period

USCoreDocumentreferencePeriod

activeUS Core9.0.0date1 base

Time of service that is being documented

Metadata

hl7.org/fhir
Canonical URL
http://hl7.org/fhir/us/core/SearchParameter/us-core-documentreference-period
Code
period
Type
date
Multiple OR
Yes
Multiple AND
Yes

Base Resources

FHIRPath Expression

DocumentReference.context.period

Comparators

eqnegtgeltlesaebap

Multiple Value Support

Multiple OR:
Yes
Multiple AND:
Yes

Full Description

**Time of service that is being documented**  
NOTE: This SearchParameter is defined only to document Server and Client expectations. Its definition is derived from the standard FHIR SearchParameter and it uses the [Conformance expectation extension](http://hl7.org/fhir/StructureDefinition/capabilitystatement-expectation) to define additional expectations for the following SearchParameter elements:
- `multipleAnd`
- `multipleOr`
- `comparator`
- `modifier`
- `chain`

It **SHALL NOT** be used as a search parameter for search. Servers and Clients **SHOULD** use the standard FHIR SearchParameter.