---
layout: "docs_machine_readable"
page_title: "Machine-Readable Reference"
---

# Machine-Readable Reference

This is the reference for the various message categories for Packer
[machine-readable output](/docs/command-line/machine-readable.html).
Please read that page if you're unfamiliar with the general format and
usage for the machine-readable output.

The layout of this reference is split into where the types come from.
There are a set of core types that are from Packer core itself. Then
there are types that come from various components of Packer such as the
builders, provisioners, and more.

Within each section, the format of the documentation is the following:

<br>

<dl>
	<dt>type-name (data-count)</dt>
	<dd>
		<p>Description of the type.</p>
		<p>
		<strong>Data 1: name</strong> - Description.
		</p>
	</dd>
</dl>