---
type: "fhirpath-function"
title: "FHIRPath Function: ofType"
function: "ofType"
category: "Filtering and projection"
section: "5.2.7"
source: "fhirpath/functions.json"
---
# FHIRPath Function: ofType
Returns a collection that contains all items in the input collection that are of the given type or a subclass thereof. If the input collection is empty (`{ }`), the result is empty. The `type` argument is an identifier that must resolve to the name of a type in a model. For implementations with compile-time typing, this requires special-case handling when processing the argument to treat it as type specifier rather than an identifier expression:

``` fhirpath
Bundle.entry.resource.ofType(Patient)
```

In the above example, the symbol `Patient` must be treated as a type identifier rather than a reference to a Patient in context.

<a name="coalesce"></a>
## Summary
- **Category**: Filtering and projection
- **Section**: `5.2.7`
- **Return Type**: `collection`
- **Empty Input Result**: `empty`
- **Errors on Multiple Input**: `false`
## Description
Returns a collection that contains all items in the input collection that are of the given type or a subclass thereof.
## Arguments
- `type`: `type specifier` - Type to filter elements by
## Type Mapping
- `Any-Any`
## Example
```fhirpath
Bundle.entry.resource.ofType(Patient)
```