivation":"constraint","snapshot":{"extension":[{"url":"http://hl7.org/fhir/tools/StructureDefinition/snapshot-base-version","valueString":"4.0.1"}],"element":[{"id":"Extension","path":"Extension","short":"Defines how an extension is treated when generating snapshots - ignore, add, override, defer","definition":"Defines how an extension is treated when generating snapshots - ignore, add, override, defer","min":0,"max":"*","base":{"path":"Extension","min":0,"max":"*"},"condition":["ele-1"],"constraint":[{"key":"ele-1","severity":"error","human":"All FHIR elements must have a @value or children","expression":"hasValue() or (children().count() > id.count())","xpath":"@value|f:*|h:div","source":"http://hl7.org/fhir/StructureDefinition/Element"},{"key":"ext-1","severity":"error","human":"Must have either extensions or value[x], not both","expression":"extension.exists() != value.exists()","xpath":"exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])","source":"http://hl7.org/fhir/StructureDefinition/Extension"}],"isModifier":false},{"id":"Extension.id","path":"Extension.id","representation":["xmlAttr"],"short":"Unique id for inter-element referencing","definition":"Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.","min":0,"max":"1","base":{"path":"Element.id","min":0,"max":"1"},"type":[{"extension":[{"url":"http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type","valueUrl":"string"}],"code":"http://hl7.org/fhirpath/System.String"}],"isModifier":false,"isSummary":false,"mapping":[{"identity":"rim","map":"n/a"}]},{"id":"Extension.extension","path":"Extension.extension","slicing":{"discriminator":[{"type":"value","path":"url"}],"description":"Extensions are always sliced by (at least) url","rules":"open"},"short":"Extension","definition":"An Extension","min":0,"max":"0","base":{"path":"Element.extension","min":0,"max":"*"},"type":[{"code":"Extension"}],"constraint":[{"key":"ele-1","severity":"error","human":"All FHIR elements must have a @value or children","expression":"hasValue() or (children().count() > id.count())","xpath":"@value|f:*|h:div","source":"http://hl7.org/fhir/StructureDefinition/Element"},{"key":"ext-1","severity":"error","human":"Must have either extensions or value[x], not both","expression":"extension.exists() != value.exists()","xpath":"exists(f:extension)!=exists(f:*[starts-with(local-name(.), \"value\")])","source":"http://hl7.org/fhir/StructureDefinition/Extension"}],"isModifier":false,"isSummary":false},{"id":"Extension.url","path":"Extension.url","representation":["xmlAttr"],"short":"identifies the meaning of the extension","definition":"Source of the definition for the extension code - a logical name or a 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.","min":1,"max":"1","base":{"path":"Extension.url","min":1,"max":"1"},"type":[{"extension":[{"url":"http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type","valueUrl":"uri"}],"code":"http://hl7.org/fhirpath/System.String"}],"fixedUri":"http://hl7.org/fhir/tools/StructureDefinition/snapshot-behavior","isModifier":false,"isSummary":false,"mapping":[{"identity":"rim","map":"N/A"}]},{"id":"Extension.value[x]","path":"Extension.value[x]","short":"Value of extension","definition":"Value of extension - must be one of a constrained set of the data types (see [Extensibility](http://hl7.org/fhir/R4/extensibility.html) for a list).","min":1,"max":"1","base":{"path":"Extension.value[x]","min":0,"max":"1"},"type":[{"code":"code"}],"constraint":[{"key":"ele-1","severity":"error","human":"All FHIR elements must have a @value or children","expression":"hasValue() or (children().count() > id.count())","xpath":"@value|f:*|h:div","source":"http://hl7.org/fhir/StructureDefinition/Element"}],"isModifier":false,"isSummary":false,"binding":{"strength":"required","valueSet":"http://hl7.org/fhir/tools/ValueSet/snapshot-behavior"},"mapping":[{"identity":"rim","map":"N/A"}]}]},"differential":{"element":[{"id":"Extension","path":"Extension","short":"Defines how an extension is treated when generating snapshots - ignore, add, override, defer","definition":"Defines how an extension is treated when generating snapshots - ignore, add, override, defer","min":0,"max":"*"},{"id":"Extension.extension","path":"Extension.extension","min":0,"max":"0"},{"id":"Extension.url","path":"Extension.url","fixedUri":"http://hl7.org/fhir/tools/StructureDefinition/snapshot-behavior"},{"id":"Extension.value[x]","path":"Extension.value[x]","min":1,"type":[{"code":"code"}],"binding":{"strength":"required","valueSet":"http://hl7.org/fhir/tools/ValueSet/snapshot-behavior"}}]}}