Name Flags Card. Type Description & Constraints Extension 0..1 Extension A date/time that is specified relative to another event extension:target 1..1 Extension Relative to what event extension 0..0 url 1..1 uri "target" value[x] 1..1 Reference(Resource) Value of extension extension:targetPath 1..1 Extension Relative to which element on the event extension 0..0 url 1..1 uri "targetPath" value[x] 1..1 string Value of extension extension:relationship 1..1 Extension before-start | before | before-end | concurrent-with-start | concurrent | concurrent-with-end | after-start | after | after-end extension 0..0 url 1..1 uri "relationship" value[x] 1..1 code Value of extension Binding: ActionRelationshipType (required) extension:offset 1..1 Extension How long extension 0..0 url 1..1 uri "offset" value[x] 1..1 Value of extension valueDuration Duration valueRange Range url 1..1 uri "http://hl7.org/fhir/StructureDefinition/cqf-relativeDateTime" value[x] 0..0 Documentation for this format
HL7 International / Clinical Decision Support
A date/time value that is determined based on a duration offset from a target event.
A date/time that is specified relative to another event
All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
Must have either extensions or value[x], not both
Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Extensions are always sliced by (at least) url
Additional content defined by implementations
May be used to represent additional information that is not part of the basic definition of the element. 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.
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.
The event that the date/time value is relative to.
Source of the definition for the extension code - a logical name or a URL.
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.
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).
The path to the element that defines the effective period for the event that the date/time value is relative to.
The specified path must be resolvable from the type of the target. The path is allowed to contain qualifiers (.) to traverse sub-elements, as well as indexers ([x]) to traverse multiple-cardinality sub-elements. Note that the index must be an integer constant.
before-start | before | before-end | concurrent-with-start | concurrent | concurrent-with-end | after-start | after | after-end
The relationship to the effective period of the target event that the date/time value is relative to.
A type that describes how two events are related in time.
A duration or range of durations that specifies the offset between the date/time value and the target event. For example, 30-60 minutes before.