FHIRPath Function: empty

Returns true if the input collection is empty ({ }) and false otherwise.

<a name="fn-exists"></a>

Summary

• Category: Existence
• Section: 5.1.1
• Return Type: Boolean
• Empty Input Result: true
• Errors on Multiple Input: false

Description

Returns true if the input collection is empty ({ }) and false otherwise.

Arguments

• none

Type Mapping

• Any-Boolean

Example

Patient.name.empty() // returns true if the patient has no names