{"abstract":false,"baseDefinition":"http://hl7.org/fhir/StructureDefinition/PrimitiveType","contact":[{"telecom":[{"system":"url","value":"http://hl7.org/fhir"}]},{"telecom":[{"system":"url","value":"http://www.hl7.org/Special/committees/fiwg"}]}],"date":"2026-04-01T11:29:14+00:00","derivation":"specialization","description":"instant Type: An instant in time - known at least to the second","differential":{"element":[{"comment":"Note: This is intended for where precisely observed times are required, typically system logs etc., and not human-reported times - for them, see date and dateTime (which can be as precise as instant, but is not required to be) below. UTC offset is always required","definition":"An instant in time - known at least to the second","id":"instant","max":"*","min":0,"path":"instant","short":"Primitive Type instant"},{"definition":"Primitive value for instant","id":"instant.value","max":"1","min":0,"path":"instant.value","representation":["xmlAttr"],"short":"Primitive value for instant","type":[{"code":"http://hl7.org/fhirpath/System.DateTime","extension":[{"url":"http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type","valueUrl":"instant"},{"url":"http://hl7.org/fhir/StructureDefinition/regex","valueString":"([0-9]([0-9]([0-9][1-9]|[1-9]0)|[1-9]00)|[1-9]000)-(0[1-9]|1[0-2])-(0[1-9]|[1-2][0-9]|3[0-1])T([01][0-9]|2[0-3]):[0-5][0-9]:([0-5][0-9]|60)(\\.[0-9]{1,9})?(Z|(\\+|-)((0[0-9]|1[0-3]):[0-5][0-9]|14:00))"}]}]}]},"experimental":false,"extension":[{"url":"http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status","valueCode":"normative"},{"url":"http://hl7.org/fhir/StructureDefinition/structuredefinition-normative-version","valueCode":"4.0.0"},{"url":"http://hl7.org/fhir/StructureDefinition/structuredefinition-type-characteristics","valueCode":"has-range"},{"url":"http://hl7.org/fhir/StructureDefinition/structuredefinition-type-characteristics","valueCode":"is-continuous"},{"url":"http://hl7.org/fhir/StructureDefinition/structuredefinition-type-characteristics","valueCode":"has-length"},{"url":"http://hl7.org/fhir/StructureDefinition/structuredefinition-wg","valueCode":"fhir"}],"fhirVersion":"6.0.0-ballot4","id":"instant","jurisdiction":[{"coding":[{"code":"001","display":"World","system":"http://unstats.un.org/unsd/methods/m49/m49.htm"}]}],"kind":"primitive-type","name":"instant","publisher":"HL7 International / FHIR Infrastructure","resourceType":"StructureDefinition","snapshot":{"element":[{"base":{"max":"*","min":0,"path":"instant"},"comment":"Note: This is intended for where precisely observed times are required, typically system logs etc., and not human-reported times - for them, see date and dateTime (which can be as precise as instant, but is not required to be) below. UTC offset is always required","constraint":[{"expression":"hasValue() or (children().count() > id.count())","human":"All FHIR elements must have a @value or children or both","key":"ele-1","severity":"error","source":"http://hl7.org/fhir/StructureDefinition/Element"}],"definition":"An instant in time - known at least to the second","id":"instant","isModifier":false,"isSummary":false,"max":"*","min":0,"path":"instant","short":"Primitive Type instant"},{"base":{"max":"1","min":0,"path":"Element.id"},"definition":"unique id for the element within a resource (for internal references)","id":"instant.id","isModifier":false,"isSummary":false,"max":"1","min":0,"path":"instant.id","representation":["xmlAttr"],"short":"xml:id (or equivalent in JSON)","type":[{"code":"http://hl7.org/fhirpath/System.String","extension":[{"url":"http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type","valueUrl":"string"}]}]},{"alias":["extensions","user content"],"base":{"max":"*","min":0,"path":"Element.extension"},"comment":"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.","constraint":[{"expression":"hasValue() or (children().count() > id.count())","human":"All FHIR elements must have a @value or children","key":"ele-1","severity":"error","source":"http://hl7.org/fhir/StructureDefinition/Element"},{"expression":"extension.exists() != value.exists()","human":"Must have either extensions or value[x], not both","key":"ext-1","severity":"error","source":"http://hl7.org/fhir/StructureDefinition/Extension"}],"definition":"May be used to represent additional information that is not part of the basic definition of the resource. To make the use of extensions safe and managable, 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.","id":"instant.extension","isModifier":false,"isSummary":false,"max":"*","min":0,"path":"instant.extension","short":"Additional content defined by implementations","type":[{"code":"Extension"}]},{"base":{"max":"1","min":0,"path":"instant.value"},"definition":"The actual value","id":"instant.value","isModifier":false,"isSummary":false,"max":"1","min":0,"path":"instant.value","representation":["xmlAttr"],"short":"Primitive value for instant","type":[{"code":"http://hl7.org/fhirpath/System.DateTime","extension":[{"url":"http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type","valueUrl":"instant"},{"url":"http://hl7.org/fhir/StructureDefinition/regex","valueString":"([0-9]([0-9]([0-9][1-9]|[1-9]0)|[1-9]00)|[1-9]000)-(0[1-9]|1[0-2])-(0[1-9]|[1-2][0-9]|3[0-1])T([01][0-9]|2[0-3]):[0-5][0-9]:([0-5][0-9]|60)(\\.[0-9]{1,9})?(Z|(\\+|-)((0[0-9]|1[0-3]):[0-5][0-9]|14:00))"}]}]}]},"status":"active","text":{"div":"<div xmlns=\"http://www.w3.org/1999/xhtml\">to do</div>","status":"generated"},"type":"instant","url":"http://hl7.org/fhir/StructureDefinition/instant","version":"6.0.0-ballot4"}