type: fhirpath-functionfunction: firstcategory: Subsettingsection: 5.3.3source: fhirpath/functions.json
FHIRPath Function: first
Returns a collection containing only the first item in the input collection. This function is equivalent to item[0], so it will return an empty collection if the input collection has no items.
Summary
- Category: Subsetting
- Section:
5.3.3 - Return Type:
collection - Empty Input Result:
empty - Errors on Multiple Input:
false
Description
Returns a collection containing only the first item in the input collection. This function is equivalent to item[0].
Arguments
Type Mapping
Example
Patient.name.first() // returns the first name element