---
type: "fhirpath-function"
title: "FHIRPath Function: exclude"
function: "exclude"
category: "Subsetting"
section: "5.3.9"
source: "fhirpath/functions.json"
---
# FHIRPath Function: exclude
Returns the set of items that are not in the `other` collection. Duplicate items will not be eliminated by this function, and order will be preserved.

e.g. `(1 | 2 | 3).exclude(2)`{:.fhirpath} returns `(1 | 3)`.
## Summary
- **Category**: Subsetting
- **Section**: `5.3.9`
- **Return Type**: `collection`
- **Empty Input Result**: `empty`
- **Errors on Multiple Input**: `false`
## Description
Returns the set of elements that are not in the `other` collection. Duplicate items will not be eliminated by this function, and order will be preserved.
## Arguments
- `other`: `collection` - Collection to exclude
## Type Mapping
- `Any-Any`
## Example
```fhirpath
(1 | 2 | 3).exclude(2) // returns (1 | 3)
```