FHIR FHIRPath Function: toString

This page is part of FHIR FHIRPath (FHIR-specific extensions). Base spec lives at FHIRPath.

toString() : string

If the input collection contains a single item, this function will return a single String if the type is a primitive, and it has a value (e.g. if hasValue() = true), and the primitive type has a System type for which toString() is defined. Otherwise the result is an empty collection.

Patient.birthDate.toString()

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