---
title: Catalog object
slug: ncig0154
canonical_url: https://docs.coveo.com/en/ncig0154/
collection: glossary
source_format: adoc
---
# Catalog object
A {doctitle} categorizes [items](https://docs.coveo.com/en/210/) in a [source](https://docs.coveo.com/en/246/) that holds [catalog data](https://docs.coveo.com/en/obcf0333/).
Items can be classified into three distinct object types: product, [variant](https://docs.coveo.com/en/mc7f0326/), and [availability](https://docs.coveo.com/en/mc7e9096/).

In an item [indexed](https://docs.coveo.com/en/204/) within a source, the value of the item's catalog object is stored in the `objecttype` [metadata](https://docs.coveo.com/en/218/).