An example to illustrate the date range that this organisation should be considered available using the core-defined extension

Table View

Organization.id[0]UKCore-Extension-Period-Example
Organization.extension[0].url[0]http://hl7.org/fhir/StructureDefinition/organization-period
Organization.extension[0].value[0].start[0]2017-01-01T00:00:00.000Z
Organization.identifier[0].use[0]official
Organization.identifier[0].system[0]https://fhir.nhs.uk/Id/ods-organization-code
Organization.identifier[0].value[0]RR8
Organization.name[0]LEEDS TEACHING HOSPITALS NHS TRUST

XML View

<Organization xmlns="http://hl7.org/fhir">
    <id value="UKCore-Extension-Period-Example" />
    <!--  **************extension start**************  -->
    <extension url="http://hl7.org/fhir/StructureDefinition/organization-period">
        <valuePeriod>
            <start value="2017-01-01T00:00:00.000Z" />
        </valuePeriod>
    </extension>
    <!--  *************extension end ***************** -->
    <identifier>
        <use value="official" />
        <system value="https://fhir.nhs.uk/Id/ods-organization-code" />
        <value value="RR8" />
    </identifier>
    <name value="LEEDS TEACHING HOSPITALS NHS TRUST" />
</Organization>

JSON View

{
    "resourceType": "Organization",
    "id": "UKCore-Extension-Period-Example",
    "extension":  [
        {
            "url": "http://hl7.org/fhir/StructureDefinition/organization-period",
            "valuePeriod": {
                "start": "2017-01-01T00:00:00.000Z"
            }
        }
    ],
    "identifier":  [
        {
            "use": "official",
            "system": "https://fhir.nhs.uk/Id/ods-organization-code",
            "value": "RR8"
        }
    ],
    "name": "LEEDS TEACHING HOSPITALS NHS TRUST"
}