---
layout: stdlib-reference
---

# attribute [domain]

## Description

Used on an hull shader entrypoint to specify the patch type used by the hull shader.

## Signature

<pre>
[<a href="domain.html">domain</a>(<a href="domain.html#decl-patchType" class="code_param">patchType</a>)]
</pre>

## Parameters

####  <a id="decl-patchType"></a>patchType
The patch type used by the hull shader. Valid values are "tri", "quad" and "isoline".