---
type: "fhirpath-function"
title: "FHIRPath Function: split"
function: "split"
category: "Additional String Functions"
section: "5.7.6"
source: "fhirpath/functions.json"
---
# FHIRPath Function: split
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The split function splits a singleton input string into a list of strings, using the given separator.
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If the input is empty, the result is empty.
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If the input string does not contain any appearances of the separator, the result is the input string.
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The following example illustrates the behavior of the `.split` operator:
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``` fhirpath
('A,B,C').split(',') // { 'A', 'B', 'C' }
('ABC').split(',') // { 'ABC' }
'A,,C'.split(',') // { 'A', '', 'C' }
```
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## Summary
- **Category**: Additional String Functions
- **Section**: `5.7.6`
- **Return Type**: `collection`
- **Empty Input Result**: `empty`
- **Errors on Multiple Input**: `true`
## Description
Splits the input string using `separator` as the split point and returns a collection with one string for each portion of the input.
## Arguments
- `separator`: `String` - String to use as separator
## Type Mapping
- `String-String`
## Example
```fhirpath
'a,b,c,d,e'.split(',') // { 'a', 'b', 'c', 'd', 'e' }
'a b c'.split(' ') // { 'a', 'b', 'c' }
```